🛡️ CVE-2026-46195 — kernel

🔴 CVSS 9.8 — Critical ✅ No Known Exploit NVD
9.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

smb: client: validate dacloffset before building DACL pointers

In the Linux kernel, the following vulnerability has been resolved:

smb: client: validate dacloffset before building DACL pointers

parse_sec_desc(), build_sec_desc(), and the chown path in

id_mode_to_cifs_acl() all add the server-supplied dacloffset to pntsd

before proving a DACL header fits inside the returned security

descriptor.

On 32-bit builds a malicious server can return dacloffset near

U32_MAX, wrap the derived DACL pointer below end_of_acl, and then slip

past the later pointer-based bounds checks. build_sec_desc() and

id_mode_to_cifs_acl() can then dereference DACL fields from the wrapped

pointer in the chmod/chown rewrite paths.

Validate dacloffset numerically before building any DACL pointer and

reuse the same helper at the three DACL entry points.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

Affected software

CVE-2026-46195 is recorded against 3 packages.

  • kernel (from 6.19.0 up to 7.0.7)
  • linux-kernel
  • unknown

Timeline and source

Published on 28 May 2026 and last revised on 6 August 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
security.access.redhat.com (Web)
access.redhat.com (Advisory)
access.redhat.com (Advisory)
access.redhat.com (Advisory)
access.redhat.com (Advisory)
github.com (Advisory)
nvd.nist.gov (Advisory)
bugzilla.redhat.com (Report)

CVE-2026-46195 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity Critical
CVSS Score 9.8
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2026-05-28
Updated 2026-08-12
Modified 2026-08-06

Affected Packages

Software From version Fixed in
kernel 6.19.0 7.0.7
linux-kernel — —
unknown — —

References

Similar Threats

Exploit Protection

Are you running kernel?

CVE-2026-46195 carries CVSS 9.8 Critical rating. BotEraser checks your installation against this and other known CVE records, and blocks IPs associated with exploit activity.

Check My Site For CVE-2026-46195 →

No credit card required  ·  Results in minutes

ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.