CVE-2025-38377: Linux kernel · rose: fix dangling neighbour pointers in rose_rt_device_down()
Affects Linux kernelSource GCVE Database
Not known to be exploited · CVSS 8.8 High · fixed in 5.15.0-1092.99~20.04.1 : patch Linux kernel soon.
Data as of 26 Oct 2026, 14:05 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 20% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 5.15.0-1092.99~20.04.1, 5.15.0-1096.105~20.04.1, 5.15.0-1092.101~20.04.1 +59
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 25 Jul 2025
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-7774-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7774-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-7774-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-7775-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7776-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7775-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-7775-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-7774-4 (opens in a new tab)
- ubuntu.com/security/notices/USN-7774-5 (opens in a new tab)
- ubuntu.com/security/notices/USN-7833-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7834-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7833-2 (opens in a new tab)
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 25.10linux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=questingOther threats | 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-aws-6.14pkg:deb/ubuntu/linux-aws-6.14?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– |
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 updated Linux kernel packages. Users should apply the latest kernel updates provided by their distribution vendors, such as those listed in the Ubuntu advisories USN-7774-1 and USN-7774-2, and reboot their systems to activate the fixes. Due to ABI changes, recompilation and reinstallation of third-party kernel modules may be required. No additional mitigation steps are indicated by the vendor.
Description
A high severity use-after-free vulnerability (CVE-2025-38377) in the Linux kernel's rose network layer was identified and fixed. The flaw involves incorrect handling of neighbour pointers in the rose_rt_device_down() function, where loop index and count modifications cause some entries to be skipped, leaving dangling pointers that can be accessed later. This can lead to system compromise. The vulnerability affects many specific Linux kernel versions, primarily around 3.11.0 to 6.17.0 and various distribution-specific builds. A patch is available and included in recent Linux kernel updates. Users should update and reboot their systems to apply the fix. No known exploits in the wild have been reported.
References
- ubuntu.com/security/CVE-2025-38377 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2025-38377 (opens in a new tab)
- git.kernel.org/linus/34a500caf48c47d5171f4aa1f237da39b07c6157 (opens in a new tab)
- git.kernel.org/stable/c/2b952dbb32fef835756f07ff0cd77efbb836dfea (opens in a new tab)
- git.kernel.org/stable/c/2c6c82ee074bfcfd1bc978ec45bfea37703d840a (opens in a new tab)
- git.kernel.org/stable/c/34a500caf48c47d5171f4aa1f237da39b07c6157 (opens in a new tab)
- git.kernel.org/stable/c/446ac00b86be1670838e513b643933d78837d8db (opens in a new tab)
- git.kernel.org/stable/c/7a1841c9609377e989ec41c16551309ce79c39e4 (opens in a new tab)
- git.kernel.org/stable/c/94e0918e39039c47ddceb609500817f7266be756 (opens in a new tab)
- git.kernel.org/stable/c/b6b232e16e08c6dc120672b4753392df0d28c1b4 (opens in a new tab)
- git.kernel.org/stable/c/fe62a35fb1f77f494ed534fc69a9043dc5a30ce1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7774-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7774-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-7774-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-7775-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7776-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7775-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-7775-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-7774-4 (opens in a new tab)
- ubuntu.com/security/notices/USN-7774-5 (opens in a new tab)