CVE-2024-56739: rtc: check if __rtc_read_time was successful in rtc_timer_do_work()
First published: Sun Dec 29 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: rtc: check if __rtc_read_time was successful in rtc_timer_do_work() If the __rtc_read_time call fails,, the struct rtc_time tm; may contain uninitialized data, or an illegal date/time read from the RTC hardware. When calling rtc_tm_to_ktime later, the result may be a very large value (possibly KTIME_MAX). If there are periodic timers in rtc->timerqueue, they will continually expire, may causing kernel softlockup.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | >=2.6.38<4.19.325 | |
| Linux Linux kernel | >=4.20<5.4.287 | |
| Linux Linux kernel | >=5.5<5.10.231 | |
| Linux Linux kernel | >=5.11<5.15.174 | |
| Linux Linux kernel | >=5.16<6.1.120 | |
| Linux Linux kernel | >=6.2<6.6.64 | |
| Linux Linux kernel | >=6.7<6.11.11 | |
| Linux Linux kernel | >=6.12<6.12.2 |
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Reference Links
- 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
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