{"id":"CVE-2026-31544","state":"PUBLISHED","title":"firmware: arm_scmi: Fix NULL dereference on notify error path","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: arm_scmi: Fix NULL dereference on notify error path\n\nSince commit b5daf93b809d1 (\"firmware: arm_scmi: Avoid notifier\nregistration for unsupported events\") the call chains leading to the helper\n__scmi_event_handler_get_ops expect an ERR_PTR to be returned on failure to\nget an handler for the requested event key, while the current helper can\nstill return a NULL when no handler could be found or created.\n\nFix by forcing an ERR_PTR return value when the handler reference is NULL.","publishedAt":"2026-04-24T14:33:13.173Z","updatedAt":"2026-05-11T22:10:49.780Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b5daf93b809d13a194f8a8eeacfab1cfa241bbc3","status":"affected","lessThan":"70d9bd9a2e683afe6200b0c20af22f06f1a199a4","versionType":"git"},{"version":"b5daf93b809d13a194f8a8eeacfab1cfa241bbc3","status":"affected","lessThan":"8414d2800c34528467df23ce6192c254a73e4459","versionType":"git"},{"version":"b5daf93b809d13a194f8a8eeacfab1cfa241bbc3","status":"affected","lessThan":"555317d6100164748f7d09f80142739bd29f0cda","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/firmware/arm_scmi/notify.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.17","versionType":"semver"},{"version":"6.18.20","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.10","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/firmware/arm_scmi/notify.c"]}],"references":["https://git.kernel.org/stable/c/70d9bd9a2e683afe6200b0c20af22f06f1a199a4","https://git.kernel.org/stable/c/8414d2800c34528467df23ce6192c254a73e4459","https://git.kernel.org/stable/c/555317d6100164748f7d09f80142739bd29f0cda"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/31xxx/CVE-2026-31544.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-31544","state":"PUBLISHED","datePublished":"2026-04-24T14:33:13.173Z","dateUpdated":"2026-05-11T22:10:49.780Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-03-09T15:48:24.114Z"},"containers":{"cna":{"title":"firmware: arm_scmi: Fix NULL dereference on notify error path","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: arm_scmi: Fix NULL dereference on notify error path\n\nSince commit b5daf93b809d1 (\"firmware: arm_scmi: Avoid notifier\nregistration for unsupported events\") the call chains leading to the helper\n__scmi_event_handler_get_ops expect an ERR_PTR to be returned on failure to\nget an handler for the requested event key, while the current helper can\nstill return a NULL when no handler could be found or created.\n\nFix by forcing an ERR_PTR return value when the handler reference is NULL."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b5daf93b809d13a194f8a8eeacfab1cfa241bbc3","status":"affected","lessThan":"70d9bd9a2e683afe6200b0c20af22f06f1a199a4","versionType":"git"},{"version":"b5daf93b809d13a194f8a8eeacfab1cfa241bbc3","status":"affected","lessThan":"8414d2800c34528467df23ce6192c254a73e4459","versionType":"git"},{"version":"b5daf93b809d13a194f8a8eeacfab1cfa241bbc3","status":"affected","lessThan":"555317d6100164748f7d09f80142739bd29f0cda","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/firmware/arm_scmi/notify.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.17","versionType":"semver"},{"version":"6.18.20","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.10","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/firmware/arm_scmi/notify.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/70d9bd9a2e683afe6200b0c20af22f06f1a199a4"},{"url":"https://git.kernel.org/stable/c/8414d2800c34528467df23ce6192c254a73e4459"},{"url":"https://git.kernel.org/stable/c/555317d6100164748f7d09f80142739bd29f0cda"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T22:10:49.780Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.17","versionEndExcluding":"6.18.20"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.17","versionEndExcluding":"6.19.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.17","versionEndExcluding":"7.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}