CVE-2023-52893: gsmi: fix null-deref in gsmi_get_variable
First published: Wed Aug 21 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: gsmi: fix null-deref in gsmi_get_variable We can get EFI variables without fetching the attribute, so we must allow for that in gsmi. commit 859748255b43 ("efi: pstore: Omit efivars caching EFI varstore access layer") added a new get_variable call with attr=NULL, which triggers panic in gsmi.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | >=3.0<4.14.304 | |
| Linux Linux kernel | >=4.15<4.19.271 | |
| Linux Linux kernel | >=4.20<5.4.230 | |
| Linux Linux kernel | >=5.5<5.10.165 | |
| Linux Linux kernel | >=5.11<5.15.90 | |
| Linux Linux kernel | >=5.16<6.1.8 | |
| Linux Linux kernel | =6.2-rc1 | |
| Linux Linux kernel | =6.2-rc2 | |
| Linux Linux kernel | =6.2-rc3 | |
| Linux Linux kernel | =6.2-rc4 |
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Reference Links
- https://git.kernel.org/stable/c/ee5763ef829bd923033510de6d1df7c73f085e4b
- https://git.kernel.org/stable/c/32313c11bdc8a02c577abaf865be3664ab30410a
- https://git.kernel.org/stable/c/ffef77794fb5f1245c3249b86342bad2299accb5
- https://git.kernel.org/stable/c/ae2a9dcc8caa60b1e14671294e5ec902ea5d1dfd
- https://git.kernel.org/stable/c/eb0421d90f916dffe96b4c049ddf01c0c50620d2
- https://git.kernel.org/stable/c/6646d769fdb0ce4318ef9afd127f8526d1ca8393
- https://git.kernel.org/stable/c/a769b05eeed7accc4019a1ed9799dd72067f1ce8
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