CVE-2026-90270

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-90270", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.797Z", "datePublished": "2026-09-17T16:08:04.648Z", "dateUpdated": "2026-10-19T09:00:47.928Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:00:47.928Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\narm_mpam: Disable driver unbind to avoid UAF\n\nWhen a user unbinds an MSC and that MSC is the only MSC left for a\ncomponent then the corresponding mpam_component will be freed. If the user\nthen goes on to read the schemata file in the resctrl filesystem then the\nmpam_component will be accessed from resctrl_arch_get_config() leading to a\nuse after free.\n\nAs the MPAM driver is not a module the unbind sysfs interface is the only\nway to trigger the remove. Instead of dealing with the complexity of\nallowing some unused MSC to unbind just remove the unbind sysfs interface."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/resctrl/mpam_devices.c"], "versions": [{"version": "f04046f2577a5c76167333ca99d3903ee5331ba0", "lessThan": "7d199b6a0651abad3ca6d0877dbedbe8fe6ea9e2", "status": "affected", "versionType": "git"}, {"version": "f04046f2577a5c76167333ca99d3903ee5331ba0", "lessThan": "bb1a0f582d519c0461b0940116e2b52c5ba31459", "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/resctrl/mpam_devices.c"], "versions": [{"version": "6.19", "status": "affected"}, {"version": "0", "lessThan": "6.19", "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": "6.19", "versionEndExcluding": "7.2.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/7d199b6a0651abad3ca6d0877dbedbe8fe6ea9e2"}, {"url": "https://git.kernel.org/stable/c/bb1a0f582d519c0461b0940116e2b52c5ba31459"}], "title": "arm_mpam: Disable driver unbind to avoid UAF", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/resctrl/mpam_devices.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "7d199b6a0651abad3ca6d0877dbedbe8fe6ea9e2", "status": "affected", "version": "f04046f2577a5c76167333ca99d3903ee5331ba0", "versionType": "git"}, {"lessThan": "bb1a0f582d519c0461b0940116e2b52c5ba31459", "status": "affected", "version": "f04046f2577a5c76167333ca99d3903ee5331ba0", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/resctrl/mpam_devices.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.19"}, {"lessThan": "6.19", "status": "unaffected", "version": "0", "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\narm_mpam: Disable driver unbind to avoid UAF\n\nWhen a user unbinds an MSC and that MSC is the only MSC left for a\ncomponent then the corresponding mpam_component will be freed. If the user\nthen goes on to read the schemata file in the resctrl filesystem then the\nmpam_component will be accessed from resctrl_arch_get_config() leading to a\nuse after free.\n\nAs the MPAM driver is not a module the unbind sysfs interface is the only\nway to trigger the remove. Instead of dealing with the complexity of\nallowing some unused MSC to unbind just remove the unbind sysfs interface."}], "id": "CVE-2026-90270", "lastModified": "2026-10-19T09:19:20.603", "metrics": {}, "published": "2026-09-17T17:17:23.573", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7d199b6a0651abad3ca6d0877dbedbe8fe6ea9e2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bb1a0f582d519c0461b0940116e2b52c5ba31459"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f04046f2577a5c76167333ca99d3903ee5331ba0,7d199b6a0651abad3ca6d0877dbedbe8fe6ea9e2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f04046f2577a5c76167333ca99d3903ee5331ba0,bb1a0f582d519c0461b0940116e2b52c5ba31459)"}}], "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": "generic", "value": "6.19"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.19)"}}, {"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": "2026-09-19T05:00:08.949809+00:00", "updated": "2026-09-20T01:15:07.035097+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-416"]}