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CVE-2026-97441· NVD / CVE Program· CNA Linux

ata: ahci: fail probe if BAR too small for claimed ports

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: 0.17% (FIRST EPSS).
  • Fixed version: Linux Linux 533a08ea11217100cec7a0ed903cb9b9c892d6f1, 6d29b91164424256a759ddabc8f2de1ae09bd3f1, c4086c6e1af757e1ff26fa2d2926b3ec0195de79; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.158.1-1.

Low priority for now. Upgrade to Linux Linux 533a08ea11217100cec7a0ed903cb9b9c892d6f1, 6d29b91164424256a759ddabc8f2de1ae09bd3f1, c4086c6e1af757e1ff26fa2d2926b3ec0195de79; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.158.1-1 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: ata: ahci: fail probe if BAR too small for claimed ports When an AHCI controller is disabled in BIOS, its HOST_CAP register may contain a bogus value, e.g. 0xFFFFFFFF. Since CAP.NP (Number of Ports) is a zeroes based 5-bit register field, a value of 0x1f means 32 ports. If CAP.NP claims more ports than can physically fit within the mapped BAR region, accessing port registers beyond the BAR boundary causes a kernel panic. Add validation in ahci_init_one() to check that the BAR size is sufficient for the number of ports claimed in CAP.NP. The check calculates the required MMIO size as: required_size = 0x100 (global registers) + max_ports * 0x80 If required_size exceeds the actual BAR size, the probe fails with -ENODEV, preventing the panic and providing a clear error message. [cassel: commit log]

—No exploit Fix available
Published
Sep 24, 2026
Updated
Oct 3, 2026
EPSS
0.1% · 6th 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 · 0.1%

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  • Not in KEV: no record of exploitation in the wild
  • 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

    • 2.6.12affected
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 533a08ea11217100cec7a0ed903cb9b9c892d6f1affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before c717b20100ef8cd06b5237af70ea2cb692e058ceaffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before ff0ab535f8febbd32afa5832f8d2d9b06a8d5060affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 6d29b91164424256a759ddabc8f2de1ae09bd3f1affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before df262c828b616450eb351349e91c63447551bd01affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before f2e291043c37a896d7f9797e25a356dceb030177affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before c4086c6e1af757e1ff26fa2d2926b3ec0195de79affected · git
    • before 2.6.12not affected · semver
    • 5.10.271 and later · up to and including 5.10.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.190-16.1.190-1
Debian:12linux-6.12before 6.12.111-1~deb12u16.12.111-1~deb12u1
Debian:13linuxbefore 6.12.111-16.12.111-1
Debian:14linuxbefore 7.2.6-17.2.6-1

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-2026-97439Sep 24, 2026 · fs/ntfs3: preserve non-DOS attribute bits in system.dos_attrib
    0Monitor
  • ← EarlierCVE-2026-97440Sep 24, 2026 · net: qrtr: fix node refcount leak on ctrl packet alloc failure
    0Monitor
  • Later →CVE-2026-97442Sep 24, 2026 · wifi: ath11k: fix invalid data access in ath11k_dp_rx_h_undecap_nwifi
    35Monitor

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 Linux533a08ea11217100cec7a0ed903cb9b9c892d6f1Vendor (CNA)
Linux Linux6d29b91164424256a759ddabc8f2de1ae09bd3f1Vendor (CNA)
Linux Linuxc4086c6e1af757e1ff26fa2d2926b3ec0195de79Vendor (CNA)
Linux Linuxc717b20100ef8cd06b5237af70ea2cb692e058ceVendor (CNA)
Linux Linuxdf262c828b616450eb351349e91c63447551bd01Vendor (CNA)
Linux Linuxf2e291043c37a896d7f9797e25a356dceb030177Vendor (CNA)
Linux Linuxff0ab535f8febbd32afa5832f8d2d9b06a8d5060Vendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.06.6.158.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.190-1 · Debian:12Package registry (OSV)
debian:linux6.12.111-1 · Debian:13Package registry (OSV)
debian:linux-6.126.12.111-1~deb12u1 · 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 (6 more)

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

All records