CVE-2026-64462: Linux kernel · PCI: altera: Fix resource leaks on probe 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, 11:50 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
- 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 +58
Exploitation evidence
Disclosed: evidence found.
CVE published 25 Jul 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-8726-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8727-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8728-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8760-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8726-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8726-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-8800-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8760-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8728-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8726-4 (opens in a new tab)
- ubuntu.com/security/notices/USN-8728-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-8876-1 (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 fix is available and included in Linux kernel versions 5.15.0-1117.124~20.04.1 and later. Users should update to these fixed kernel versions or later to remediate the vulnerability. No additional mitigation actions are required beyond applying the official patch.
Description
A resource leak vulnerability was fixed in the Linux kernel's PCI Altera driver related to improper handling of chained IRQ handlers during probe failure. The issue occurs because the chained IRQ handler is set during probe but only removed during driver removal, leading to stale pointers and enabled interrupts if pci_host_probe() fails. The fix involves setting the chained handler only after the INTx domain is created and disabling controller interrupts during IRQ teardown on probe failure.
References
- ubuntu.com/security/CVE-2026-64462 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-64462 (opens in a new tab)
- git.kernel.org/linus/7a94138caeb27f3c49c1dbd93bf422098925bb28 (opens in a new tab)
- git.kernel.org/stable/c/09c43b7b7d29c6fadb27f32cdf7f3bb6598befa9 (opens in a new tab)
- git.kernel.org/stable/c/0db9aa9ec51be0a0ffdcdfd9af2b7bf3aeb7911a (opens in a new tab)
- git.kernel.org/stable/c/6864c789b570e57f932847fa83f6b56917182d73 (opens in a new tab)
- git.kernel.org/stable/c/7a94138caeb27f3c49c1dbd93bf422098925bb28 (opens in a new tab)
- git.kernel.org/stable/c/99fc088d6cc6890ae35fa2f29c50ebe027844c20 (opens in a new tab)
- git.kernel.org/stable/c/9cf0cc481e1645ec65e61486ae41c486c59781cb (opens in a new tab)
- git.kernel.org/stable/c/a25bfa2a6665a1d77324d4a609e7513b87680227 (opens in a new tab)
- git.kernel.org/stable/c/af7cf5d56d7d57c4fbfdb7b5b693790f331b07b7 (opens in a new tab)
- ubuntu.com/security/notices/USN-8726-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8727-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8728-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8760-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8726-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8726-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-8800-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8760-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8728-2 (opens in a new tab)