CVE-2024-50271: Linux kernel · signal: restore the override_rlimit logic
Affects Linux kernelSource GCVE Database
Not known to be exploited · CVSS 5.5 Medium · fixed in 6.8.0-1027.29~22.04.1 : update Linux kernel when convenient.
Data as of 28 Oct 2026, 11:13 UTC
- Patch
- Available – fixed in 6.8.0-1027.29~22.04.1, 6.8.0-1027.32~22.04.1, 6.8.0-1028.30~22.04.1 +29
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 19 Nov 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Patches and advisories
- ubuntu.com/security/notices/USN-7276-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7277-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7310-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7449-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7450-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7451-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7452-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7453-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7449-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-7468-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7523-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7524-1 (opens in a new tab)
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 24.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=nobleOther threats | Affected
| Fixed in
|
Ubuntu 24.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=nobleOther threats | Affected
| Fixed in
|
Ubuntu 24.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=nobleOther threats | Affected
| Fixed in
|
Ubuntu 24.04 LTSlinux-azure-6.11pkg:deb/ubuntu/linux-azure-6.11?arch=source&distro=nobleOther threats | Affected
| Fixed in
|
Ubuntu 24.04 LTSlinux-azure-nvidiapkg:deb/ubuntu/linux-azure-nvidia?arch=source&distro=nobleOther threats | Affected
| Fixed in
|
Ubuntu 24.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=nobleOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
Description
In the Linux kernel, the following vulnerability has been resolved: signal: restore the override_rlimit logic Prior to commit d64696905554 ("Reimplement RLIMIT_SIGPENDING on top of ucounts") UCOUNT_RLIMIT_SIGPENDING rlimit was not enforced for a class of signals. However now it's enforced unconditionally, even if override_rlimit is set. This behavior change caused production issues. For example, if the limit is reached and a process receives a SIGSEGV signal, sigqueue_alloc fails to allocate the necessary resources for the signal delivery, preventing the signal from being delivered with siginfo. This prevents the process from correctly identifying the fault address and handling the error. From the user-space perspective, applications are unaware that the limit has been reached and that the siginfo is effectively 'corrupted'. This can lead to unpredictable behavior and crashes, as we observed with java applications. Fix this by passing override_rlimit into inc_rlimit_get_ucounts() and skip the comparison to max there if override_rlimit is set. This effectively restores the old behavior.
References
- ubuntu.com/security/CVE-2024-50271 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2024-50271 (opens in a new tab)
- git.kernel.org/linus/9e05e5c7ee8758141d2db7e8fea2cab34500c6ed (opens in a new tab)
- git.kernel.org/stable/c/012f4d5d25e9ef92ee129bd5aa7aa60f692681e1 (opens in a new tab)
- git.kernel.org/stable/c/4877d9b2a2ebad3ae240127aaa4cb8258b145cf7 (opens in a new tab)
- git.kernel.org/stable/c/0208ea17a1e4456fbfe555f13ae5c28f3d671e40 (opens in a new tab)
- git.kernel.org/stable/c/9e05e5c7ee8758141d2db7e8fea2cab34500c6ed (opens in a new tab)
- ubuntu.com/security/notices/USN-7276-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7277-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7310-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7449-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7450-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7451-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7452-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7453-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7449-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-7468-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7523-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7524-1 (opens in a new tab)