CVE-2024-50010: exec: don't WARN for racy path_noexec check
First published: Mon Oct 21 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: exec: don't WARN for racy path_noexec check Both i_mode and noexec checks wrapped in WARN_ON stem from an artifact of the previous implementation. They used to legitimately check for the condition, but that got moved up in two commits: 633fb6ac3980 ("exec: move S_ISREG() check earlier") 0fd338b2d2cd ("exec: move path_noexec() check earlier") Instead of being removed said checks are WARN_ON'ed instead, which has some debug value. However, the spurious path_noexec check is racy, resulting in unwarranted warnings should someone race with setting the noexec flag. One can note there is more to perm-checking whether execve is allowed and none of the conditions are guaranteed to still hold after they were tested for. Additionally this does not validate whether the code path did any perm checking to begin with -- it will pass if the inode happens to be regular. Keep the redundant path_noexec() check even though it's mindless nonsense checking for guarantee that isn't given so drop the WARN. Reword the commentary and do small tidy ups while here. [brauner: keep redundant path_noexec() check]
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | <6.11.3 | |
| 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/c9b77438077d5a20c79ead95bcdaf9bd4797baaf
- https://git.kernel.org/stable/c/b723f96407a0a078cf75970e4dbf16b46d286a61
- https://git.kernel.org/stable/c/0bdf77be2330062b3a64f2bec39f62ab874a6796
- https://git.kernel.org/stable/c/0d16f53c91111cec914f0811fcc526a2ba77b20d
- https://git.kernel.org/stable/c/0d196e7589cefe207d5d41f37a0a28a1fdeeb7c6
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-50010
- https://nvd.nist.gov/vuln/detail/CVE-2024-50010
- https://launchpad.net/bugs/cve/CVE-2024-50010
- https://security-tracker.debian.org/tracker/CVE-2024-50010
- https://ubuntu.com/security/CVE-2024-50010
- https://git.kernel.org/linus/0d196e7589cefe207d5d41f37a0a28a1fdeeb7c6
Frequently Asked Questions
What is the severity of CVE-2024-50010?
CVE-2024-50010 is classified as a low severity vulnerability in the Linux kernel.
How do I fix CVE-2024-50010?
To fix CVE-2024-50010, update the Linux kernel to version 6.11.3 or later.
What systems are affected by CVE-2024-50010?
CVE-2024-50010 affects the Linux kernel versions prior to 6.11.3.
What type of vulnerability is CVE-2024-50010?
CVE-2024-50010 is a race condition vulnerability related to the exec functionality in the Linux kernel.
Is CVE-2024-50010 being actively exploited?
As of now, there are no publicly available reports of active exploitation of CVE-2024-50010.
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