CVE-2026-74369: Linux kernel · liveupdate: fix u-a-f in luo_file_unpreserve_files() and luo_file_finish()
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 9 Nov 2026, 14:03 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
Exploitation evidence
Disclosed: evidence found.
CVE published 15 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 9 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 24.04 LTSlinux-aws-6.14pkg:deb/ubuntu/linux-aws-6.14?arch=source&distro=nobleOther threats | Affected
| Fixed in– |
Ubuntu 24.04 LTSlinux-aws-6.17pkg:deb/ubuntu/linux-aws-6.17?arch=source&distro=nobleOther threats | Affected
| Fixed in– |
Ubuntu 24.04 LTSlinux-azure-6.11pkg:deb/ubuntu/linux-azure-6.11?arch=source&distro=nobleOther threats | Affected
| Fixed in– |
Ubuntu 24.04 LTSlinux-azure-6.14pkg:deb/ubuntu/linux-azure-6.14?arch=source&distro=nobleOther threats | Affected
| Fixed in– |
Ubuntu 24.04 LTSlinux-azure-6.17pkg:deb/ubuntu/linux-azure-6.17?arch=source&distro=nobleOther threats | Affected
| Fixed in– |
Ubuntu 24.04 LTSlinux-azure-fde-6.14pkg:deb/ubuntu/linux-azure-fde-6.14?arch=source&distro=nobleOther 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 fix is available that reorders module reference counting calls to prevent use-after-free. Users should apply the updated Linux kernel versions that include this fix. No additional mitigation steps are indicated.
Description
A use-after-free vulnerability in the Linux kernel's liveupdate component was fixed by reordering module reference counting calls to ensure the file handler module remains pinned during critical operations. The flaw involved improper ordering of module_put() and xa_erase() calls in luo_file_unpreserve_files() and luo_file_finish(), which could lead to accessing freed memory.
References
- ubuntu.com/security/CVE-2026-74369 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-74369 (opens in a new tab)
- git.kernel.org/linus/291dcd37c8c8f8f8e1bccc92228f44bf371762a8 (opens in a new tab)
- git.kernel.org/stable/c/291dcd37c8c8f8f8e1bccc92228f44bf371762a8 (opens in a new tab)
- git.kernel.org/stable/c/f7fca3db635022429382cf26e5b08b33558e375d (opens in a new tab)