🛡️ CVE-2026-46088 — kernel

🟡 CVSS 5.5 — Medium ✅ No Known Exploit NVD
5.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

ALSA: control: Validate buf_len before strnlen() in snd_ctl_elem_init_enum_names()

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

ALSA: control: Validate buf_len before strnlen() in snd_ctl_elem_init_enum_names()

snd_ctl_elem_init_enum_names() advances pointer p through the names

buffer while decrementing buf_len. If buf_len reaches zero but items

remain, the next iteration calls strnlen(p, 0).

While strnlen(p, 0) returns 0 and would hit the existing name_len == 0

error path, CONFIG_FORTIFY_SOURCE's fortified strnlen() first checks

maxlen against __builtin_dynamic_object_size(). When Clang loses track

of p's object size inside the loop, this triggers a BRK exception panic

before the return value is examined.

Add a buf_len == 0 guard at the loop entry to prevent calling fortified

strnlen() on an exhausted buffer.

Found by kernel fuzz testing through Xiaomi Smartphone.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Affected software

CVE-2026-46088 is recorded against 3 packages.

  • kernel (from 6.19.0 up to 7.0.4)
  • linux-kernel (from 6.19 up to 7.0.4)
  • unknown

Timeline and source

Published on 27 May 2026 and last revised on 22 July 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)
git.kernel.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

CVE-2026-46088 on other distributions

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

Details

Severity Medium
CVSS Score 5.5
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2026-05-27
Updated 2026-08-12
Modified 2026-07-22

Affected Packages

Software From version Fixed in
kernel 6.19.0 7.0.4
linux-kernel 6.19 7.0.4
unknown — —

References

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