CVE-2026-93040 (GCVE-0-2026-93040)
Vulnerability from cvelistv5
Published
2026-09-17 16:10
Modified
2026-10-19 09:04
Severity ?
Summary
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf
Version: e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf
Version: e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf
Version: e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf
Version: e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf
Version: e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf
Version: e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf
Version: e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/dma/dw-edma/dw-edma-core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "be0072af8ce6e9458cc586e0e8b41a251e7d4316",
              "status": "affected",
              "version": "e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf",
              "versionType": "git"
            },
            {
              "lessThan": "2d76b91deeab973dd8a8c2ee587ce27f881de768",
              "status": "affected",
              "version": "e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf",
              "versionType": "git"
            },
            {
              "lessThan": "3001cfcee30dcc81f8b3774319c12067f126e49a",
              "status": "affected",
              "version": "e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf",
              "versionType": "git"
            },
            {
              "lessThan": "b6293a8a38f4d5866ce1a264c138265a02e4c53a",
              "status": "affected",
              "version": "e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf",
              "versionType": "git"
            },
            {
              "lessThan": "da16a02f0998a0d455ce6265b836b29ad92e6e58",
              "status": "affected",
              "version": "e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf",
              "versionType": "git"
            },
            {
              "lessThan": "fe0ffa0190e862ed71e8c1a476090f648c9cb7d9",
              "status": "affected",
              "version": "e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf",
              "versionType": "git"
            },
            {
              "lessThan": "6fc436e1500c5e4f0dde2a3dbadf6d898057be8f",
              "status": "affected",
              "version": "e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf",
              "versionType": "git"
            },
            {
              "lessThan": "f7d1619f3e10c619b62c6cd6d95371b5c526c85a",
              "status": "affected",
              "version": "e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/dma/dw-edma/dw-edma-core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.3"
            },
            {
              "lessThan": "5.3",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.270",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.221",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.188",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.157",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.110",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.52",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.6",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: dw-edma: Serialize channel state checks\n\npause() and resume() read and update channel state without holding vc.lock,\nwhile the interrupt handlers update the same state under it. Take the same\nlock around those state checks so that request, status, and configured stay\nconsistent.\n\nFor example, pause() can observe EDMA_ST_BUSY right before the interrupt\nhandler completes the final descriptor and moves the channel to\nEDMA_ST_IDLE, and then record EDMA_REQ_PAUSE on an already idle channel. No\nfurther interrupt will acknowledge the request, and since issue_pending()\nrequires EDMA_REQ_NONE, the channel is wedged for good: terminate_all()\nleaves the stale request behind, so even reconfiguring the channel does not\nrecover it.\n\nissue_pending() already runs under vc.lock, but it tests configured before\ntaking it. Move that test under the lock as well, so configured, request,\nand status are evaluated as one channel-state snapshot."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:04:35.266Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/be0072af8ce6e9458cc586e0e8b41a251e7d4316"
        },
        {
          "url": "https://git.kernel.org/stable/c/2d76b91deeab973dd8a8c2ee587ce27f881de768"
        },
        {
          "url": "https://git.kernel.org/stable/c/3001cfcee30dcc81f8b3774319c12067f126e49a"
        },
        {
          "url": "https://git.kernel.org/stable/c/b6293a8a38f4d5866ce1a264c138265a02e4c53a"
        },
        {
          "url": "https://git.kernel.org/stable/c/da16a02f0998a0d455ce6265b836b29ad92e6e58"
        },
        {
          "url": "https://git.kernel.org/stable/c/fe0ffa0190e862ed71e8c1a476090f648c9cb7d9"
        },
        {
          "url": "https://git.kernel.org/stable/c/6fc436e1500c5e4f0dde2a3dbadf6d898057be8f"
        },
        {
          "url": "https://git.kernel.org/stable/c/f7d1619f3e10c619b62c6cd6d95371b5c526c85a"
        }
      ],
      "title": "dmaengine: dw-edma: Serialize channel state checks",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-93040",
    "datePublished": "2026-09-17T16:10:33.499Z",
    "dateReserved": "2026-09-17T15:57:05.657Z",
    "dateUpdated": "2026-10-19T09:04:35.266Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.