CVE-2026-72406: Linux kernel · net: sungem: fix probe error cleanup
Affects Linux kernelSource GCVE Database
Not known to be exploited · CVSS 7.8 High · fixed in 5.15.0-1117.124~20.04.1 : patch Linux kernel soon.
Data as of 28 Oct 2026, 02:47 UTC
- Patch
- Available – fixed in 5.15.0-1117.124~20.04.1, 5.15.0-1123.132~20.04.1, 5.15.0-1122.131~20.04.1 +56
CVSS:3.1/AV:L/AC:L/PR:L/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.
Patches and advisories
- ubuntu.com/security/notices/USN-8876-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8878-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8879-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8877-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8875-1 (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-8886-1 (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-8875-2 (opens in a new tab)
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 fixing this issue is available and should be applied. The fix is included in Linux kernel versions 5.15.0-1117.124~20.04.1 and later. Users should update their Linux kernel to these or newer versions to remediate the vulnerability. No additional mitigation steps are indicated by the vendor advisory.
Description
A flaw in the Linux kernel's sungem network driver caused duplicate resource cleanup during probe error handling, potentially leading to system instability or crashes. The issue was identified by static analysis and fixed by correcting the error cleanup path to avoid double freeing of resources. This vulnerability affects multiple Linux kernel versions prior to 5.15.0 updates and some older versions. The fix is available in updated kernel releases.
References
- ubuntu.com/security/CVE-2026-72406 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-72406 (opens in a new tab)
- git.kernel.org/linus/36dea2f639249460d13f6ca66b2a9064187cd34d (opens in a new tab)
- git.kernel.org/stable/c/331c99029a1cee1111f82f63d15b3cdebefbd341 (opens in a new tab)
- git.kernel.org/stable/c/36dea2f639249460d13f6ca66b2a9064187cd34d (opens in a new tab)
- git.kernel.org/stable/c/a63eaf7605d1579cf3f551792e478cfaf5ac37d1 (opens in a new tab)
- git.kernel.org/stable/c/b15a3cc68e2450aa0edd94a74a7bdd45fcc17dd9 (opens in a new tab)
- git.kernel.org/stable/c/bc49e8746584564dba47d963d1916cc876fc6f6b (opens in a new tab)
- git.kernel.org/stable/c/f1d04fefb0c2a2de32d9cee22cdc2088be3758d1 (opens in a new tab)
- git.kernel.org/stable/c/f3bd60b26814b7c3c57c629abb0857dfc76d214a (opens in a new tab)
- git.kernel.org/stable/c/fb73cdc50b6755e5c3a80a195b2708a39ada0230 (opens in a new tab)
- ubuntu.com/security/notices/USN-8876-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8878-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8879-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8877-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8875-1 (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-8886-1 (opens in a new tab)