{"id":"CVE-2026-90127","state":"PUBLISHED","title":"virtio: rtc: time out alarm requests","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nvirtio: rtc: time out alarm requests\n\nRTC class operations run with rtc_device.ops_lock held. The virtio RTC\nalarm requests currently wait without a timeout for the device to return\ntheir requestq buffers.\n\nOn surprise removal, virtio-pci marks the virtqueues broken before\nunregistering the virtio device. If an alarm request is waiting when the\ndevice stops responding, viortc_remove() blocks in viortc_class_stop()\nwhile trying to acquire ops_lock. The request cannot complete and device\nremoval hangs until the waiting task is signalled.\n\nUse the same 60-second timeout as clock read requests for alarm reads,\nalarm programming, and alarm interrupt enable requests. The existing\nmessage reference counting keeps a timed-out request alive until a late\nresponse or device teardown.","publishedAt":"2026-09-17T16:06:29.219Z","updatedAt":"2026-10-19T08:58:25.555Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"9d4f22fd563e0cd02e8448e84d057e7c0132a586","status":"affected","lessThan":"28701b74c22d2a43ddf7aebb6378e60c18323865","versionType":"git"},{"version":"9d4f22fd563e0cd02e8448e84d057e7c0132a586","status":"affected","lessThan":"afbf69d1d691c06d093d7c3f17168ecb608c4977","versionType":"git"},{"version":"9d4f22fd563e0cd02e8448e84d057e7c0132a586","status":"affected","lessThan":"68e00d9212929805b40dcb9166755610f4f4acee","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/virtio/virtio_rtc_driver.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.16","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","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/virtio/virtio_rtc_driver.c"]}],"references":["https://git.kernel.org/stable/c/28701b74c22d2a43ddf7aebb6378e60c18323865","https://git.kernel.org/stable/c/afbf69d1d691c06d093d7c3f17168ecb608c4977","https://git.kernel.org/stable/c/68e00d9212929805b40dcb9166755610f4f4acee"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/90xxx/CVE-2026-90127.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-90127","state":"PUBLISHED","datePublished":"2026-09-17T16:06:29.219Z","dateUpdated":"2026-10-19T08:58:25.555Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.788Z"},"containers":{"cna":{"title":"virtio: rtc: time out alarm requests","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nvirtio: rtc: time out alarm requests\n\nRTC class operations run with rtc_device.ops_lock held. The virtio RTC\nalarm requests currently wait without a timeout for the device to return\ntheir requestq buffers.\n\nOn surprise removal, virtio-pci marks the virtqueues broken before\nunregistering the virtio device. If an alarm request is waiting when the\ndevice stops responding, viortc_remove() blocks in viortc_class_stop()\nwhile trying to acquire ops_lock. The request cannot complete and device\nremoval hangs until the waiting task is signalled.\n\nUse the same 60-second timeout as clock read requests for alarm reads,\nalarm programming, and alarm interrupt enable requests. The existing\nmessage reference counting keeps a timed-out request alive until a late\nresponse or device teardown."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"9d4f22fd563e0cd02e8448e84d057e7c0132a586","status":"affected","lessThan":"28701b74c22d2a43ddf7aebb6378e60c18323865","versionType":"git"},{"version":"9d4f22fd563e0cd02e8448e84d057e7c0132a586","status":"affected","lessThan":"afbf69d1d691c06d093d7c3f17168ecb608c4977","versionType":"git"},{"version":"9d4f22fd563e0cd02e8448e84d057e7c0132a586","status":"affected","lessThan":"68e00d9212929805b40dcb9166755610f4f4acee","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/virtio/virtio_rtc_driver.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.16","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","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/virtio/virtio_rtc_driver.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/28701b74c22d2a43ddf7aebb6378e60c18323865"},{"url":"https://git.kernel.org/stable/c/afbf69d1d691c06d093d7c3f17168ecb608c4977"},{"url":"https://git.kernel.org/stable/c/68e00d9212929805b40dcb9166755610f4f4acee"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T08:58:25.555Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.16","versionEndExcluding":"6.18.52"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.16","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.16","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}