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 26 Oct 2026, 14:05 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 +41
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-azure kernel versions to resolve the BAR resource leak. Users should update to the fixed versions listed by their distribution. No additional mitigation is indicated by the vendor advisory.
Description
A resource leak vulnerability was identified and fixed in the Linux kernel's liquidio network driver used in the linux-azure distribution. The issue occurs when the function cn23xx_get_pf_num() fails and returns without unmapping either Base Address Registers (BARs), causing a resource leak. This flaw was found through manual code review and has been addressed in patched versions.
References
- nvd.nist.gov/vuln/detail/CVE-2026-72038 (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/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)
- 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)