CVE-2026-72127: Linux kernel · netdev-genl: report NAPI thread PID in the caller's pid namespace
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
- 0.2% chance of exploitation in 30 days – higher than 10% 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 fix translates the NAPI thread PID through the caller's PID namespace to prevent leaking the global PID. Users should update to the fixed kernel versions as provided by their vendor. No additional mitigation is required beyond applying the official fix.
Description
A vulnerability in the Linux kernel's netdev-genl subsystem caused the NAPI thread PID to be reported in the initial PID namespace instead of the caller's PID namespace. This allowed callers in child PID namespaces to see the global PID of the NAPI kernel thread, which should have been reported as 0 in their namespace. The issue was fixed by translating the PID through the caller's PID namespace, aligning with previous fixes for similar thread PID reporting issues.
References
- nvd.nist.gov/vuln/detail/CVE-2026-72127 (opens in a new tab)
- git.kernel.org/stable/c/1f24c0d01db214c9e661915e9972404c96ca73c0 (opens in a new tab)
- git.kernel.org/stable/c/5e4c8e08ce95730c87d6ada0bdbe1131a3c06393 (opens in a new tab)
- git.kernel.org/stable/c/fb18095389fe81f140d39585a2624aca9d42227e (opens in a new tab)
- git.kernel.org/stable/c/fd750b694f1f9e1ecb8ca19314e4e21edbb15f42 (opens in a new tab)
- ubuntu.com/security/CVE-2026-72127 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-72127 (opens in a new tab)
- git.kernel.org/linus/1f24c0d01db214c9e661915e9972404c96ca73c0 (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)