Race Condition Affecting kernel-debug package, versions *
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Test your applications- Snyk ID SNYK-RHEL8-KERNELDEBUG-7758619
- published 21 Aug 2024
- disclosed 17 Aug 2024
Introduced: 17 Aug 2024
CVE-2024-43856 Open this link in a new tabHow to fix?
There is no fixed version for RHEL:8 kernel-debug.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-debug package and not the kernel-debug 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:
dma: fix call order in dmam_free_coherent
dmam_free_coherent() frees a DMA allocation, which makes the freed vaddr available for reuse, then calls devres_destroy() to remove and free the data structure used to track the DMA allocation. Between the two calls, it is possible for a concurrent task to make an allocation with the same vaddr and add it to the devres list.
If this happens, there will be two entries in the devres list with the same vaddr and devres_destroy() can free the wrong entry, triggering the WARN_ON() in dmam_match.
Fix by destroying the devres entry before freeing the DMA allocation.
kokonut //net/encryption http://sponge2/b9145fe6-0f72-4325-ac2f-a84d81075b03
References
- https://access.redhat.com/security/cve/CVE-2024-43856
- https://git.kernel.org/stable/c/1fe97f68fce1ba24bf823bfb0eb0956003473130
- https://git.kernel.org/stable/c/22094f5f52e7bc16c5bf9613365049383650b02e
- https://git.kernel.org/stable/c/257193083e8f43907e99ea633820fc2b3bcd24c7
- https://git.kernel.org/stable/c/28e8b7406d3a1f5329a03aa25a43aa28e087cb20
- https://git.kernel.org/stable/c/2f7bbdc744f2e7051d1cb47c8e082162df1923c9
- https://git.kernel.org/stable/c/87b34c8c94e29fa01d744e5147697f592998d954
- https://git.kernel.org/stable/c/f993a4baf6b622232e4c190d34c220179e5d61eb
- https://git.kernel.org/stable/c/fe2d246080f035e0af5793cb79067ba125e4fb63