CVE-2026-64138

CVE-2026-64138

High · published July 19, 2026

CVSS v3.1
8.8
EPSS
0%
Percentile
34.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00415 · 34.7th percentile
Published
2026-07-19T20:17Z
Affected products (7)
ProductVersionsFixed in
linux/linux_kernel≥ 5.15, < 6.12.926.12.92
linux/linux_kernel≥ 6.13, < 6.18.346.18.34
linux/linux_kernel≥ 6.19, < 7.0.117.0.11
linux/linux_kernelall versions—
linux/linux_kernelall versions—
linux/linux_kernelall versions—
linux/linux_kernelall versions—
References (5)
https://git.kernel.org/stable/c/18d8db24b0a5b7be4829238dd4022236df02d421 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1c9d0646a9959752f11ca1080dc1ff26bd1756cb · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/69f030cf95488ae1186c72ac8c66fd279664ea7f · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8efbea0253b7fa2d1960cab0fed36544ca0b41ab · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f0e5c9c663badc9982e6941322eef1cb17de0f11 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67
EPSS history
Timeline
  • 19 JUL 15:40Z
    ksmbd: validate SID in parent security descriptor during ACL inheritance
    cvelistv5