CVE-2026-72038: Linux kernel · net: liquidio: fix BAR resource leak on PF number failure
Affects Linux kernelSource GCVE Database
Not known to be exploited · fixed in 5.15.0-1117.124~20.04.1 : update Linux kernel when convenient.
Data as of 28 Oct 2026, 05:11 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 12% 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 +55
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.
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-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)
- ubuntu.com/security/notices/USN-8887-3 (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 is available and has been applied in the fixed Linux kernel versions listed. Users should update to one of the fixed versions to remediate this vulnerability. No additional mitigation actions are required beyond applying the official fixes.
Description
A resource leak vulnerability was identified and fixed in the Linux kernel's liquidio network driver. The issue occurs when the function cn23xx_get_pf_num() fails, causing the function to return without unmapping BAR resources, leading to a BAR resource leak. This flaw was discovered through manual code review and has been addressed in updated kernel versions.
References
- ubuntu.com/security/CVE-2026-72038 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-72038 (opens in a new tab)
- git.kernel.org/linus/c63ee62a3c4ac1a1542f4c1a4b87e2f41df5a496 (opens in a new tab)
- git.kernel.org/stable/c/020e52aee732bb08e6b89dd02bbf88895a50fffd (opens in a new tab)
- git.kernel.org/stable/c/4140c516473a0e116ab3a73f9320c2aa5800210b (opens in a new tab)
- git.kernel.org/stable/c/4a45884566bab4122bbeb8fff7d2d6b5fdbded24 (opens in a new tab)
- git.kernel.org/stable/c/715cce38424fb2488ef2c5e6e6ffbfe1b74a9e67 (opens in a new tab)
- git.kernel.org/stable/c/75b924759de9427761115301308c137904aa3f99 (opens in a new tab)
- git.kernel.org/stable/c/a22103618ee5b6ee884c374351f65fcdff7248f0 (opens in a new tab)
- git.kernel.org/stable/c/b74f293e5f38052cfa14710abfacd6b6561cc2d6 (opens in a new tab)
- git.kernel.org/stable/c/c63ee62a3c4ac1a1542f4c1a4b87e2f41df5a496 (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-8888-2 (opens in a new tab)