Vulnerability Details : CVE-2022-47946
An issue was discovered in the Linux kernel 5.10.x before 5.10.155. A use-after-free in io_sqpoll_wait_sq in fs/io_uring.c allows an attacker to crash the kernel, resulting in denial of service. finish_wait can be skipped. An attack can occur in some situations by forking a process and then quickly terminating it. NOTE: later kernel versions, such as the 5.15 longterm series, substantially changed the implementation of io_sqpoll_wait_sq.
Vulnerability category: Memory CorruptionDenial of service
Exploit prediction scoring system (EPSS) score for CVE-2022-47946
Probability of exploitation activity in the next 30 days: 0.04%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 6 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2022-47946
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|
|
5.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
nvd@nist.gov |
CWE ids for CVE-2022-47946
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Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.Assigned by: nvd@nist.gov (Primary)
References for CVE-2022-47946
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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.10.161&id=0f544353fec8e717d37724d95b92538e1de79e86
kernel/git/stable/linux.git - Linux kernel stable treeMailing List;Patch;Third Party Advisory
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http://www.openwall.com/lists/oss-security/2022/12/27/1
oss-security - Re: Linux kernel: use-after-free in io_sqpoll_wait_sqMailing List;Third Party Advisory
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https://www.openwall.com/lists/oss-security/2022/12/22/2
oss-security - Linux kernel: use-after-free in io_sqpoll_wait_sqExploit;Mailing List;Third Party Advisory
Products affected by CVE-2022-47946
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*