{"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":"2026-09-17T16:08:04.648Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-09-17T16:08:04.648Z"},"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-rc1","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-rc1"}]}]}],"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"}}}}