CVE-2026-93049

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-93049", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-17T15:57:05.658Z", "datePublished": "2026-09-17T16:10:39.679Z", "dateUpdated": "2026-10-19T09:04:44.322Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:04:44.322Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmtd: mtdswap: Avoid freeing registered blktrans device twice\n\nIn mtdswap_add_mtd(), debugfs setup failure after successful blktrans\nregistration can free mbd_dev twice.\n\nadd_mtd_blktrans_dev() initializes the blktrans device reference and\npublishes the disk. Once that succeeds, del_mtd_blktrans_dev() tears the\ndisk down and drops the blktrans reference; when that reference reaches\nzero, blktrans_dev_release() frees the mtd_blktrans_dev.\n\nThe debugfs failure path called del_mtd_blktrans_dev(mbd_dev), then fell\nthrough the common cleanup label and called kfree(mbd_dev) again. Clear\nthe local pointer after deregistration so the common cleanup can still\nrelease the mtdswap state without freeing the blktrans object twice.\n\nThis issue was found by a static analysis checker and confirmed by\nmanual source review."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/mtd/mtdswap.c"], "versions": [{"version": "e8e3edb95ce6a146bc774b6cfad3553f4383edc8", "lessThan": "ecadb9137aeaa0615183f8d23eabea2b45c862f1", "status": "affected", "versionType": "git"}, {"version": "e8e3edb95ce6a146bc774b6cfad3553f4383edc8", "lessThan": "eec130fc9ffbbd08a5d5432683122b79aca2a726", "status": "affected", "versionType": "git"}, {"version": "e8e3edb95ce6a146bc774b6cfad3553f4383edc8", "lessThan": "d5086911d532b82ca070d944aa08ddde00baefe4", "status": "affected", "versionType": "git"}, {"version": "e8e3edb95ce6a146bc774b6cfad3553f4383edc8", "lessThan": "0ce48c6ddea1a8e675a2eb0221b62a9950788f3c", "status": "affected", "versionType": "git"}, {"version": "e8e3edb95ce6a146bc774b6cfad3553f4383edc8", "lessThan": "a82d93fcfdfd26af17049c34319dfdd079cd1901", "status": "affected", "versionType": "git"}, {"version": "e8e3edb95ce6a146bc774b6cfad3553f4383edc8", "lessThan": "5c349c533e72af2313c3be0f80a24d7407fa4777", "status": "affected", "versionType": "git"}, {"version": "e8e3edb95ce6a146bc774b6cfad3553f4383edc8", "lessThan": "37be7bc2c2d09c18e939da20224405864a0090b9", "status": "affected", "versionType": "git"}, {"version": "e8e3edb95ce6a146bc774b6cfad3553f4383edc8", "lessThan": "779aa4c66a96bf43d2d62982ea1a9096a9128d87", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/mtd/mtdswap.c"], "versions": [{"version": "4.14", "status": "affected"}, {"version": "0", "lessThan": "4.14", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.270", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.221", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.52", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.6", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "5.10.270"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "5.15.221"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.1.188"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.12.110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.18.52"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "7.2.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ecadb9137aeaa0615183f8d23eabea2b45c862f1"}, {"url": "https://git.kernel.org/stable/c/eec130fc9ffbbd08a5d5432683122b79aca2a726"}, {"url": "https://git.kernel.org/stable/c/d5086911d532b82ca070d944aa08ddde00baefe4"}, {"url": "https://git.kernel.org/stable/c/0ce48c6ddea1a8e675a2eb0221b62a9950788f3c"}, {"url": "https://git.kernel.org/stable/c/a82d93fcfdfd26af17049c34319dfdd079cd1901"}, {"url": "https://git.kernel.org/stable/c/5c349c533e72af2313c3be0f80a24d7407fa4777"}, {"url": "https://git.kernel.org/stable/c/37be7bc2c2d09c18e939da20224405864a0090b9"}, {"url": "https://git.kernel.org/stable/c/779aa4c66a96bf43d2d62982ea1a9096a9128d87"}], "title": "mtd: mtdswap: Avoid freeing registered blktrans device twice", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/mtd/mtdswap.