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CVE-2026-64462— PCI: altera: Fix resource leaks on probe failure

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel 5.9版本存在安全漏洞，该漏洞源于PCI altera驱动在探测失败时未正确清理链式IRQ处理程序和INTx IRQ域，可能导致空指针取消引用。

AI Predicted 5.5 Difficulty: Theoretical EPSS 0.18% · P8

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux c63aed7334c21de8d626ff028ccad98cf5847a0e< af7cf5d56d7d57c4fbfdb7b5b693790f331b07b7 affected
c63aed7334c21de8d626ff028ccad98cf5847a0e< 9cf0cc481e1645ec65e61486ae41c486c59781cb affected
c63aed7334c21de8d626ff028ccad98cf5847a0e< 99fc088d6cc6890ae35fa2f29c50ebe027844c20 affected
c63aed7334c21de8d626ff028ccad98cf5847a0e< a25bfa2a6665a1d77324d4a609e7513b87680227 affected
c63aed7334c21de8d626ff028ccad98cf5847a0e< 0db9aa9ec51be0a0ffdcdfd9af2b7bf3aeb7911a affected
c63aed7334c21de8d626ff028ccad98cf5847a0e< 09c43b7b7d29c6fadb27f32cdf7f3bb6598befa9 affected
c63aed7334c21de8d626ff028ccad98cf5847a0e< 6864c789b570e57f932847fa83f6b56917182d73 affected
c63aed7334c21de8d626ff028ccad98cf5847a0e< 7a94138caeb27f3c49c1dbd93bf422098925bb28 affected
… +10 more rows
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I. Basic Information for CVE-2026-64462

Vulnerability Information
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Vulnerability Title
PCI: altera: Fix resource leaks on probe failure
Source: CVE Program / CVE List V5
Vulnerability Description
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]
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel 5.9版本存在安全漏洞，该漏洞源于PCI altera驱动在探测失败时未正确清理链式IRQ处理程序和INTx IRQ域，可能导致空指针取消引用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux c63aed7334c21de8d626ff028ccad98cf5847a0e ~ af7cf5d56d7d57c4fbfdb7b5b693790f331b07b7 -
Linux Linux 5.9 -

II. Public POCs for CVE-2026-64462

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III. Intelligence Information for CVE-2026-64462

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Patches & Fixes for CVE-2026-64462 (8)

Same Patch Batch · Linux · 2026-07-25 · 274 CVEs total

CVE-2026-64355 9.8 CRITICAL bpf: Reject fragmented frames in devmap
CVE-2026-64459 9.8 CRITICAL tcp: restore RCU grace period in tcp_ao_destroy_sock
CVE-2026-64303 9.8 CRITICAL spi: fsl-lpspi: terminate the RX channel on TX prepare failure path
CVE-2026-64439 9.8 CRITICAL crypto: krb5 - filter out async aead implementations at alloc
CVE-2026-64410 9.8 CRITICAL netfilter: flowtable: IPIP tunnel hardware offload is not yet support
CVE-2026-64399 9.8 CRITICAL ksmbd: add permission checks for FSCTL_DUPLICATE_EXTENTS_TO_FILE
CVE-2026-64397 9.8 CRITICAL ksmbd: serialize QUERY_DIRECTORY requests per file
CVE-2026-64391 9.8 CRITICAL ksmbd: use opener credentials for ADS I/O
CVE-2026-64387 9.8 CRITICAL smb: client: fix query directory replay double-free
CVE-2026-64386 9.8 CRITICAL smb: client: fix query_info() replay double-free
CVE-2026-64385 9.8 CRITICAL smb: client: fix double-free in SMB2_ioctl() replay
CVE-2026-64383 9.8 CRITICAL smb: client: fix double-free in SMB2_flush() replay
CVE-2026-64384 9.8 CRITICAL smb: client: fix change notify replay double-free
CVE-2026-64268 9.8 CRITICAL RDMA/siw: bound Read Response placement to the RREAD length
CVE-2026-64523 9.8 CRITICAL net/handshake: Take a long-lived file reference at submit
CVE-2026-64269 9.1 CRITICAL RDMA/rtrs-srv: Bound RDMA-Write length to chunk size in rdma_write_sg
CVE-2026-64257 9.1 CRITICAL smb: client: reject overlapping data areas in SMB2 responses
CVE-2026-64319 9.1 CRITICAL nvmet-auth: validate reply message payload bounds against transfer length
CVE-2026-64320 9.1 CRITICAL nvmet: fix pre-auth out-of-bounds heap read in Discovery Get Log Page
CVE-2026-64393 9.1 CRITICAL ksmbd: run set info with opener credentials

Showing top 20 of 274 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-64462

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