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NVD / CVE Program· CNA Linux

CVE-2026-80867: alpha/PCI: Add security_locked_down() check to pci_mmap_resource()

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.22% (FIRST EPSS).
  • Fixed version: Linux Linux 257b55dc3d18d7ef01f62a8ff7317871f7597e28, 4de5ff924c0a8ef8166c1a68af9087826e1e8d61, 6e368485a1ac19fbde0a8b6a332d4545ae72a8ac.

Low priority for now. Upgrade to Linux Linux 257b55dc3d18d7ef01f62a8ff7317871f7597e28, 4de5ff924c0a8ef8166c1a68af9087826e1e8d61, 6e368485a1ac19fbde0a8b6a332d4545ae72a8ac or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: alpha/PCI: Add security_locked_down() check to pci_mmap_resource() Currently, Alpha's pci_mmap_resource() does not check security_locked_down(LOCKDOWN_PCI_ACCESS) before allowing userspace to mmap PCI BARs. The generic version has had this check since commit eb627e17727e ("PCI: Lock down BAR access when the kernel is locked down") to prevent DMA attacks when the kernel is locked down. Add the same check to Alpha's pci_mmap_resource().

—No exploit Fix available
Published
Sep 4, 2026
Updated
Sep 4, 2026
EPSS
0.2% · 12th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

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  • No public exploit code on record
  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 5.4affected
    • eb627e17727ebeede70697ae1798688b0d328b54 and later · before 6e368485a1ac19fbde0a8b6a332d4545ae72a8acaffected · git
    • eb627e17727ebeede70697ae1798688b0d328b54 and later · before ed2cd1fee0ed16a1c2dff49175e65c641eb8ae2baffected · git
    • eb627e17727ebeede70697ae1798688b0d328b54 and later · before c3234efe21d4198945492cf7dba6859476f0f6ffaffected · git
    • eb627e17727ebeede70697ae1798688b0d328b54 and later · before 4de5ff924c0a8ef8166c1a68af9087826e1e8d61affected · git
    • eb627e17727ebeede70697ae1798688b0d328b54 and later · before 85f966b1120874fe530edec50d28373ceb06ebcdaffected · git
    • eb627e17727ebeede70697ae1798688b0d328b54 and later · before 94defb18ac792fd16407d5a52ad0d3f5055c4b43affected · git
    • eb627e17727ebeede70697ae1798688b0d328b54 and later · before 257b55dc3d18d7ef01f62a8ff7317871f7597e28affected · git
    • eb627e17727ebeede70697ae1798688b0d328b54 and later · before 78a228f0aa0e9eba31955950c8a40a9945e2c8bbaffected · git
    • before 5.4not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.180-16.1.180-1
Debian:13linuxbefore 6.12.100-16.12.100-1
Debian:14linuxbefore 7.1.5-17.1.5-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-80820Sep 4, 2026 · xfs: don't livelock in scrub on a circular unlinked list
    0Monitor
  • ← EarlierCVE-2026-80865Sep 4, 2026 · bpf: Add missing access_ok call to copy_user_syms
    0Monitor
  • Later →CVE-2026-80868Sep 4, 2026 · ntfs3: Allocate iomap inline_data using alloc_page
    0Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux257b55dc3d18d7ef01f62a8ff7317871f7597e28Vendor (CNA)
Linux Linux4de5ff924c0a8ef8166c1a68af9087826e1e8d61Vendor (CNA)
Linux Linux6e368485a1ac19fbde0a8b6a332d4545ae72a8acVendor (CNA)
Linux Linux78a228f0aa0e9eba31955950c8a40a9945e2c8bbVendor (CNA)
Linux Linux85f966b1120874fe530edec50d28373ceb06ebcdVendor (CNA)
Linux Linux94defb18ac792fd16407d5a52ad0d3f5055c4b43Vendor (CNA)
Linux Linuxc3234efe21d4198945492cf7dba6859476f0f6ffVendor (CNA)
Linux Linuxed2cd1fee0ed16a1c2dff49175e65c641eb8ae2bVendor (CNA)
debian:linux6.1.180-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

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References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records