CVE-2026-74278: Linux kernel · ALSA: seq: Fix kernel heap address leak in bounce_error_event()
Affects Linux kernelSource GCVE Database
Not known to be exploited · fixed in 7.0.0-1014.14~24.04.1 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 13:47 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 7.0.0-1014.14~24.04.1, 7.0.0-1017.17~24.04.1, 7.0.0-1016.16~24.04.1 +11
Exploitation evidence
Disclosed: evidence found.
CVE published 15 Aug 2026
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 26.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=resoluteOther 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
A patch is available and should be applied to affected Linux kernel versions. The vendor advisory confirms that this vulnerability has been fixed. Users should update their Linux kernel to a patched version to prevent kernel heap address leaks via ALSA sequencer events.
Description
A kernel heap address leak vulnerability in the ALSA sequencer subsystem of the Linux kernel was fixed. The issue involved improper handling of bounce error events, which caused kernel heap addresses to be exposed to userspace clients. This was due to the kernel sending a kernel pointer in an event intended for user clients without proper sanitization. The fix differentiates event handling between user and kernel clients to prevent leaking kernel pointers to userspace.
References
- nvd.nist.gov/vuln/detail/CVE-2026-74278 (opens in a new tab)
- git.kernel.org/stable/c/0527a56cb327021cb73167cfddf0e49efa043500 (opens in a new tab)
- git.kernel.org/stable/c/93d260ce43a81df579c98bee92b91316df9c1c57 (opens in a new tab)
- git.kernel.org/stable/c/dae23c545eb5a2be3b27a82fd0f611894fb8ab69 (opens in a new tab)
- git.kernel.org/stable/c/efc86691e4d8083d9e380ea95042c2cf679f65fd (opens in a new tab)
- ubuntu.com/security/CVE-2026-74278 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-74278 (opens in a new tab)
- git.kernel.org/linus/efc86691e4d8083d9e380ea95042c2cf679f65fd (opens in a new tab)
- ubuntu.com/security/notices/USN-8888-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8889-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8887-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8888-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8887-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8887-3 (opens in a new tab)