CVE-2026-89634
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
smb: client: fix ALIGN() overflow in symlink_data() error context loop
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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 76894f3e2f71177747b8b4763fb180e800279585 | affected | git | 2b4a25baa0b936fef6915c0459925077b324ecaf | Unavailable | None listed |
| 76894f3e2f71177747b8b4763fb180e800279585 | affected | git | b89d678f9eafcf8d74885983166ba26b40a04ea0 | Unavailable | None listed |
| 76894f3e2f71177747b8b4763fb180e800279585 | affected | git | 657372ba6ea50b4474d2a6a610097eae8cd1f3e9 | Unavailable | None listed |
| 76894f3e2f71177747b8b4763fb180e800279585 | affected | git | 1f824f61d1df52392eaf0b74dfa5659d724fde30 | Unavailable | None listed |
| 76894f3e2f71177747b8b4763fb180e800279585 | affected | git | 62a3025983c8c735a3c6fc85a59316f31b59af07 | Unavailable | None listed |
| 76894f3e2f71177747b8b4763fb180e800279585 | affected | git | 62656b024efc21c3230eade1a847f25871c3d2bb | Unavailable | None listed |
| 2d046892a493d9760c35fdaefc3017f27f91b621 | affected | git | Unavailable | Unavailable | None listed |
| 6.0.16 | affected | semver | 6.1 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 6.1 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 6.1 | Unavailable | None listed |
| 6.1.188 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.157 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.109 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.50 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.2.4 | unaffected | semver | Unavailable | 7.2.* | None listed |
| 7.3 | unaffected | original_commit_for_fix | Unavailable | * | None listed |