CVEdetails.com the ultimate security vulnerability data source
(e.g.: CVE-2009-1234 or 2010-1234 or 20101234)
Log In   Register
  What's the CVSS score of your company?
Vulnerability Feeds & WidgetsNew   www.itsecdb.com  

Linux : Security Vulnerabilities Published In 2020

Press ESC to close
# CVE ID CWE ID # of Exploits Vulnerability Type(s) Publish Date Update Date Score Gained Access Level Access Complexity Authentication Conf. Integ. Avail.
1 CVE-2020-29661 416 2020-12-09 2021-11-30
7.2
None Local Low Not required Complete Complete Complete
A locking issue was discovered in the tty subsystem of the Linux kernel through 5.9.13. drivers/tty/tty_jobctrl.c allows a use-after-free attack against TIOCSPGRP, aka CID-54ffccbf053b.
2 CVE-2020-29660 416 2020-12-09 2021-11-30
2.1
None Local Low Not required Partial None None
A locking inconsistency issue was discovered in the tty subsystem of the Linux kernel through 5.9.13. drivers/tty/tty_io.c and drivers/tty/tty_jobctrl.c may allow a read-after-free attack against TIOCGSID, aka CID-c8bcd9c5be24.
3 CVE-2020-29569 252 +Info 2020-12-15 2021-07-21
7.2
None Local Low Not required Complete Complete Complete
An issue was discovered in the Linux kernel through 5.10.1, as used with Xen through 4.14.x. The Linux kernel PV block backend expects the kernel thread handler to reset ring->xenblkd to NULL when stopped. However, the handler may not have time to run if the frontend quickly toggles between the states connect and disconnect. As a consequence, the block backend may re-use a pointer after it was freed. A misbehaving guest can trigger a dom0 crash by continuously connecting / disconnecting a block frontend. Privilege escalation and information leaks cannot be ruled out. This only affects systems with a Linux blkback.
4 CVE-2020-29534 2020-12-03 2021-06-02
7.2
None Local Low Not required Complete Complete Complete
An issue was discovered in the Linux kernel before 5.9.3. io_uring takes a non-refcounted reference to the files_struct of the process that submitted a request, causing execve() to incorrectly optimize unshare_fd(), aka CID-0f2122045b94.
5 CVE-2020-29374 362 2020-11-28 2021-07-13
3.3
None Local Medium Not required Partial Partial None
An issue was discovered in the Linux kernel before 5.7.3, related to mm/gup.c and mm/huge_memory.c. The get_user_pages (aka gup) implementation, when used for a copy-on-write page, does not properly consider the semantics of read operations and therefore can grant unintended write access, aka CID-17839856fd58.
6 CVE-2020-29373 22 Dir. Trav. 2020-11-28 2020-12-02
2.1
None Local Low Not required Partial None None
An issue was discovered in fs/io_uring.c in the Linux kernel before 5.6. It unsafely handles the root directory during path lookups, and thus a process inside a mount namespace can escape to unintended filesystem locations, aka CID-ff002b30181d.
7 CVE-2020-29372 362 2020-11-28 2021-04-08
4.7
None Local Medium Not required None None Complete
An issue was discovered in do_madvise in mm/madvise.c in the Linux kernel before 5.6.8. There is a race condition between coredump operations and the IORING_OP_MADVISE implementation, aka CID-bc0c4d1e176e.
8 CVE-2020-29371 908 2020-11-28 2020-12-02
2.1
None Local Low Not required Partial None None
An issue was discovered in romfs_dev_read in fs/romfs/storage.c in the Linux kernel before 5.8.4. Uninitialized memory leaks to userspace, aka CID-bcf85fcedfdd.
9 CVE-2020-29370 362 2020-11-28 2020-12-18
4.4
None Local Medium Not required Partial Partial Partial
An issue was discovered in kmem_cache_alloc_bulk in mm/slub.c in the Linux kernel before 5.5.11. The slowpath lacks the required TID increment, aka CID-fd4d9c7d0c71.
