CVE-2026-64138
In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate SID in parent security descriptor during ACL inheritance Introduce smb_validate_ntsd_sid() helper to safely validate Owner SID and Group SID inside the NT Security…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.41%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate SID in parent security descriptor during ACL inheritance Introduce smb_validate_ntsd_sid() helper to safely validate Owner SID and Group SID inside the NT Security Descriptor (smb_ntsd) retrieved from the parent directory.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.41% probability · 35th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/18d8db24b0a5b7be4829238dd4022236df02d421Patch
- https://git.kernel.org/stable/c/1c9d0646a9959752f11ca1080dc1ff26bd1756cbPatch
- https://git.kernel.org/stable/c/69f030cf95488ae1186c72ac8c66fd279664ea7fPatch
- https://git.kernel.org/stable/c/f0e5c9c663badc9982e6941322eef1cb17de0f11Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.