{"id":"CVE-2026-90271","state":"PUBLISHED","title":"arm_mpam: Fix a NULL pointer dereference on unbinding after an error interrupt","description":"In the Linux kernel, the following vulnerability has been resolved:\n\narm_mpam: Fix a NULL pointer dereference on unbinding after an error interrupt\n\nIf a user unbinds an MSC after mpam_disable() has been run in response\nto an error interrupt then a dereference of a NULL pointer occurs as\nmpam_disable() sets the drvdata to NULL. Add an early return to the driver\nremove callback to avoid this.","publishedAt":"2026-09-17T16:08:05.304Z","updatedAt":"2026-10-19T09:00:48.861Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"f04046f2577a5c76167333ca99d3903ee5331ba0","status":"affected","lessThan":"a29044c9c83513c7463de2adb84c169685562ad2","versionType":"git"},{"version":"f04046f2577a5c76167333ca99d3903ee5331ba0","status":"affected","lessThan":"fc996c39689bb15aa80e5366809434f7258fb703","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/resctrl/mpam_devices.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.19","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/resctrl/mpam_devices.c"]}],"references":["https://git.kernel.org/stable/c/a29044c9c83513c7463de2adb84c169685562ad2","https://git.kernel.org/stable/c/fc996c39689bb15aa80e5366809434f7258fb703"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/90xxx/CVE-2026-90271.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-90271","state":"PUBLISHED","datePublished":"2026-09-17T16:08:05.304Z","dateUpdated":"2026-10-19T09:00:48.861Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.797Z"},"containers":{"cna":{"title":"arm_mpam: Fix a NULL pointer dereference on unbinding after an error interrupt","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\narm_mpam: Fix a NULL pointer dereference on unbinding after an error interrupt\n\nIf a user unbinds an MSC after mpam_disable() has been run in response\nto an error interrupt then a dereference of a NULL pointer occurs as\nmpam_disable() sets the drvdata to NULL. Add an early return to the driver\nremove callback to avoid this."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"f04046f2577a5c76167333ca99d3903ee5331ba0","status":"affected","lessThan":"a29044c9c83513c7463de2adb84c169685562ad2","versionType":"git"},{"version":"f04046f2577a5c76167333ca99d3903ee5331ba0","status":"affected","lessThan":"fc996c39689bb15aa80e5366809434f7258fb703","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/resctrl/mpam_devices.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.19","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/resctrl/mpam_devices.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/a29044c9c83513c7463de2adb84c169685562ad2"},{"url":"https://git.kernel.org/stable/c/fc996c39689bb15aa80e5366809434f7258fb703"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:00:48.861Z"},"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"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}