linux, linux-aws, linux-aws-5.4, linux-bluefield, linux-gcp, linux-gcp-5.4, linux-hwe-5.4, linux-ibm, linux-ibm-5.4
Affects Linux kernelSource GCVE Database
Not known to be exploited · fixed in 5.4.0-1151.161~18.04.1 : patch Linux kernel soon.
Data as of 31 Oct 2026, 01:29 UTC
Rated High by Threat Radar's AI analysis · No CVSS score from NVD or the CNA
- Patch
- Available – fixed in 5.4.0-1151.161~18.04.1, 5.4.0-1154.163~18.04.1, 5.4.0-222.242~18.04.1 +10
Exploitation evidence
Disclosed: evidence found.
CVE published 2 Oct 2025
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 30 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Patches and advisories
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu Pro 20.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=esm-infra/focalOther threats | Affected
| Fixed in
|
Ubuntu Pro 20.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=esm-infra/focalOther threats | Affected
| Fixed in
|
Ubuntu Pro 20.04 LTSlinux-bluefieldpkg:deb/ubuntu/linux-bluefield?arch=source&distro=esm-infra/focalOther threats | Affected
| Fixed in
|
Ubuntu Pro 20.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=esm-infra/focalOther threats | Affected
| Fixed in
|
Ubuntu Pro 20.04 LTSlinux-ibmpkg:deb/ubuntu/linux-ibm?arch=source&distro=esm-infra/focalOther threats | Affected
| Fixed in
|
Ubuntu Pro 20.04 LTSlinux-iotpkg:deb/ubuntu/linux-iot?arch=source&distro=esm-infra/focalOther 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 promptly. Ubuntu has released fixed kernel versions for all affected packages. After updating, a system reboot is required to activate the fixes. Due to an ABI change, recompilation and reinstallation of any third-party kernel modules are necessary. Users should follow the official Ubuntu security notice USN-7795-1 for detailed update instructions.
Description
Multiple security vulnerabilities were identified in the Linux kernel affecting various subsystems including Ext4 file system, NFS server daemon, packet sockets, network traffic control, and VMware vSockets driver. These flaws could potentially allow an attacker to compromise the system. Fixes have been released for affected Ubuntu kernel packages, and users are advised to update and reboot their systems. Due to ABI changes, recompilation of third-party kernel modules may be necessary after updating.
References
- ubuntu.com/security/notices/USN-7795-1 (opens in a new tab)
- ubuntu.com/security/CVE-2025-21796 (opens in a new tab)
- ubuntu.com/security/CVE-2025-37785 (opens in a new tab)
- ubuntu.com/security/CVE-2025-38477 (opens in a new tab)
- ubuntu.com/security/CVE-2025-38617 (opens in a new tab)
- ubuntu.com/security/CVE-2025-38618 (opens in a new tab)