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Linux : Security Vulnerabilities Published In 2021 (Gain Information)

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# 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-2021-45486 327 +Info 2021-12-25 2022-01-21
4.3
None Remote Medium Not required Partial None None
In the IPv4 implementation in the Linux kernel before 5.12.4, net/ipv4/route.c has an information leak because the hash table is very small.
2 CVE-2021-45485 327 +Info 2021-12-25 2022-01-21
5.0
None Remote Low Not required Partial None None
In the IPv6 implementation in the Linux kernel before 5.13.3, net/ipv6/output_core.c has an information leak because of certain use of a hash table which, although big, doesn't properly consider that IPv6-based attackers can typically choose among many IPv6 source addresses.
3 CVE-2021-45095 200 +Info 2021-12-16 2022-01-21
2.1
None Local Low Not required Partial None None
pep_sock_accept in net/phonet/pep.c in the Linux kernel through 5.15.8 has a refcount leak.
4 CVE-2021-35477 203 Bypass +Info 2021-08-02 2021-11-11
2.1
None Local Low Not required Partial None None
In the Linux kernel through 5.13.7, an unprivileged BPF program can obtain sensitive information from kernel memory via a Speculative Store Bypass side-channel attack because a certain preempting store operation does not necessarily occur before a store operation that has an attacker-controlled value.
5 CVE-2021-34693 909 +Info 2021-06-14 2021-09-20
2.1
None Local Low Not required Partial None None
net/can/bcm.c in the Linux kernel through 5.12.10 allows local users to obtain sensitive information from kernel stack memory because parts of a data structure are uninitialized.
6 CVE-2021-34556 203 Bypass +Info 2021-08-02 2021-12-14
2.1
None Local Low Not required Partial None None
In the Linux kernel through 5.13.7, an unprivileged BPF program can obtain sensitive information from kernel memory via a Speculative Store Bypass side-channel attack because the protection mechanism neglects the possibility of uninitialized memory locations on the BPF stack.
7 CVE-2021-31916 787 +Priv +Info 2021-05-06 2022-01-01
6.1
None Local Low Not required Partial Partial Complete
An out-of-bounds (OOB) memory write flaw was found in list_devices in drivers/md/dm-ioctl.c in the Multi-device driver module in the Linux kernel before 5.12. A bound check failure allows an attacker with special user (CAP_SYS_ADMIN) privilege to gain access to out-of-bounds memory leading to a system crash or a leak of internal kernel information. The highest threat from this vulnerability is to system availability.
8 CVE-2021-29647 +Info 2021-03-30 2021-06-23
2.1
None Local Low Not required Partial None None
An issue was discovered in the Linux kernel before 5.11.11. qrtr_recvmsg in net/qrtr/qrtr.c allows attackers to obtain sensitive information from kernel memory because of a partially uninitialized data structure, aka CID-50535249f624.
9 CVE-2021-29155 125 +Info 2021-04-20 2021-06-23
2.1
None Local Low Not required Partial None None
An issue was discovered in the Linux kernel through 5.11.x. kernel/bpf/verifier.c performs undesirable out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory. Specifically, for sequences of pointer arithmetic operations, the pointer modification performed by the first operation is not correctly accounted for when restricting subsequent operations.
10 CVE-2021-21781 908 +Info 2021-08-18 2021-08-26
2.1
None Local Low Not required Partial None None
An information disclosure vulnerability exists in the ARM SIGPAGE functionality of Linux Kernel v5.4.66 and v5.4.54. The latest version (5.11-rc4) seems to still be vulnerable. A userland application can read the contents of the sigpage, which can leak kernel memory contents. An attacker can read a process’s memory at a specific offset to trigger this vulnerability. This was fixed in kernel releases: 4.14.222 4.19.177 5.4.99 5.10.17 5.11
11 CVE-2021-20239 200 +Info 2021-05-28 2021-06-02
2.1
None Local Low Not required Partial None None
A flaw was found in the Linux kernel in versions before 5.4.92 in the BPF protocol. This flaw allows an attacker with a local account to leak information about kernel internal addresses. The highest threat from this vulnerability is to confidentiality.
12 CVE-2021-3506 125 +Info 2021-04-19 2022-01-21
5.6
None Local Low Not required Partial None Complete
An out-of-bounds (OOB) memory access flaw was found in fs/f2fs/node.c in the f2fs module in the Linux kernel in versions before 5.12.0-rc4. A bounds check failure allows a local attacker to gain access to out-of-bounds memory leading to a system crash or a leak of internal kernel information. The highest threat from this vulnerability is to system availability.
13 CVE-2020-35519 125 +Info 2021-05-06 2021-06-18
6.8
None Local Low Not required Complete Partial Complete
An out-of-bounds (OOB) memory access flaw was found in x25_bind in net/x25/af_x25.c in the Linux kernel version v5.12-rc5. A bounds check failure allows a local attacker with a user account on the system to gain access to out-of-bounds memory, leading to a system crash or a leak of internal kernel information. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
14 CVE-2020-35499 476 +Info 2021-02-19 2021-02-25
7.2
None Local Low Not required Complete Complete Complete
A NULL pointer dereference flaw in Linux kernel versions prior to 5.11 may be seen if sco_sock_getsockopt function in net/bluetooth/sco.c do not have a sanity check for a socket connection, when using BT_SNDMTU/BT_RCVMTU for SCO sockets. This could allow a local attacker with a special user privilege to crash the system (DOS) or leak kernel internal information.
15 CVE-2020-28588 681 +Info 2021-05-10 2021-05-19
2.1
None Local Low Not required Partial None None
An information disclosure vulnerability exists in the /proc/pid/syscall functionality of Linux Kernel 5.1 Stable and 5.4.66. More specifically, this issue has been introduced in v5.1-rc4 (commit 631b7abacd02b88f4b0795c08b54ad4fc3e7c7c0) and is still present in v5.10-rc4, so it’s likely that all versions in between are affected. An attacker can read /proc/pid/syscall to trigger this vulnerability, which leads to the kernel leaking memory contents.
16 CVE-2020-27171 193 +Info 2021-03-20 2021-04-08
3.6
None Local Low Not required Partial None Partial
An issue was discovered in the Linux kernel before 5.11.8. kernel/bpf/verifier.c has an off-by-one error (with a resultant integer underflow) affecting out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory, aka CID-10d2bb2e6b1d.
17 CVE-2020-27170 203 +Info 2021-03-20 2021-04-08
1.9
None Local Medium Not required Partial None None
An issue was discovered in the Linux kernel before 5.11.8. kernel/bpf/verifier.c performs undesirable out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory, aka CID-f232326f6966. This affects pointer types that do not define a ptr_limit.
Total number of vulnerabilities : 17   Page : 1 (This Page)
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