CVE-2026-64380
HIGH
8,2
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: low
Integrity: none
Availability: high
Description
AI Translation Available
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.
https://git.kernel.org/stable/c/0de5b8e76847f5de26f364a82c6602c4881c30da
https://git.kernel.org/stable/c/171605aed68380c2fa75dff9b3a1ed427c50065b
https://git.kernel.org/stable/c/4213c1208978483021d7d125c131de3985d38f61
https://git.kernel.org/stable/c/427eb7eb46425fec845a43e861f3d6e2899cae59
https://git.kernel.org/stable/c/46a84715a015cb48e1b9c219dc88c03d8a541ea4
https://git.kernel.org/stable/c/7ad2bcf2441430bb2e918fb3ef9a90d775a6e422
https://git.kernel.org/stable/c/86c5d470f5d42e61123b2f4b4f0b91f4eee5b980
https://git.kernel.org/stable/c/96e889bc1e759c83f25093e8c2f3da31b4973f30