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 26 Oct 2026, 13:47 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- 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 +42
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.
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 resolve the issue. The vendor advisory confirms the fix is included in updated kernel releases. No additional mitigation steps are specified or required beyond applying the official patch.
Description
A vulnerability in the Linux kernel's sungem network driver was resolved involving improper cleanup during probe error handling. The flaw caused double freeing of resources when register_netdev() failed, potentially leading to system instability or crashes. The issue was identified by static analysis and fixed by adjusting the cleanup sequence to avoid double free. The vulnerability affects specific Linux kernel versions listed and has a CVSS score of 7.8. A patch is available to address this issue.
References
- nvd.nist.gov/vuln/detail/CVE-2026-72406 (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/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)
- 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)