| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2024-56739: rtc: check if __rtc_read_time was successful in rtc_timer_do_work() |
| |
| Description |
| =========== |
| |
| 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. |
| |
| The Linux kernel CVE team has assigned CVE-2024-56739 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 2.6.38 with commit 6610e0893b8bc6f59b14fed7f089c5997f035f88 and fixed in 4.19.325 with commit 39ad0a1ae17b54509cd9e93dcd8cec16e7c12d3f |
| Issue introduced in 2.6.38 with commit 6610e0893b8bc6f59b14fed7f089c5997f035f88 and fixed in 5.4.287 with commit 44b3257ff705d63d5f00ef8ed314a0eeb7ec37f2 |
| Issue introduced in 2.6.38 with commit 6610e0893b8bc6f59b14fed7f089c5997f035f88 and fixed in 5.10.231 with commit 0d68e8514d9040108ff7d1b37ca71096674b6efe |
| Issue introduced in 2.6.38 with commit 6610e0893b8bc6f59b14fed7f089c5997f035f88 and fixed in 5.15.174 with commit 246f621d363988e7040f4546d20203dc713fa3e1 |
| Issue introduced in 2.6.38 with commit 6610e0893b8bc6f59b14fed7f089c5997f035f88 and fixed in 6.1.120 with commit fde56535505dde3336df438e949ef4742b6d6d6e |
| Issue introduced in 2.6.38 with commit 6610e0893b8bc6f59b14fed7f089c5997f035f88 and fixed in 6.6.64 with commit dd4b1cbcc916fad5d10c2662b62def9f05e453d4 |
| Issue introduced in 2.6.38 with commit 6610e0893b8bc6f59b14fed7f089c5997f035f88 and fixed in 6.11.11 with commit a1f0b4af90cc18b10261ecde56c6a56b22c75bd1 |
| Issue introduced in 2.6.38 with commit 6610e0893b8bc6f59b14fed7f089c5997f035f88 and fixed in 6.12.2 with commit e77bce0a8c3989b4173c36f4195122bca8f4a3e1 |
| Issue introduced in 2.6.38 with commit 6610e0893b8bc6f59b14fed7f089c5997f035f88 and fixed in 6.13 with commit e8ba8a2bc4f60a1065f23d6a0e7cbea945a0f40d |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2024-56739 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| drivers/rtc/interface.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| 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 |
