HIGHVulnerability
CVE-2026-64380
In the Linux kernel, the following vulnerability has been resolved: smb: client: harden POSIX SID length parsing posix_info_sid_size() reads sid[1] to obtain the subauthority count, but its existing boundary check still accepts buffers with only one remaining byte. Require two bytes before reading sid[1] so all client paths that reuse the helper reject truncated POSIX SIDs safely.
Properties
- severity
- HIGH
- score
- 8.2
- cve_id
- CVE-2026-64380
- vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
- published_at
- 2026-07-25T10:17:21.220
- last_modified
- 2026-08-11T15:01:50.637
Related Entities (1)
DESCRIBED_BY (1)
→[Source]NVD
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