Race Condition Affecting kernel-debug-core package, versions *
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Test your applications- Snyk ID SNYK-RHEL8-KERNELDEBUGCORE-7103617
- published 24 May 2024
- disclosed 21 May 2024
Introduced: 21 May 2024
CVE-2021-47248 Open this link in a new tabHow to fix?
There is no fixed version for RHEL:8 kernel-debug-core.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-debug-core package and not the kernel-debug-core package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
udp: fix race between close() and udp_abort()
Kaustubh reported and diagnosed a panic in udp_lib_lookup(). The root cause is udp_abort() racing with close(). Both racing functions acquire the socket lock, but udp{v6}_destroy_sock() release it before performing destructive actions.
We can't easily extend the socket lock scope to avoid the race, instead use the SOCK_DEAD flag to prevent udp_abort from doing any action when the critical race happens.
Diagnosed-and-tested-by: Kaustubh Pandey <kapandey@codeaurora.org>
References
- https://access.redhat.com/security/cve/CVE-2021-47248
- https://git.kernel.org/stable/c/2f73448041bd0682d4b552cfd314ace66107f1ad
- https://git.kernel.org/stable/c/5a88477c1c85e4baa51e91f2d40f2166235daa56
- https://git.kernel.org/stable/c/65310b0aff86980a011c7c7bfa487a333d4ca241
- https://git.kernel.org/stable/c/8729ec8a2238152a4afc212a331a6cd2c61aeeac
- https://git.kernel.org/stable/c/a0882f68f54f7a8b6308261acee9bd4faab5a69e
- https://git.kernel.org/stable/c/a8b897c7bcd47f4147d066e22cc01d1026d7640e
- https://git.kernel.org/stable/c/e3c36c773aed0fef8b1d3d555b43393ec564400f