CVE-2024-46829: rtmutex: Drop rt_mutex::wait_lock before scheduling
First published: Fri Sep 27 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: rtmutex: Drop rt_mutex::wait_lock before scheduling rt_mutex_handle_deadlock() is called with rt_mutex::wait_lock held. In the good case it returns with the lock held and in the deadlock case it emits a warning and goes into an endless scheduling loop with the lock held, which triggers the 'scheduling in atomic' warning. Unlock rt_mutex::wait_lock in the dead lock case before issuing the warning and dropping into the schedule for ever loop. [ tglx: Moved unlock before the WARN(), removed the pointless comment, massaged changelog, added Fixes tag ]
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=3.2.61<3.3 | |
| Linux Kernel | >=3.4.99<3.5 | |
| Linux Kernel | >=3.10.49<3.11 | |
| Linux Kernel | >=3.12.25<3.13 | |
| Linux Kernel | >=3.14.10<3.15 | |
| Linux Kernel | >=3.15.3<3.16 | |
| Linux Kernel | >=3.16<4.19.322 | |
| Linux Kernel | >=4.20<5.4.284 | |
| Linux Kernel | >=5.5<5.10.226 | |
| Linux Kernel | >=5.11<5.15.167 | |
| Linux Kernel | >=5.16<6.1.110 | |
| Linux Kernel | >=6.2<6.6.51 | |
| Linux Kernel | >=6.7<6.10.10 | |
| Linux Kernel | =6.11-rc1 | |
| Linux Kernel | =6.11-rc2 | |
| Linux Kernel | =6.11-rc3 | |
| Linux Kernel | =6.11-rc4 | |
| Linux Kernel | =6.11-rc5 | |
| Linux Kernel | =6.11-rc6 | |
| debian/linux | <=5.10.223-1 | 5.10.234-1 6.1.129-1 6.1.135-1 6.12.22-1 6.12.25-1 |
| debian/linux-6.1 | 6.1.129-1~deb11u1 |
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Reference Links
- https://git.kernel.org/stable/c/432efdbe7da5ecfcbc0c2180cfdbab1441752a38
- https://git.kernel.org/stable/c/6a976e9a47e8e5b326de671811561cab12e6fb1f
- https://git.kernel.org/stable/c/1401da1486dc1cdbef6025fd74a3977df3a3e5d0
- https://git.kernel.org/stable/c/93f44655472d9cd418293d328f9d141ca234ad83
- https://git.kernel.org/stable/c/a92d81c9efec9280681c27a2c0a963fd0f1338e0
- https://git.kernel.org/stable/c/85f03ca98e07cd0786738b56ae73740bce0ac27f
- https://git.kernel.org/stable/c/f13b5afc5c4889569d84c3011ce449f61fccfb28
- https://git.kernel.org/stable/c/d33d26036a0274b472299d7dcdaa5fb34329f91b
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-46829
- https://nvd.nist.gov/vuln/detail/CVE-2024-46829
- https://launchpad.net/bugs/cve/CVE-2024-46829
- https://security-tracker.debian.org/tracker/CVE-2024-46829
- https://ubuntu.com/security/CVE-2024-46829
- https://git.kernel.org/linus/d33d26036a0274b472299d7dcdaa5fb34329f91b
Frequently Asked Questions
What is the severity of CVE-2024-46829?
CVE-2024-46829 has a moderate severity rating due to potential deadlock situations in the Linux kernel's rtmutex implementation.
How do I fix CVE-2024-46829?
To fix CVE-2024-46829, update the Linux kernel to a version that includes the patch for this vulnerability.
Which versions of the Linux kernel are affected by CVE-2024-46829?
CVE-2024-46829 affects Linux kernel versions from 3.2.61 to 6.11-rc6.
Is CVE-2024-46829 exploitable remotely?
CVE-2024-46829 is not classified as remotely exploitable as it primarily impacts local thread scheduling.
What systems should I prioritize for patching against CVE-2024-46829?
Focus on systems running affected Linux kernel versions, particularly those used in critical applications or services.
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