CVE-2025-40098: Linux kernel · ALSA: hda: cs35l41: Fix NULL pointer dereference in cs35l41_get_acpi_mute_state()
Affects Linux kernelSource GCVE Database
Not known to be exploited · fixed in 6.8.0-147.147 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 16:39 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 6.8.0-147.147, 6.8.0-1067.70, 6.17.0-1007.7~24.04.1 +20
Exploitation evidence
Disclosed: evidence found.
CVE published 30 Oct 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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 26 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 25.10linuxpkg:deb/ubuntu/linux?arch=source&distro=questingOther threats | Affected
| Fixed in
|
Ubuntu 25.10linux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=questingOther threats | Affected
| Fixed in
|
Ubuntu 25.10linux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=questingOther threats | Affected
| Fixed in
|
Ubuntu 25.10linux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=questingOther threats | Affected
| Fixed in– |
Ubuntu 25.10linux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=questingOther threats | Affected
| Fixed in
|
Ubuntu 25.10linux-oraclepkg:deb/ubuntu/linux-oracle?arch=source&distro=questingOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Official patches fixing this vulnerability have been released and are available in updated Linux kernel packages. Users should apply the security updates provided by their Linux distribution, such as the Ubuntu security notice USN-8029-1. No additional mitigation is required beyond applying the official kernel updates.
Description
A NULL pointer dereference vulnerability was identified and fixed in the Linux kernel's ALSA hda cs35l41 driver. The issue occurs because the return value of the function acpi_evaluate_dsm() was dereferenced without checking for NULL, which could cause a crash. This flaw has been resolved by adding a proper NULL check. The vulnerability affects multiple specific Linux kernel versions prior to 6.17.0-1008.8 and others as listed. The vendor has released official kernel updates addressing this and other security issues.
References
- ubuntu.com/security/CVE-2025-40098 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2025-40098 (opens in a new tab)
- git.kernel.org/linus/8527bbb33936340525a3504a00932b2f8fd75754 (opens in a new tab)
- git.kernel.org/stable/c/8527bbb33936340525a3504a00932b2f8fd75754 (opens in a new tab)
- git.kernel.org/stable/c/b518386db2b993d786c431caa9f46ce063c5cb05 (opens in a new tab)
- ubuntu.com/security/notices/USN-8029-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8030-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8029-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8048-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8029-3 (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2025-40098 (opens in a new tab)
- git.kernel.org/stable/c/19129a365d2bd019fb60662b36b2655931997f12 (opens in a new tab)
- ubuntu.com/security/notices/USN-8917-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8918-1 (opens in a new tab)