UBUNTU-CVE-2024-50210
In the Linux kernel, the following vulnerability has been resolved: posix-clock: posix-clock: Fix unbalanced locking in pc_clock_settime() If get_clock_desc() succeeds, it calls fget() for the clockid's fd, and get the clk->rwsem read lock, so the error path should release the lock to make the lock balance and fput the clockid's fd to make the refcount balance and release the fd related resource. However the below commit left the error path locked behind resulting in unbalanced locking. Check timespec64_valid_strict() before get_clock_desc() to fix it, because the "ts" is not changed after that. [[email protected]: fixed commit message typo]
02 / AFFECTED SOFTWARE
Affected packages
16 explicit affected versions
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37 explicit affected versions
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14 explicit affected versions
20 explicit affected versions
12 explicit affected versions
26 explicit affected versions
16 explicit affected versions
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26 explicit affected versions
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21 explicit affected versions
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4 explicit affected versions
22 explicit affected versions
16 explicit affected versions
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19 explicit affected versions
13 explicit affected versions
26 explicit affected versions
21 explicit affected versions
8 explicit affected versions
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14 explicit affected versions
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3 explicit affected versions
16 explicit affected versions
19 explicit affected versions
43 explicit affected versions
11 explicit affected versions
35 explicit affected versions
12 explicit affected versions
13 explicit affected versions
6 explicit affected versions
12 explicit affected versions
50 explicit affected versions
11 explicit affected versions
12 explicit affected versions
15 explicit affected versions
27 explicit affected versions
12 explicit affected versions
7 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
In the Linux kernel, the following vulnerability has been resolved: posix-clock: posix-clock: Fix unbalanced locking in pc_clock_settime() If get_clock_desc() succeeds, it calls fget() for the clockid's fd, and get the clk->rwsem read lock, so the error path should release the lock to make the lock balance and fput the clockid's fd to make the refcount balance and release the fd related resource. However the below commit left the error path locked behind resulting in unbalanced locking. Check timespec64_valid_strict() before get_clock_desc() to fix it, because the "ts" is not changed after that. [[email protected]: fixed commit message typo]
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/6e62807c7fbb3c758d233018caf94dfea9c65dbd
- https://git.kernel.org/stable/c/1ba33b327c3f88a7baee598979d73ab5b44d41cc
- https://git.kernel.org/stable/c/5f063bbf1ee6b01611c016b54e050a41506eb794
- https://git.kernel.org/stable/c/6e62807c7fbb3c758d233018caf94dfea9c65dbd
- https://git.kernel.org/stable/c/a8219446b95a859488feaade674d13f9efacfa32
- https://git.kernel.org/stable/c/b27330128eca25179637c1816d5a72d6cc408c66
- https://git.kernel.org/stable/c/c7fcfdba35abc9f39b83080c2bce398dad13a943
- https://git.kernel.org/stable/c/d005400262ddaf1ca1666bbcd1acf42fe81d57ce
- https://git.kernel.org/stable/c/e56e0ec1b79f5a6272c6e78b36e9d593aa0449af
- https://ubuntu.com/security/CVE-2024-50210
- https://ubuntu.com/security/notices/USN-7449-1
- https://ubuntu.com/security/notices/USN-7449-2
- https://ubuntu.com/security/notices/USN-7450-1
- https://ubuntu.com/security/notices/USN-7451-1
- https://ubuntu.com/security/notices/USN-7452-1
- https://ubuntu.com/security/notices/USN-7453-1
- https://www.cve.org/CVERecord?id=CVE-2024-50210