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CVE-2026-93040· NVD / CVE Program· CNA Linux

dmaengine: dw-edma: Serialize channel state checks

In the Linux kernel, the following vulnerability has been resolved: dmaengine: dw-edma: Serialize channel state checks pause() and resume() read and update channel state without holding vc.lock, while the interrupt handlers update the same state under it. Take the same lock around those state checks so that request, status, and configured stay consistent. For example, pause() can observe EDMA_ST_BUSY right before the interrupt handler completes the final descriptor and moves the channel to EDMA_ST_IDLE, and then record EDMA_REQ_PAUSE on an already idle channel. No further interrupt will acknowledge the request, and since issue_pending() requires EDMA_REQ_NONE, the channel is wedged for good: terminate_all() leaves the stale request behind, so even reconfiguring the channel does not recover it. issue_pending() already runs under vc.lock, but it tests configured before taking it. Move that test under the lock as well, so configured, request, and status are evaluated as one channel-state snapshot.

—No exploit Fix available
Published
Sep 17, 2026
Updated
Sep 17, 2026
EPSS
0.2% · 11th percentile
CWE
—
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Action score

0

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Low priority for now.

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

Noroxi analysis

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Affected systems

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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

    • 5.3affected
    • e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf and later · before be0072af8ce6e9458cc586e0e8b41a251e7d4316affected · git
    • e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf and later · before 2d76b91deeab973dd8a8c2ee587ce27f881de768affected · git
    • e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf and later · before 3001cfcee30dcc81f8b3774319c12067f126e49aaffected · git
    • e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf and later · before b6293a8a38f4d5866ce1a264c138265a02e4c53aaffected · git
    • e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf and later · before da16a02f0998a0d455ce6265b836b29ad92e6e58affected · git
    • e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf and later · before fe0ffa0190e862ed71e8c1a476090f648c9cb7d9affected · git
    • e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf and later · before 6fc436e1500c5e4f0dde2a3dbadf6d898057be8faffected · git
    • e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf and later · before f7d1619f3e10c619b62c6cd6d95371b5c526c85aaffected · git
    • before 5.3not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxall versions—
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
  • CVE-2026-74309vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
    40Plan
  • CVE-2026-74280crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
    40Plan
  • CVE-2026-74279crypto: cavium/cpt - fix DMA cleanup using wrong loop index
    40Plan

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 Linux2d76b91deeab973dd8a8c2ee587ce27f881de768Vendor (CNA)
Linux Linux3001cfcee30dcc81f8b3774319c12067f126e49aVendor (CNA)
Linux Linux6fc436e1500c5e4f0dde2a3dbadf6d898057be8fVendor (CNA)
Linux Linuxb6293a8a38f4d5866ce1a264c138265a02e4c53aVendor (CNA)
Linux Linuxbe0072af8ce6e9458cc586e0e8b41a251e7d4316Vendor (CNA)
Linux Linuxda16a02f0998a0d455ce6265b836b29ad92e6e58Vendor (CNA)
Linux Linuxf7d1619f3e10c619b62c6cd6d95371b5c526c85aVendor (CNA)
Linux Linuxfe0ffa0190e862ed71e8c1a476090f648c9cb7d9Vendor (CNA)
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.

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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)

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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

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

All records