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "ecadb9137aeaa0615183f8d23eabea2b45c862f1", "status": "affected", "version": "e8e3edb95ce6a146bc774b6cfad3553f4383edc8", "versionType": "git"}, {"lessThan": "eec130fc9ffbbd08a5d5432683122b79aca2a726", "status": "affected", "version": "e8e3edb95ce6a146bc774b6cfad3553f4383edc8", "versionType": "git"}, {"lessThan": "d5086911d532b82ca070d944aa08ddde00baefe4", "status": "affected", "version": "e8e3edb95ce6a146bc774b6cfad3553f4383edc8", "versionType": "git"}, {"lessThan": "0ce48c6ddea1a8e675a2eb0221b62a9950788f3c", "status": "affected", "version": "e8e3edb95ce6a146bc774b6cfad3553f4383edc8", "versionType": "git"}, {"lessThan": "a82d93fcfdfd26af17049c34319dfdd079cd1901", "status": "affected", "version": "e8e3edb95ce6a146bc774b6cfad3553f4383edc8", "versionType": "git"}, {"lessThan": "5c349c533e72af2313c3be0f80a24d7407fa4777", "status": "affected", "version": "e8e3edb95ce6a146bc774b6cfad3553f4383edc8", "versionType": "git"}, {"lessThan": "37be7bc2c2d09c18e939da20224405864a0090b9", "status": "affected", "version": "e8e3edb95ce6a146bc774b6cfad3553f4383edc8", "versionType": "git"}, {"lessThan": "779aa4c66a96bf43d2d62982ea1a9096a9128d87", "status": "affected", "version": "e8e3edb95ce6a146bc774b6cfad3553f4383edc8", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/mtd/mtdswap.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.14"}, {"lessThan": "4.14", "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"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmtd: mtdswap: Avoid freeing registered blktrans device twice\n\nIn mtdswap_add_mtd(), debugfs setup failure after successful blktrans\nregistration can free mbd_dev twice.\n\nadd_mtd_blktrans_dev() initializes the blktrans device reference and\npublishes the disk. Once that succeeds, del_mtd_blktrans_dev() tears the\ndisk down and drops the blktrans reference; when that reference reaches\nzero, blktrans_dev_release() frees the mtd_blktrans_dev.\n\nThe debugfs failure path called del_mtd_blktrans_dev(mbd_dev), then fell\nthrough the common cleanup label and called kfree(mbd_dev) again. Clear\nthe local pointer after deregistration so the common cleanup can still\nrelease the mtdswap state without freeing the blktrans object twice.\n\nThis issue was found by a static analysis checker and confirmed by\nmanual source review."}], "id": "CVE-2026-93049", "lastModified": "2026-10-19T10:16:54.677", "metrics": {}, "published": "2026-09-17T17:17:58.223", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0ce48c6ddea1a8e675a2eb0221b62a9950788f3c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/37be7bc2c2d09c18e939da20224405864a0090b9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5c349c533e72af2313c3be0f80a24d7407fa4777"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/779aa4c66a96bf43d2d62982ea1a9096a9128d87"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a82d93fcfdfd26af17049c34319dfdd079cd1901"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d5086911d532b82ca070d944aa08ddde00baefe4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ecadb9137aeaa0615183f8d23eabea2b45c862f1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/eec130fc9ffbbd08a5d5432683122b79aca2a726"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e8e3edb95ce6a146bc774b6cfad3553f4383edc8,ecadb9137aeaa0615183f8d23eabea2b45c862f1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e8e3edb95ce6a146bc774b6cfad3553f4383edc8,eec130fc9ffbbd08a5d5432683122b79aca2a726)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e8e3edb95ce6a146bc774b6cfad3553f4383edc8,d5086911d532b82ca070d944aa08ddde00baefe4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e8e3edb95ce6a146bc774b6cfad3553f4383edc8,0ce48c6ddea1a8e675a2eb0221b62a9950788f3c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e8e3edb95ce6a146bc774b6cfad3553f4383edc8,a82d93fcfdfd26af17049c34319dfdd079cd1901)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e8e3edb95ce6a146bc774b6cfad3553f4383edc8,5c349c533e72af2313c3be0f80a24d7407fa4777)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e8e3edb95ce6a146bc774b6cfad3553f4383edc8,37be7bc2c2d09c18e939da20224405864a0090b9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e8e3edb95ce6a146bc774b6cfad3553f4383edc8,779aa4c66a96bf43d2d62982ea1a9096a9128d87)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "4.14"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,4.14)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.270,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.221,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.188,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.157,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.110,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.52,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.6,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-19T07:00:11.405272+00:00", "updated": "2026-09-19T17:15:04.622972+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-415"]}