Linux Kernel up to 7.1.3 altera pci_host_probe memory leak

CVSS Meta Temp Score
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CTI Interest Score
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7.8$0-$5k2.33-

Summaryinfo

A vulnerability classified as very critical has been found in Linux Kernel up to 7.1.3. This impacts the function pci_host_probe of the component altera. The manipulation leads to memory leak. This vulnerability is traded as CVE-2026-64462. An attack has to be approached locally. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as very critical, has been found in Linux Kernel up to 7.1.3. This issue affects the function pci_host_probe of the component altera. The manipulation with an unknown input leads to a memory leak vulnerability. Using CWE to declare the problem leads to CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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]

The advisory is shared at git.kernel.org. The identification of this vulnerability is CVE-2026-64462 since 07/19/2026. The exploitation is known to be easy. An attack has to be approached locally. Additional levels of successful authentication are needed for exploitation. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/25/2026).

Upgrading to version 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.97, 6.18.39, 7.1.4 or 7.2-rc1 eliminates this vulnerability. Applying the patch af7cf5d56d7d57c4fbfdb7b5b693790f331b07b7/9cf0cc481e1645ec65e61486ae41c486c59781cb/99fc088d6cc6890ae35fa2f29c50ebe027844c20/a25bfa2a6665a1d77324d4a609e7513b87680227/0db9aa9ec51be0a0ffdcdfd9af2b7bf3aeb7911a/09c43b7b7d29c6fadb27f32cdf7f3bb6598befa9/6864c789b570e57f932847fa83f6b56917182d73/7a94138caeb27f3c49c1dbd93bf422098925bb28 is able to eliminate this problem.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.2
VulDB Meta Temp Score: 7.8

VulDB Base Score: 8.2
VulDB Temp Score: 7.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Memory leak
CWE: CWE-401 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.10.261/5.15.212/6.1.178/6.6.145/6.12.97/6.18.39/7.1.4/7.2-rc1
Patch: af7cf5d56d7d57c4fbfdb7b5b693790f331b07b7/9cf0cc481e1645ec65e61486ae41c486c59781cb/99fc088d6cc6890ae35fa2f29c50ebe027844c20/a25bfa2a6665a1d77324d4a609e7513b87680227/0db9aa9ec51be0a0ffdcdfd9af2b7bf3aeb7911a/09c43b7b7d29c6fadb27f32cdf7f3bb6598befa9/6864c789b570e57f932847fa83f6b56917182d73/7a94138caeb27f3c49c1dbd93bf422098925bb28

Timelineinfo

07/19/2026 CVE reserved
07/25/2026 +6 days Advisory disclosed
07/25/2026 +0 days VulDB entry created
07/25/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-64462 (🔒)
GCVE (CVE): GCVE-0-2026-64462
GCVE (VulDB): GCVE-100-383249

Entryinfo

Created: 07/25/2026 18:53
Changes: 07/25/2026 18:53 (59)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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