10 CVE-2020-29369 362 2020-11-28 2021-02-24
6.9
None Local Medium Not required Complete Complete Complete
An issue was discovered in mm/mmap.c in the Linux kernel before 5.7.11. There is a race condition between certain expand functions (expand_downwards and expand_upwards) and page-table free operations from an munmap call, aka CID-246c320a8cfe.
11 CVE-2020-29368 787 2020-11-28 2021-07-21
6.9
None Local Medium Not required Complete Complete Complete
An issue was discovered in __split_huge_pmd in mm/huge_memory.c in the Linux kernel before 5.7.5. The copy-on-write implementation can grant unintended write access because of a race condition in a THP mapcount check, aka CID-c444eb564fb1.
12 CVE-2020-28974 125 2020-11-20 2021-01-27
6.1
None Local Low Not required Partial Partial Complete
A slab-out-of-bounds read in fbcon in the Linux kernel before 5.9.7 could be used by local attackers to read privileged information or potentially crash the kernel, aka CID-3c4e0dff2095. This occurs because KD_FONT_OP_COPY in drivers/tty/vt/vt.c can be used for manipulations such as font height.
13 CVE-2020-28941 763 DoS 2020-11-19 2020-12-11
4.9
None Local Low Not required None None Complete
An issue was discovered in drivers/accessibility/speakup/spk_ttyio.c in the Linux kernel through 5.9.9. Local attackers on systems with the speakup driver could cause a local denial of service attack, aka CID-d41227544427. This occurs because of an invalid free when the line discipline is used more than once.
14 CVE-2020-28915 125 2020-11-18 2020-12-15
6.1
None Local Low Not required Partial Partial Complete
A buffer over-read (at the framebuffer layer) in the fbcon code in the Linux kernel before 5.8.15 could be used by local attackers to read kernel memory, aka CID-6735b4632def.
15 CVE-2020-27825 362 DoS +Info 2020-12-11 2021-05-21
5.4
None Local Medium Not required Partial None Complete
A use-after-free flaw was found in kernel/trace/ring_buffer.c in Linux kernel (before 5.10-rc1). There was a race problem in trace_open and resize of cpu buffer running parallely on different cpus, may cause a denial of service problem (DOS). This flaw could even allow a local attacker with special user privilege to a kernel information leak threat.
16 CVE-2020-27786 416 Exec Code Mem. Corr. 2020-12-11 2021-05-12
7.2
None Local Low Not required Complete Complete Complete
A flaw was found in the Linux kernel’s implementation of MIDI, where an attacker with a local account and the permissions to issue ioctl commands to midi devices could trigger a use-after-free issue. A write to this specific memory while freed and before use causes the flow of execution to change and possibly allow for memory corruption or privilege escalation. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
17 CVE-2020-27777 862 2020-12-15 2020-12-22
7.2
None Local Low Not required Complete Complete Complete
A flaw was found in the way RTAS handled memory accesses in userspace to kernel communication. On a locked down (usually due to Secure Boot) guest system running on top of PowerVM or KVM hypervisors (pseries platform) a root like local user could use this flaw to further increase their privileges to that of a running kernel.
18 CVE-2020-27675 362 2020-10-22 2021-07-21
4.7
None Local Medium Not required None None Complete
An issue was discovered in the Linux kernel through 5.9.1, as used with Xen through 4.14.x. drivers/xen/events/events_base.c allows event-channel removal during the event-handling loop (a race condition). This can cause a use-after-free or NULL pointer dereference, as demonstrated by a dom0 crash via events for an in-reconfiguration paravirtualized device, aka CID-073d0552ead5.
19 CVE-2020-27673 400 DoS 2020-10-22 2021-07-21
4.9
None Local Low Not required None None Complete
An issue was discovered in the Linux kernel through 5.9.1, as used with Xen through 4.14.x. Guest OS users can cause a denial of service (host OS hang) via a high rate of events to dom0, aka CID-e99502f76271.
20 CVE-2020-27194 119 Overflow 2020-10-16 2020-10-30
2.1
None Local Low Not required None None Partial
An issue was discovered in the Linux kernel before 5.8.15. scalar32_min_max_or in kernel/bpf/verifier.c mishandles bounds tracking during use of 64-bit values, aka CID-5b9fbeb75b6a.
