{"id":"CVE-2024-56739","state":"PUBLISHED","title":"rtc: check if __rtc_read_time was successful in rtc_timer_do_work()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nrtc: check if __rtc_read_time was successful in rtc_timer_do_work()\n\nIf the __rtc_read_time call fails,, the struct rtc_time tm; may contain\nuninitialized data, or an illegal date/time read from the RTC hardware.\n\nWhen calling rtc_tm_to_ktime later, the result may be a very large value\n(possibly KTIME_MAX). If there are periodic timers in rtc->timerqueue,\nthey will continually expire, may causing kernel softlockup.","publishedAt":"2024-12-29T11:30:08.512Z","updatedAt":"2026-05-11T20:58:10.247Z","severity":{"score":5.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"6610e0893b8bc6f59b14fed7f089c5997f035f88","status":"affected","lessThan":"39ad0a1ae17b54509cd9e93dcd8cec16e7c12d3f","versionType":"git"},{"version":"6610e0893b8bc6f59b14fed7f089c5997f035f88","status":"affected","lessThan":"44b3257ff705d63d5f00ef8ed314a0eeb7ec37f2","versionType":"git"},{"version":"6610e0893b8bc6f59b14fed7f089c5997f035f88","status":"affected","lessThan":"0d68e8514d9040108ff7d1b37ca71096674b6efe","versionType":"git"},{"version":"6610e0893b8bc6f59b14fed7f089c5997f035f88","status":"affected","lessThan":"246f621d363988e7040f4546d20203dc713fa3e1","versionType":"git"},{"version":"6610e0893b8bc6f59b14fed7f089c5997f035f88","status":"affected","lessThan":"fde56535505dde3336df438e949ef4742b6d6d6e","versionType":"git"},{"version":"6610e0893b8bc6f59b14fed7f089c5997f035f88","status":"affected","lessThan":"dd4b1cbcc916fad5d10c2662b62def9f05e453d4","versionType":"git"},{"version":"6610e0893b8bc6f59b14fed7f089c5997f035f88","status":"affected","lessThan":"a1f0b4af90cc18b10261ecde56c6a56b22c75bd1","versionType":"git"},{"version":"6610e0893b8bc6f59b14fed7f089c5997f035f88","status":"affected","lessThan":"e77bce0a8c3989b4173c36f4195122bca8f4a3e1","versionType":"git"},{"version":"6610e0893b8bc6f59b14fed7f089c5997f035f88","status":"affected","lessThan":"e8ba8a2bc4f60a1065f23d6a0e7cbea945a0f40d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/rtc/interface.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.38","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.38","versionType":"semver"},{"version":"4.19.325","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.287","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.231","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.174","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.120","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.64","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.11.11","status":"unaffected","lessThanOrEqual":"6.11.*","versionType":"semver"},{"version":"6.12.2","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.13","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/rtc/interface.c"]}],"references":["https://git.kernel.org/stable/c/39ad0a1ae17b54509cd9e93dcd8cec16e7c12d3f","https://git.kernel.org/stable/c/44b3257ff705d63d5f00ef8ed314a0eeb7ec37f2","https://git.kernel.org/stable/c/0d68e8514d9040108ff7d1b37ca71096674b6efe","https://git.kernel.org/stable/c/246f621d363988e7040f4546d20203dc713fa3e1","https://git.kernel.org/stable/c/fde56535505dde3336df438e949ef4742b6d6d6e","https://git.kernel.org/stable/c/dd4b1cbcc916fad5d10c2662b62def9f05e453d4","https://git.kernel.org/stable/c/a1f0b4af90cc18b10261ecde56c6a56b22c75bd1","https://git.kernel.org/stable/c/e77bce0a8c3989b4173c36f4195122bca8f4a3e1","https://git.kernel.org/stable/c/e8ba8a2bc4f60a1065f23d6a0e7cbea945a0f40d","https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html","https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"],"weaknesses":["CWE-908"],"ingestedAt":"2026-10-29T20:08:12.933Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2024/56xxx/CVE-2024-56739.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-56739","state":"PUBLISHED","datePublished":"2024-12-29T11:30:08.512Z","dateUpdated":"2026-05-11T20:58:10.247Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-12-29T11:26:39.757Z"},"containers":{"cna":{"title":"rtc: check if __rtc_read_time was successful in rtc_timer_do_work()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nrtc: check if __rtc_read_time was successful in rtc_timer_do_work()\n\nIf the __rtc_read_time call fails,, the struct rtc_time tm; may contain\nuninitialized data, or an illegal date/time read from the RTC hardware.