Description
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix ALIGN() overflow in symlink_data() error context loop The check added by commit 7d9a7f1f96cd ("smb/client: fix possible infinite loop and oob read in symlink_data()") compared the post-ALIGN length against the remaining buffer, but ALIGN() itself can overflow: for ErrorDataLength near UINT32_MAX (e.g. 0xFFFFFFF9), ALIGN(x, 8) wraps to 0, so the subsequent bounds check passes, and the loop advances by zero bytes leaving 'p' pointing into stale data. Fix by checking the raw ErrorDataLength against the remaining space before applying ALIGN(), then checking again after. Since raw_len is bounded by the buffer, raw_len + 7 cannot overflow, so the second check is an exact post-alignment bounds guard.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
76894f3e2f71177747b8b4763fb180e800279585 to < 2b4a25baa0b936fef6915c0459925077b324ecafaffected76894f3e2f71177747b8b4763fb180e800279585 to < b89d678f9eafcf8d74885983166ba26b40a04ea0affected76894f3e2f71177747b8b4763fb180e800279585 to < 657372ba6ea50b4474d2a6a610097eae8cd1f3e9affected76894f3e2f71177747b8b4763fb180e800279585 to < 1f824f61d1df52392eaf0b74dfa5659d724fde30affected76894f3e2f71177747b8b4763fb180e800279585 to < 62a3025983c8c735a3c6fc85a59316f31b59af07affected76894f3e2f71177747b8b4763fb180e800279585 to < 62656b024efc21c3230eade1a847f25871c3d2bbaffected2d046892a493d9760c35fdaefc3017f27f91b621affected6.0.16 to < 6.1affected
Linux Linux
Default version status: affected
6.1affected0 to < 6.1unaffected6.1.188 to ≤ 6.1.*unaffected6.6.157 to ≤ 6.6.*unaffected6.12.109 to ≤ 6.12.*unaffected6.18.50 to ≤ 6.18.*unaffected7.2.4 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/2b4a25baa0b936fef6915c0459925077b324ecaf ↗
- https://git.kernel.org/stable/c/b89d678f9eafcf8d74885983166ba26b40a04ea0 ↗
- https://git.kernel.org/stable/c/657372ba6ea50b4474d2a6a610097eae8cd1f3e9 ↗
- https://git.kernel.org/stable/c/1f824f61d1df52392eaf0b74dfa5659d724fde30 ↗
- https://git.kernel.org/stable/c/62a3025983c8c735a3c6fc85a59316f31b59af07 ↗
- https://git.kernel.org/stable/c/62656b024efc21c3230eade1a847f25871c3d2bb ↗