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NVD / CVE Program· CNA Linux

CVE-2026-68449: ata: sata_dwc_460ex: fix infinite loop in NCQ tag completion bit-scanning

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: 0.16% (FIRST EPSS).
  • Fixed version: Linux Linux 1842d45f461a78988254631893329bdf4596e954, 29b916d3556bd12a95be7c56ca391b8cd572f8be, 4c6e64cae2b2dab32ad9099faa339f6a72c0ce16.

Low priority for now. Upgrade to Linux Linux 1842d45f461a78988254631893329bdf4596e954, 29b916d3556bd12a95be7c56ca391b8cd572f8be, 4c6e64cae2b2dab32ad9099faa339f6a72c0ce16 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: sata_dwc_460ex: fix infinite loop in NCQ tag completion bit-scanning The hand-rolled bit-scanning loop in the NCQ completion path has an infinite loop bug. When tag_mask has only high bits set (e.g. 0x80000000), the inner while loop left-shifts tag_mask until it overflows to 0. At that point !(0 & 1) is always true and 0 <<= 1 stays 0, causing an infinite loop in hardirq context with a spinlock held. Replace the open-coded bit-scanning with __ffs() which correctly finds the least significant set bit and is bounded by the width of the argument.

—No exploit Fix available
Published
Aug 12, 2026
Updated
Oct 30, 2026
EPSS
0.1% · 5th 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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  • 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

    • 2.6.36affected
    • 62936009f35a6659cc3ebe0d90c754182d60da73 and later · before ea9fa4dabe476f85fe73df30a6ab61a23c22fda4affected · git
    • 62936009f35a6659cc3ebe0d90c754182d60da73 and later · before d72e8089dc332ac48293512ef0de77cbe0e04d25affected · git
    • 62936009f35a6659cc3ebe0d90c754182d60da73 and later · before 90e8cf489b593814b9398aa187ddbb790e33ec6faffected · git
    • 62936009f35a6659cc3ebe0d90c754182d60da73 and later · before 4c6e64cae2b2dab32ad9099faa339f6a72c0ce16affected · git
    • 62936009f35a6659cc3ebe0d90c754182d60da73 and later · before 8c5de0d8ab6824cfdadcbbe1be4c6c9d9f4c1f80affected · git
    • 62936009f35a6659cc3ebe0d90c754182d60da73 and later · before 1842d45f461a78988254631893329bdf4596e954affected · git
    • 62936009f35a6659cc3ebe0d90c754182d60da73 and later · before 29b916d3556bd12a95be7c56ca391b8cd572f8beaffected · git
    • 62936009f35a6659cc3ebe0d90c754182d60da73 and later · before c2130f6553f4a5cbdc259de069600117a995f197affected · git
    • before 2.6.36not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxfrom 0—
Debian:12linux-6.12before 6.12.101-1~deb12u16.12.101-1~deb12u1
Debian:13linuxbefore 6.12.101-16.12.101-1
Debian:14linuxbefore 7.1.6-17.1.6-1

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-2026-68447Aug 12, 2026 · drm/amdkfd: clamp v9 CRIU control stack checkpoint copy to BO size
    28Monitor
  • ← EarlierCVE-2026-68448Aug 12, 2026 · ovl: check access to copy_file_range source with src mounter creds
    0Monitor
  • Later →CVE-2026-68451Aug 13, 2026 · s390/zcrypt: Validate length for CCA ECC private key requests
    31Monitor

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 Linux1842d45f461a78988254631893329bdf4596e954Vendor (CNA)
Linux Linux29b916d3556bd12a95be7c56ca391b8cd572f8beVendor (CNA)
Linux Linux4c6e64cae2b2dab32ad9099faa339f6a72c0ce16Vendor (CNA)
Linux Linux8c5de0d8ab6824cfdadcbbe1be4c6c9d9f4c1f80Vendor (CNA)
Linux Linux90e8cf489b593814b9398aa187ddbb790e33ec6fVendor (CNA)
Linux Linuxc2130f6553f4a5cbdc259de069600117a995f197Vendor (CNA)
Linux Linuxd72e8089dc332ac48293512ef0de77cbe0e04d25Vendor (CNA)
Linux Linuxea9fa4dabe476f85fe73df30a6ab61a23c22fda4Vendor (CNA)
debian:linux6.12.101-1 · Debian:13Package registry (OSV)
debian:linux-6.126.12.101-1~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 (7 more)

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

All records