CVE-2026-72299: Linux kernel · tipc: restrict socket queue dumps in enqueue tracepoints
Affects Linux kernelSource GCVE Database
Not known to be exploited · CVSS 9.8 Critical · fixed in 7.0.0-1013.13~24.04.1 : patch Linux kernel as a priority.
Data as of 26 Oct 2026, 12:55 UTC
- EPSS
- 0.7% chance of exploitation in 30 days – higher than 54% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 7.0.0-1013.13~24.04.1, 7.0.0-1017.17~24.04.1, 7.0.0-1016.16~24.04.1 +13
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitation 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 to restrict socket queue dumps in the TIPC subsystem to safe queues protected by the spinlock. Users should update to fixed kernel versions as listed in the affectedVersions field. No additional mitigation is required beyond applying the official fix.
Description
A vulnerability in the Linux kernel's TIPC subsystem was resolved, involving unsafe socket queue dumps in the enqueue tracepoints of tipc_sk_enqueue(). The issue arises because the spinlock protecting the backlog queue does not serialize against the socket owner consuming or purging the receive queue, leading to potential use-after-free conditions. This could allow an attacker to cause memory corruption or system instability. The vulnerability has a high CVSS score of 9.8 and affects multiple specific Linux kernel versions. A patch is available to restrict unsafe queue dumps to only those protected by the held spinlock.
References
- nvd.nist.gov/vuln/detail/CVE-2026-72299 (opens in a new tab)
- git.kernel.org/stable/c/12876864f9de5fa6f611a30c6c17e405a773bf0a (opens in a new tab)
- git.kernel.org/stable/c/61a55fa24a5d737436018764a647fe5b6cb36371 (opens in a new tab)
- git.kernel.org/stable/c/6acbbe54215d5f4251593000cff2bf51d6748713 (opens in a new tab)
- git.kernel.org/stable/c/acd7df8d955480a6f6e5bb809da67b1500cc3cf4 (opens in a new tab)
- git.kernel.org/stable/c/b9e100815f4b55e9ccaf6af9a3aba173eb13d381 (opens in a new tab)
- ubuntu.com/security/CVE-2026-72299 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-72299 (opens in a new tab)
- git.kernel.org/linus/acd7df8d955480a6f6e5bb809da67b1500cc3cf4 (opens in a new tab)
- ubuntu.com/security/notices/USN-8781-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8816-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8816-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8816-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-8816-4 (opens in a new tab)
- ubuntu.com/security/notices/USN-8888-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8888-2 (opens in a new tab)