21 CVE-2020-27152 835 2020-11-06 2020-11-16
2.1
None Local Low Not required None None Partial
An issue was discovered in ioapic_lazy_update_eoi in arch/x86/kvm/ioapic.c in the Linux kernel before 5.9.2. It has an infinite loop related to improper interaction between a resampler and edge triggering, aka CID-77377064c3a9.
22 CVE-2020-26541 2020-10-02 2020-10-05
6.9
None Local Medium Not required Complete Complete Complete
The Linux kernel through 5.8.13 does not properly enforce the Secure Boot Forbidden Signature Database (aka dbx) protection mechanism. This affects certs/blacklist.c and certs/system_keyring.c.
23 CVE-2020-26088 276 Bypass 2020-09-24 2020-11-02
2.1
None Local Low Not required None Partial None
A missing CAP_NET_RAW check in NFC socket creation in net/nfc/rawsock.c in the Linux kernel before 5.8.2 could be used by local attackers to create raw sockets, bypassing security mechanisms, aka CID-26896f01467a.
24 CVE-2020-25705 330 Bypass 2020-11-17 2021-05-18
5.8
None Remote Medium Not required Partial Partial None
A flaw in ICMP packets in the Linux kernel may allow an attacker to quickly scan open UDP ports. This flaw allows an off-path remote attacker to effectively bypass source port UDP randomization. Software that relies on UDP source port randomization are indirectly affected as well on the Linux Based Products (RUGGEDCOM RM1224: All versions between v5.0 and v6.4, SCALANCE M-800: All versions between v5.0 and v6.4, SCALANCE S615: All versions between v5.0 and v6.4, SCALANCE SC-600: All versions prior to v2.1.3, SCALANCE W1750D: v8.3.0.1, v8.6.0, and v8.7.0, SIMATIC Cloud Connect 7: All versions, SIMATIC MV500 Family: All versions, SIMATIC NET CP 1243-1 (incl. SIPLUS variants): Versions 3.1.39 and later, SIMATIC NET CP 1243-7 LTE EU: Version
25 CVE-2020-25704 401 DoS 2020-12-02 2022-01-01
4.9
None Local Low Not required None None Complete
A flaw memory leak in the Linux kernel performance monitoring subsystem was found in the way if using PERF_EVENT_IOC_SET_FILTER. A local user could use this flaw to starve the resources causing denial of service.
26 CVE-2020-25656 416 2020-12-02 2022-01-01
1.9
None Local Medium Not required Partial None None
A flaw was found in the Linux kernel. A use-after-free was found in the way the console subsystem was using ioctls KDGKBSENT and KDSKBSENT. A local user could use this flaw to get read memory access out of bounds. The highest threat from this vulnerability is to data confidentiality.
27 CVE-2020-25645 319 2020-10-13 2021-03-26
5.0
None Remote Low Not required Partial None None
A flaw was found in the Linux kernel in versions before 5.9-rc7. Traffic between two Geneve endpoints may be unencrypted when IPsec is configured to encrypt traffic for the specific UDP port used by the GENEVE tunnel allowing anyone between the two endpoints to read the traffic unencrypted. The main threat from this vulnerability is to data confidentiality.
28 CVE-2020-25643 20 DoS Overflow Mem. Corr. 2020-10-06 2021-10-19
7.5
None Remote Medium ??? Partial Partial Complete
A flaw was found in the HDLC_PPP module of the Linux kernel in versions before 5.9-rc7. Memory corruption and a read overflow is caused by improper input validation in the ppp_cp_parse_cr function which can cause the system to crash or cause a denial of service. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
29 CVE-2020-25641 835 DoS 2020-10-06 2020-12-04
4.9
None Local Low Not required None None Complete
A flaw was found in the Linux kernel's implementation of biovecs in versions before 5.9-rc7. A zero-length biovec request issued by the block subsystem could cause the kernel to enter an infinite loop, causing a denial of service. This flaw allows a local attacker with basic privileges to issue requests to a block device, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
30 CVE-2020-25285 362 2020-09-13 2021-07-21
4.4
None Local Medium Not required Partial Partial Partial
A race condition between hugetlb sysctl handlers in mm/hugetlb.c in the Linux kernel before 5.8.8 could be used by local attackers to corrupt memory, cause a NULL pointer dereference, or possibly have unspecified other impact, aka CID-17743798d812.
