CVE-2024-47743: KEYS: prevent NULL pointer dereference in find_asymmetric_key()
First published: Mon Oct 21 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: KEYS: prevent NULL pointer dereference in find_asymmetric_key() In find_asymmetric_key(), if all NULLs are passed in the id_{0,1,2} arguments, the kernel will first emit WARN but then have an oops because id_2 gets dereferenced anyway. Add the missing id_2 check and move WARN_ON() to the final else branch to avoid duplicate NULL checks. Found by Linux Verification Center (linuxtesting.org) with Svace static analysis tool.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=5.17<6.1.113 | |
| Linux Kernel | >=6.2<6.6.54 | |
| Linux Kernel | >=6.7<6.10.13 | |
| Linux Kernel | >=6.11<6.11.2 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.128-1 6.12.12-1 6.12.15-1 | |
| debian/linux-6.1 | 6.1.119-1~deb11u1 |
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Reference Links
- https://git.kernel.org/stable/c/3322fa8f2aa40b0b3651034cd541647a600cc6c0
- https://git.kernel.org/stable/c/a3765b497a4f5224cb2f7a6a2d3357d3066214ee
- https://git.kernel.org/stable/c/13b5b401ead95b5d8266f64904086c55b6024900
- https://git.kernel.org/stable/c/0d3b0706ada15c333e6f9faf19590ff715e45d1e
- https://git.kernel.org/stable/c/70fd1966c93bf3bfe3fe6d753eb3d83a76597eef
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-47743
- https://nvd.nist.gov/vuln/detail/CVE-2024-47743
- https://launchpad.net/bugs/cve/CVE-2024-47743
- https://security-tracker.debian.org/tracker/CVE-2024-47743
- https://ubuntu.com/security/CVE-2024-47743
- https://git.kernel.org/linus/70fd1966c93bf3bfe3fe6d753eb3d83a76597eef
Frequently Asked Questions
What is the severity of CVE-2024-47743?
CVE-2024-47743 is classified as a high severity vulnerability due to the potential for a kernel panic caused by a NULL pointer dereference.
How do I fix CVE-2024-47743?
To mitigate CVE-2024-47743, you should update the Linux kernel to a version that has resolved this vulnerability.
Which versions of the Linux kernel are affected by CVE-2024-47743?
CVE-2024-47743 affects multiple versions of the Linux kernel between 5.17 and 6.6.54, as well as additional specific versions.
What happens if CVE-2024-47743 is exploited?
Exploitation of CVE-2024-47743 may lead to a kernel panic and potential denial of service on affected systems.
Is there a known workaround for CVE-2024-47743?
There are no known workarounds for CVE-2024-47743, and the recommended action is to apply the necessary kernel updates.
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