PT-2026-64683 · Linux · Linux

CVE-2026-64462 · Published 2026-07-25 · Updated 2026-07-25

Mitre

In the Linux kernel, the following vulnerability has been resolved:

PCI: altera: Fix resource leaks on probe failure

The chained IRQ handler is set during probe, but is only removed during the driver remove(). If pci host probe() fails, the handler and INTx IRQ domain remain set even though the devm-managed host bridge storage containing struct altera pcie will be released, leaving the handler with a stale data pointer.

Interrupts are also enabled before pci host probe() is called. If probe fails after that point, the controller interrupt source should be disabled before the chained handler and INTx domain are removed.

So set the chained handler only after the INTx domain has been created. Disable controller interrupts during IRQ teardown, and tear the IRQ setup down if pci host probe() fails.

[mani: commit log]

Related Identifiers

CVE-2026-64462

Affected Products

Linux

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2026-64462 · Security Note
• https://git.kernel.org/stable/c/6864c789b570e57f932847fa83f6b56917182d73 · Note
• https://git.kernel.org/stable/c/09c43b7b7d29c6fadb27f32cdf7f3bb6598befa9 · Note
• https://git.kernel.org/stable/c/9cf0cc481e1645ec65e61486ae41c486c59781cb · Note
• https://git.kernel.org/stable/c/af7cf5d56d7d57c4fbfdb7b5b693790f331b07b7 · Note
• https://git.kernel.org/stable/c/a25bfa2a6665a1d77324d4a609e7513b87680227 · Note
• https://git.kernel.org/stable/c/7a94138caeb27f3c49c1dbd93bf422098925bb28 · Note
• https://git.kernel.org/stable/c/0db9aa9ec51be0a0ffdcdfd9af2b7bf3aeb7911a · Note
• https://git.kernel.org/stable/c/99fc088d6cc6890ae35fa2f29c50ebe027844c20 · Note