31 CVE-2020-25284 732 2020-09-13 2021-07-21
1.9
None Local Medium Not required None Partial None
The rbd block device driver in drivers/block/rbd.c in the Linux kernel through 5.8.9 used incomplete permission checking for access to rbd devices, which could be leveraged by local attackers to map or unmap rbd block devices, aka CID-f44d04e696fe.
32 CVE-2020-25221 672 2020-09-10 2020-10-01
7.2
None Local Low Not required Complete Complete Complete
get_gate_page in mm/gup.c in the Linux kernel 5.7.x and 5.8.x before 5.8.7 allows privilege escalation because of incorrect reference counting (caused by gate page mishandling) of the struct page that backs the vsyscall page. The result is a refcount underflow. This can be triggered by any 64-bit process that can use ptrace() or process_vm_readv(), aka CID-9fa2dd946743.
33 CVE-2020-25220 416 2020-09-10 2021-01-20
7.2
None Local Low Not required Complete Complete Complete
The Linux kernel 4.9.x before 4.9.233, 4.14.x before 4.14.194, and 4.19.x before 4.19.140 has a use-after-free because skcd->no_refcnt was not considered during a backport of a CVE-2020-14356 patch. This is related to the cgroups feature.
34 CVE-2020-25212 367 2020-09-09 2021-07-21
4.4
None Local Medium Not required Partial Partial Partial
A TOCTOU mismatch in the NFS client code in the Linux kernel before 5.8.3 could be used by local attackers to corrupt memory or possibly have unspecified other impact because a size check is in fs/nfs/nfs4proc.c instead of fs/nfs/nfs4xdr.c, aka CID-b4487b935452.
35 CVE-2020-25211 120 Overflow 2020-09-09 2020-11-02
3.6
None Local Low Not required None Partial Partial
In the Linux kernel through 5.8.7, local attackers able to inject conntrack netlink configuration could overflow a local buffer, causing crashes or triggering use of incorrect protocol numbers in ctnetlink_parse_tuple_filter in net/netfilter/nf_conntrack_netlink.c, aka CID-1cc5ef91d2ff.
36 CVE-2020-24394 732 2020-08-19 2021-06-14
3.6
None Local Low Not required Partial Partial None
In the Linux kernel before 5.7.8, fs/nfsd/vfs.c (in the NFS server) can set incorrect permissions on new filesystem objects when the filesystem lacks ACL support, aka CID-22cf8419f131. This occurs because the current umask is not considered.
37 CVE-2020-16166 200 +Info 2020-07-30 2021-07-21
4.3
None Remote Medium Not required Partial None None
The Linux kernel through 5.7.11 allows remote attackers to make observations that help to obtain sensitive information about the internal state of the network RNG, aka CID-f227e3ec3b5c. This is related to drivers/char/random.c and kernel/time/timer.c.
38 CVE-2020-15852 276 2020-07-20 2020-08-10
4.6
None Local Low Not required Partial Partial Partial
An issue was discovered in the Linux kernel 5.5 through 5.7.9, as used in Xen through 4.13.x for x86 PV guests. An attacker may be granted the I/O port permissions of an unrelated task. This occurs because tss_invalidate_io_bitmap mishandling causes a loss of synchronization between the I/O bitmaps of TSS and Xen, aka CID-cadfad870154.
39 CVE-2020-15780 863 Bypass 2020-07-15 2021-07-21
7.2
None Local Low Not required Complete Complete Complete
An issue was discovered in drivers/acpi/acpi_configfs.c in the Linux kernel before 5.7.7. Injection of malicious ACPI tables via configfs could be used by attackers to bypass lockdown and secure boot restrictions, aka CID-75b0cea7bf30.