\n\nWhen calling rtc_tm_to_ktime later, the result may be a very large value\n(possibly KTIME_MAX). If there are periodic timers in rtc->timerqueue,\nthey will continually expire, may causing kernel softlockup."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"6610e0893b8bc6f59b14fed7f089c5997f035f88","status":"affected","lessThan":"39ad0a1ae17b54509cd9e93dcd8cec16e7c12d3f","versionType":"git"},{"version":"6610e0893b8bc6f59b14fed7f089c5997f035f88","status":"affected","lessThan":"44b3257ff705d63d5f00ef8ed314a0eeb7ec37f2","versionType":"git"},{"version":"6610e0893b8bc6f59b14fed7f089c5997f035f88","status":"affected","lessThan":"0d68e8514d9040108ff7d1b37ca71096674b6efe","versionType":"git"},{"version":"6610e0893b8bc6f59b14fed7f089c5997f035f88","status":"affected","lessThan":"246f621d363988e7040f4546d20203dc713fa3e1","versionType":"git"},{"version":"6610e0893b8bc6f59b14fed7f089c5997f035f88","status":"affected","lessThan":"fde56535505dde3336df438e949ef4742b6d6d6e","versionType":"git"},{"version":"6610e0893b8bc6f59b14fed7f089c5997f035f88","status":"affected","lessThan":"dd4b1cbcc916fad5d10c2662b62def9f05e453d4","versionType":"git"},{"version":"6610e0893b8bc6f59b14fed7f089c5997f035f88","status":"affected","lessThan":"a1f0b4af90cc18b10261ecde56c6a56b22c75bd1","versionType":"git"},{"version":"6610e0893b8bc6f59b14fed7f089c5997f035f88","status":"affected","lessThan":"e77bce0a8c3989b4173c36f4195122bca8f4a3e1","versionType":"git"},{"version":"6610e0893b8bc6f59b14fed7f089c5997f035f88","status":"affected","lessThan":"e8ba8a2bc4f60a1065f23d6a0e7cbea945a0f40d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/rtc/interface.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.38","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.38","versionType":"semver"},{"version":"4.19.325","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.287","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.231","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.174","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.120","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.64","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.11.11","status":"unaffected","lessThanOrEqual":"6.11.*","versionType":"semver"},{"version":"6.12.2","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.13","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/rtc/interface.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/39ad0a1ae17b54509cd9e93dcd8cec16e7c12d3f"},{"url":"https://git.kernel.org/stable/c/44b3257ff705d63d5f00ef8ed314a0eeb7ec37f2"},{"url":"https://git.kernel.org/stable/c/0d68e8514d9040108ff7d1b37ca71096674b6efe"},{"url":"https://git.kernel.org/stable/c/246f621d363988e7040f4546d20203dc713fa3e1"},{"url":"https://git.kernel.org/stable/c/fde56535505dde3336df438e949ef4742b6d6d6e"},{"url":"https://git.kernel.org/stable/c/dd4b1cbcc916fad5d10c2662b62def9f05e453d4"},{"url":"https://git.kernel.org/stable/c/a1f0b4af90cc18b10261ecde56c6a56b22c75bd1"},{"url":"https://git.kernel.org/stable/c/e77bce0a8c3989b4173c36f4195122bca8f4a3e1"},{"url":"https://git.kernel.org/stable/c/e8ba8a2bc4f60a1065f23d6a0e7cbea945a0f40d"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T20:58:10.247Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.38","versionEndExcluding":"4.19.325"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.38","versionEndExcluding":"5.4.287"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.38","versionEndExcluding":"5.10.231"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.38","versionEndExcluding":"5.15.174"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.38","versionEndExcluding":"6.1.120"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.38","versionEndExcluding":"6.6.64"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.38","versionEndExcluding":"6.11.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.38","versionEndExcluding":"6.12.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.38","versionEndExcluding":"6.13"}]}]}],"x_generato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