CVE-2022-49731: ata: libata-core: fix NULL pointer deref in ata_host_alloc_pinfo()
First published: Wed Feb 26 2025(Updated: )
In the Linux kernel, the following vulnerability has been resolved: ata: libata-core: fix NULL pointer deref in ata_host_alloc_pinfo() In an unlikely (and probably wrong?) case that the 'ppi' parameter of ata_host_alloc_pinfo() points to an array starting with a NULL pointer, there's going to be a kernel oops as the 'pi' local variable won't get reassigned from the initial value of NULL. Initialize 'pi' instead to '&ata_dummy_port_info' to fix the possible kernel oops for good... Found by Linux Verification Center (linuxtesting.org) with the SVACE static analysis tool.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | ||
| <4.9.320 | ||
| >=4.10<4.14.285 | ||
| >=4.15<4.19.249 | ||
| >=4.20<5.4.200 | ||
| >=5.5<5.10.124 | ||
| >=5.11<5.15.49 | ||
| >=5.16<5.18.6 | ||
| =5.19-rc1 |
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Reference Links
- https://git.kernel.org/stable/c/ca4693e6e06e4fd2b240c0fec47aa2498c94848e
- https://git.kernel.org/stable/c/1ac5efee33f29e704226506d429b84575a5d66f8
- https://git.kernel.org/stable/c/a810bd5af06977a847d1f202b22d7defd5c62497
- https://git.kernel.org/stable/c/253334f84c81bc6a43af489f108c0bddad989eef
- https://git.kernel.org/stable/c/36cd19e7d4e5571d77a2ed20c5b6ef50cf57734a
- https://git.kernel.org/stable/c/ff128fbea720bf763fa345680dda5f050bc24a47
- https://git.kernel.org/stable/c/07cbdb4807d369fbda73062a91b570c4dc5ec429
- https://git.kernel.org/stable/c/bf476fe22aa1851bab4728e0c49025a6a0bea307
Frequently Asked Questions
What is the severity of CVE-2022-49731?
CVE-2022-49731 is classified as a low-severity vulnerability in the Linux kernel.
How do I fix CVE-2022-49731?
To fix CVE-2022-49731, update your Linux kernel to the latest patched version provided by your distribution.
What software is affected by CVE-2022-49731?
CVE-2022-49731 affects the Linux kernel, specifically its libata-core component.
What type of vulnerability is CVE-2022-49731?
CVE-2022-49731 is a NULL pointer dereference vulnerability that could potentially lead to denial of service.
When was CVE-2022-49731 published?
CVE-2022-49731 was published in December 2022.
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