40 CVE-2020-15437 476 DoS 2020-11-23 2020-12-02
4.9
None Local Low Not required None None Complete
The Linux kernel before version 5.8 is vulnerable to a NULL pointer dereference in drivers/tty/serial/8250/8250_core.c:serial8250_isa_init_ports() that allows local users to cause a denial of service by using the p->serial_in pointer which uninitialized.
41 CVE-2020-15436 416 DoS +Priv 2020-11-23 2020-12-18
7.2
None Local Low Not required Complete Complete Complete
Use-after-free vulnerability in fs/block_dev.c in the Linux kernel before 5.8 allows local users to gain privileges or cause a denial of service by leveraging improper access to a certain error field.
42 CVE-2020-15393 772 2020-06-29 2021-07-21
2.1
None Local Low Not required None None Partial
In the Linux kernel 4.4 through 5.7.6, usbtest_disconnect in drivers/usb/misc/usbtest.c has a memory leak, aka CID-28ebeb8db770.
43 CVE-2020-14416 416 2020-06-18 2021-07-21
4.7
None Local Medium Not required None None Complete
In the Linux kernel before 5.4.16, a race condition in tty->disc_data handling in the slip and slcan line discipline could lead to a use-after-free, aka CID-0ace17d56824. This affects drivers/net/slip/slip.c and drivers/net/can/slcan.c.
44 CVE-2020-14390 787 DoS Mem. Corr. 2020-09-18 2020-11-02
4.6
None Local Low Not required Partial Partial Partial
A flaw was found in the Linux kernel in versions before 5.9-rc6. When changing screen size, an out-of-bounds memory write can occur leading to memory corruption or a denial of service. Due to the nature of the flaw, privilege escalation cannot be fully ruled out.
45 CVE-2020-14386 787 +Priv Mem. Corr. 2020-09-16 2021-12-10
7.2
None Local Low Not required Complete Complete Complete
A flaw was found in the Linux kernel before 5.9-rc4. Memory corruption can be exploited to gain root privileges from unprivileged processes. The highest threat from this vulnerability is to data confidentiality and integrity.
46 CVE-2020-14385 131 DoS 2020-09-15 2020-10-15
4.7
None Local Medium Not required None None Complete
A flaw was found in the Linux kernel before 5.9-rc4. A failure of the file system metadata validator in XFS can cause an inode with a valid, user-creatable extended attribute to be flagged as corrupt. This can lead to the filesystem being shutdown, or otherwise rendered inaccessible until it is remounted, leading to a denial of service. The highest threat from this vulnerability is to system availability.
47 CVE-2020-14381 416 2020-12-03 2020-12-08
4.6
None Local Low Not required Partial Partial Partial
A flaw was found in the Linux kernel’s futex implementation. This flaw allows a local attacker to corrupt system memory or escalate their privileges when creating a futex on a filesystem that is about to be unmounted. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
48 CVE-2020-14356 476 2020-08-19 2020-11-02
7.2
None Local Low Not required Complete Complete Complete
A flaw null pointer dereference in the Linux kernel cgroupv2 subsystem in versions before 5.7.10 was found in the way when reboot the system. A local user could use this flaw to crash the system or escalate their privileges on the system.
49 CVE-2020-14351 416 2020-12-03 2021-11-04
4.6
None Local Low Not required Partial Partial Partial
A flaw was found in the Linux kernel. A use-after-free memory flaw was found in the perf subsystem allowing a local attacker with permission to monitor perf events to corrupt memory and possibly escalate privileges. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
50 CVE-2020-14331 787 2020-09-15 2021-01-13
7.2
None Local Low Not required Complete Complete Complete
A flaw was found in the Linux kernel’s implementation of the invert video code on VGA consoles when a local attacker attempts to resize the console, calling an ioctl VT_RESIZE, which causes an out-of-bounds write to occur. This flaw allows a local user with access to the VGA console to crash the system, potentially escalating their privileges on the system. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Total number of vulnerabilities : 126   Page : 1 (This Page)2 3
CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site. OVAL is a registered trademark of The MITRE Corporation and the authoritative source of OVAL content is MITRE's OVAL web site.
Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.