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VulnerabilityPublished Updated

CVE-2025-38052: Linux kernel · net/tipc: fix slab-use-after-free Read in tipc_aead_encrypt_done

Affects Linux kernelSource GCVE Database

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Not known to be exploited · CVSS 8.8 High · fixed in 5.15.0-1090.97~20.04.1 : patch Linux kernel soon.

Data as of 11 Nov 2026, 12:30 UTC

CVSS 3.1 base score
8.8High
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 5.15.0-1090.97~20.04.1, 5.15.0-1094.103~20.04.1, 5.15.0-1090.99~20.04.1 +64
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 18 Jun 2025

  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 11 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
Ubuntu 26.04 LTSlinux-vmwarepkg:deb/ubuntu/linux-vmware?arch=source&distro=resoluteOther threatsAffected
  • =7.0.0-1006.6
Fixed in–
Ubuntu 25.10linux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=questingOther threatsAffected
  • 6.17.0-1003.3 – 6.17.0-1017.17
10 affected builds
Fixed in–
Ubuntu 24.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=nobleOther threatsAffected
  • <6.8.0-100.100
Fixed in
  • 6.8.0-100.100
Ubuntu 24.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=nobleOther threatsAffected
  • <6.8.0-1046.49
Fixed in
  • 6.8.0-1046.49
Ubuntu 24.04 LTSlinux-aws-6.14pkg:deb/ubuntu/linux-aws-6.14?arch=source&distro=nobleOther threatsAffected
  • <6.14.0-1013.13~24.04.1
Fixed in
  • 6.14.0-1013.13~24.04.1
Ubuntu 24.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=nobleOther threatsAffected
  • <6.8.0-1046.52
Fixed in
  • 6.8.0-1046.52

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 and has been incorporated into multiple Linux kernel versions starting from 5.15.0-1083.86~20.04.1 and later. Users and administrators should update to these fixed kernel versions as soon as possible. No additional mitigations are indicated by the vendor advisory.

Description

CVE-2025-38052 is a high-severity use-after-free vulnerability in the Linux kernel's Transparent Inter-Process Communication (TIPC) network protocol implementation. The flaw occurs in the tipc_aead_encrypt_done function, where a slab-use-after-free condition can be triggered after a network namespace deletion, leading to a read of freed memory. This issue arises when encryption operations are interrupted and a cryptographic worker thread accesses freed resources. The vulnerability has been fixed in several Linux kernel versions starting from 5.15.0-1083.86~20.04.1 and later.

References

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