CVE-2024-27038: Linux kernel · clk: Fix clk_core_get NULL dereference
Affects Linux kernelSource GCVE Database
Not known to be exploited · CVSS 5.5 Medium · fixed in 5.4.0-1128.138~18.04.1 : update Linux kernel when convenient.
Data as of 12 Nov 2026, 18:53 UTC
- Patch
- Available – fixed in 5.4.0-1128.138~18.04.1, 5.4.0-1133.140~18.04.1, 5.4.0-1132.141~18.04.1 +65
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 1 May 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 12 Nov 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Patches and advisories
- ubuntu.com/security/notices/USN-6816-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-6817-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-6820-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-6821-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-6821-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-6817-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-6828-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-6820-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-6821-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-6817-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-6821-4 (opens in a new tab)
- ubuntu.com/security/notices/USN-6871-1 (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-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=nobleOther threats | Affected
| Fixed in
|
Ubuntu 24.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=nobleOther threats | Affected
| Fixed in
|
Ubuntu 24.04 LTSlinux-ibmpkg:deb/ubuntu/linux-ibm?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.
AI-suggested
A patch is available and should be applied. Fixed versions include 5.4.0-1128.138~18.04.1 and later. Users should update their Linux kernel to one of the fixed versions listed in the vendor advisories. No additional mitigations are required once patched.
Description
A NULL pointer dereference vulnerability exists in the Linux kernel's clk_core_get function. This occurs because clk_core_get dereferences a pointer without checking if it is NULL, leading to a potential kernel crash. The issue was introduced after a commit removed a previous NULL check. The vulnerability has been fixed by adding a check for NULL before dereferencing. Multiple Linux kernel versions prior to 5.4.0-1128.138~18.04.1 and some specific older versions are affected.
References
- ubuntu.com/security/CVE-2024-27038 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2024-27038 (opens in a new tab)
- git.kernel.org/linus/e97fe4901e0f59a0bfd524578fe3768f8ca42428 (opens in a new tab)
- git.kernel.org/stable/c/d7ae7d1265686b55832a445b1db8cdd69738ac07 (opens in a new tab)
- git.kernel.org/stable/c/239174535dba11f7b83de0eaaa27909024f8c185 (opens in a new tab)
- git.kernel.org/stable/c/0efb9ef6fb95384ba631d6819e66f10392aabfa2 (opens in a new tab)
- git.kernel.org/stable/c/a8b2b26fdd011ebe36d68a9a321ca45801685959 (opens in a new tab)
- git.kernel.org/stable/c/a5d9b1aa61b401867b9066d54086b3e4ee91f8ed (opens in a new tab)
- git.kernel.org/stable/c/c554badcae9c45b737a22d23454170c6020b90e6 (opens in a new tab)
- git.kernel.org/stable/c/6f073b24a9e2becd25ac4505a9780a87e621bb51 (opens in a new tab)
- git.kernel.org/stable/c/e97fe4901e0f59a0bfd524578fe3768f8ca42428 (opens in a new tab)
- ubuntu.com/security/notices/USN-6816-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-6817-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-6820-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-6821-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-6821-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-6817-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-6828-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-6820-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-6821-3 (opens in a new tab)