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VulnerabilityPublished Updated

CVE-2026-74498: Linux kernel · ALSA: usb-audio: Fix DMA buffer out-of-bounds write when fill_max is set

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in f9b6c9576568169139ac151f7881474f384659fd : patch Linux kernel soon.

Data as of 6 Nov 2026, 17:56 UTC

Severity
High

Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD

Thin evidence

One scorer or none
CISA SSVC
Exploitation
No evidence of active exploitation and no public proof of concept
Automatable
Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact
Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-06.

Patch
Available – fixed in f9b6c9576568169139ac151f7881474f384659fd, d0199ae1666ff9ae2d1d568d64c3430d4c47f0e5, bd65b7191683bebd9923904f0558b9211b9129da +5

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 15 Aug 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 8fdff6a319e7dac757c558bd283dc4577e68cde7, < f9b6c9576568169139ac151f7881474f384659fd
Fixed in
  • f9b6c9576568169139ac151f7881474f384659fd
LinuxLinuxAffected
  • ≥ 8fdff6a319e7dac757c558bd283dc4577e68cde7, < d0199ae1666ff9ae2d1d568d64c3430d4c47f0e5
Fixed in
  • d0199ae1666ff9ae2d1d568d64c3430d4c47f0e5
LinuxLinuxAffected
  • ≥ 8fdff6a319e7dac757c558bd283dc4577e68cde7, < bd65b7191683bebd9923904f0558b9211b9129da
Fixed in
  • bd65b7191683bebd9923904f0558b9211b9129da
LinuxLinuxAffected
  • ≥ 8fdff6a319e7dac757c558bd283dc4577e68cde7, < b1770f9ac35c0ffc34914d52347c65dcd5ac049b
Fixed in
  • b1770f9ac35c0ffc34914d52347c65dcd5ac049b
LinuxLinuxAffected
  • ≥ 8fdff6a319e7dac757c558bd283dc4577e68cde7, < 3852974608f53e530e27c21d0c6c7d79c17b3f5a
Fixed in
  • 3852974608f53e530e27c21d0c6c7d79c17b3f5a
LinuxLinuxAffected
  • ≥ 8fdff6a319e7dac757c558bd283dc4577e68cde7, < 04595233e5606d452f9f47e6989fc7ae7440fd40
Fixed in
  • 04595233e5606d452f9f47e6989fc7ae7440fd40

AI-suggested

A fix is available and has been applied in the Linux kernel versions identified by the provided commit hashes. Users should update to a fixed Linux kernel version containing these commits to remediate the vulnerability.

Description

A vulnerability in the Linux kernel ALSA usb-audio driver caused an out-of-bounds DMA buffer write when the fill_max flag was set. This occurred because the DMA buffer was allocated based on an incorrect size, leading to potential kernel heap memory corruption during USB audio data transfers. The issue has been fixed by updating the buffer size calculation to match the actual transfer size when fill_max is set.

References

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