CVE-2024-38633: Linux kernel · serial: max3100: Update uart_driver_registered on driver removal
Affects Linux kernelSource GCVE Database
Not known to be exploited · CVSS 5.5 Medium · fixed in 4.4.0-1139.145 : update Linux kernel when convenient.
Data as of 28 Oct 2026, 11:12 UTC
- Patch
- Available – fixed in 4.4.0-1139.145, 4.15.0-1184.199~14.04.1, 4.4.0-262.296~14.04.1 +93
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 21 Jun 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-6951-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-6953-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-6951-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-6951-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-6951-4 (opens in a new tab)
- ubuntu.com/security/notices/USN-6979-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-6999-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7004-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7005-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7007-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7008-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7005-2 (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 included in multiple fixed Linux kernel versions such as 4.4.0-1139.145 and 4.15.0-1184.199~14.04.1. Users should update to these or later kernel versions. After updating, a system reboot is required. No additional mitigation is necessary as the issue is resolved by the official fix.
Description
A vulnerability in the Linux kernel's MAX3100 serial driver causes a kernel oops due to improper updating of a global variable during driver removal. This leads to a NULL pointer dereference after repeated module insertions and removals. The issue is fixed in several Linux kernel versions.
References
- ubuntu.com/security/CVE-2024-38633 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2024-38633 (opens in a new tab)
- git.kernel.org/linus/712a1fcb38dc7cac6da63ee79a88708fbf9c45ec (opens in a new tab)
- git.kernel.org/stable/c/21a61a7fbcfdd3493cede43ebc7c4dfae2147a8b (opens in a new tab)
- git.kernel.org/stable/c/9db4222ed8cd3e50b81c8b910ae74c26427a4003 (opens in a new tab)
- git.kernel.org/stable/c/e8e2a4339decad7e59425b594a98613402652d72 (opens in a new tab)
- git.kernel.org/stable/c/361a92c9038e8c8c3996f8eeaa14522a8ad90752 (opens in a new tab)
- git.kernel.org/stable/c/b6eb7aff23e05f362e8c9b560f6ac5e727b70e00 (opens in a new tab)
- git.kernel.org/stable/c/e8a10089eddba40d4b2080c9d3fc2d2b2488f762 (opens in a new tab)
- git.kernel.org/stable/c/fa84ca78b048dfb00df0ef446f5c35e0a98ca6a0 (opens in a new tab)
- git.kernel.org/stable/c/712a1fcb38dc7cac6da63ee79a88708fbf9c45ec (opens in a new tab)
- ubuntu.com/security/notices/USN-6951-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-6953-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-6951-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-6951-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-6951-4 (opens in a new tab)
- ubuntu.com/security/notices/USN-6979-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-6999-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7004-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7005-1 (opens in a new tab)