CVE-2026-74272

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74272", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.879Z", "datePublished": "2026-08-15T05:57:45.494Z", "dateUpdated": "2026-10-21T12:45:14.105Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-21T12:45:14.105Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncxl/region: Resolve region deletion races\n\nSungwoo noticed that the sysfs trigger to delete a region may try to delete\na region multiple times. It also has no exclusion relative to the kernel\nreleasing the region via CXL root device teardown.\n\nInstead of installing new cxl root devres actions per region, use the\nexisting root decoder unregistration event to remove all remaining regions.\nAn xarray of regions replaces a devres list of regions.\n\nThis handles 3 separate issues with the old approach:\n\n1/ sysfs users racing to delete the same region: no longer possible now\n that the regions_lock is held over the lookup and deletion.\n\n2/ multiple actions triggering deletion of the same region: solved by\n erasing regions while holding @regions_lock, and only proceeding on\n successful erasure.\n\n3/ userspace racing devres_release_all() to trigger the devres not found\n warning: solved by sysfs unregistration not requiring a release action"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/cxl/core/core.h", "drivers/cxl/core/port.c", "drivers/cxl/core/region.c", "drivers/cxl/cxl.h"], "versions": [{"version": "779dd20cfb56c510f89877cca45529fa9f8bc450", "lessThan": "441250eea84608c6c2dbd7f00c61df32836ac97d", "status": "affected", "versionType": "git"}, {"version": "779dd20cfb56c510f89877cca45529fa9f8bc450", "lessThan": "c478810c4ce7216261fc1b6ca5180adcda26b1a1", "status": "affected", "versionType": "git"}, {"version": "779dd20cfb56c510f89877cca45529fa9f8bc450", "lessThan": "be44c1c04f85d7b7ac1c597a30b443bbd346acbd", "status": "affected", "versionType": "git"}, {"version": "779dd20cfb56c510f89877cca45529fa9f8bc450", "lessThan": "4dd86ca99ffcc413cbf79063fd9956ef54e0ca91", "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/cxl/core/core.h", "drivers/cxl/core/port.c", "drivers/cxl/core/region.c", "drivers/cxl/cxl.h"], "versions": [{"version": "6.0", "status": "affected"}, {"version": "0", "lessThan": "6.0", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.114", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "6.0", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.12.114"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/441250eea84608c6c2dbd7f00c61df32836ac97d"}, {"url": "https://git.kernel.org/stable/c/c478810c4ce7216261fc1b6ca5180adcda26b1a1"}, {"url": "https://git.kernel.org/stable/c/be44c1c04f85d7b7ac1c597a30b443bbd346acbd"}, {"url": "https://git.kernel.org/stable/c/4dd86ca99ffcc413cbf79063fd9956ef54e0ca91"}], "title": "cxl/region: Resolve region deletion races", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/cxl/core/core.h", "drivers/cxl/core/port.c", "drivers/cxl/core/region.c", "drivers/cxl/cxl.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "441250eea84608c6c2dbd7f00c61df32836ac97d", "status": "affected", "version": "779dd20cfb56c510f89877cca45529fa9f8bc450", "versionType": "git"}, {"lessThan": "c478810c4ce7216261fc1b6ca5180adcda26b1a1", "status": "affected", "version": "779dd20cfb56c510f89877cca45529fa9f8bc450", "versionType": "git"}, {"lessThan": "be44c1c04f85d7b7ac1c597a30b443bbd346acbd", "status": "affected", "version": "779dd20cfb56c510f89877cca45529fa9f8bc450", "versionType": "git"}, {"lessThan": "4dd86ca99ffcc413cbf79063fd9956ef54e0ca91", "status": "affected", "version": "779dd20cfb56c510f89877cca45529fa9f8bc450", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/cxl/core/core.h", "drivers/cxl/core/port.c", "drivers/cxl/core/region.c", "drivers/cxl/cxl.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.0"}, {"lessThan": "6.0", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.114", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "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\ncxl/region: Resolve region deletion races\n\nSungwoo noticed that the sysfs trigger to delete a region may try to delete\na region multiple times. It also has no exclusion relative to the kernel\nreleasing the region via CXL root device teardown.\n\nInstead of installing new cxl root devres actions per region, use the\nexisting root decoder unregistration event to remove all remaining regions.\nAn xarray of regions replaces a devres list of regions.\n\nThis handles 3 separate issues with the old approach:\n\n1/ sysfs users racing to delete the same region: no longer possible now\n that the regions_lock is held over the lookup and deletion.\n\n2/ multiple actions triggering deletion of the same region: solved by\n erasing regions while holding @regions_lock, and only proceeding on\n successful erasure.\n\n3/ userspace racing devres_release_all() to trigger the devres not found\n warning: solved by sysfs unregistration not requiring a release action"}], "id": "CVE-2026-74272", "lastModified": "2026-10-21T13:19:40.867", "metrics": {}, "published": "2026-08-15T06:22:26.597", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/441250eea84608c6c2dbd7f00c61df32836ac97d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4dd86ca99ffcc413cbf79063fd9956ef54e0ca91"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/be44c1c04f85d7b7ac1c597a30b443bbd346acbd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c478810c4ce7216261fc1b6ca5180adcda26b1a1"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: cxl/region: Resolve region deletion races", "id": "2516751", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516751"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-367", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ncxl/region: Resolve region deletion races\nSungwoo noticed that the sysfs trigger to delete a region may try to delete\na region multiple times. It also has no exclusion relative to the kernel\nreleasing the region via CXL root device teardown.\nInstead of installing new cxl root devres actions per region, use the\nexisting root decoder unregistration event to remove all remaining regions.\nAn xarray of regions replaces a devres list of regions.\nThis handles 3 separate issues with the old approach:\n1/ sysfs users racing to delete the same region: no longer possible now\nthat the regions_lock is held over the lookup and deletion.\n2/ multiple actions triggering deletion of the same region: solved by\nerasing regions while holding @regions_lock, and only proceeding on\nsuccessful erasure.\n3/ userspace racing devres_release_all() to trigger the devres not found\nwarning: solved by sysfs unregistration not requiring a release action", "A flaw was found in the Linux kernel's cxl/region module. Multiple race conditions exist during the deletion of CXL (Compute Express Link) regions. A local attacker could exploit these race conditions by repeatedly attempting to delete a region via the sysfs interface or by racing with kernel operations. This could lead to a denial of service (DoS) by preventing proper resource cleanup and potentially causing system instability."], "name": "CVE-2026-74272", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-74272\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-74272\nhttps://lore.kernel.org/linux-cve-announce/2026081544-CVE-2026-74272-eb1a@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[779dd20cfb56c510f89877cca45529fa9f8bc450,be44c1c04f85d7b7ac1c597a30b443bbd346acbd)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[779dd20cfb56c510f89877cca45529fa9f8bc450,4dd86ca99ffcc413cbf79063fd9956ef54e0ca91)"}}], "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": "6.0"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2-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": "2026-08-15T17:15:03.021329+00:00", "updated": "2026-08-22T05:00:13.395432+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}