CVE-2025-38331: Linux kernel · net: ethernet: cortina: Use TOE/TSO on all TCP
Affects Linux kernelSource GCVE Database
Not known to be exploited · CVSS 7.5 High · fixed in 6.8.0-1046.49~22.04.1 : patch Linux kernel soon.
Data as of 26 Oct 2026, 17:16 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 29% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 6.8.0-1046.49~22.04.1, 6.8.0-1051.57~22.04.1, 6.8.0-1046.53~22.04.1 +33
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 10 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.
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
An official patch is available and should be applied to affected Linux kernel versions to enable TOE and TSO features together, stabilizing the hardware. Users should update to patched kernel versions as listed in the advisory. No additional mitigation is required beyond applying the official fix.
Description
A vulnerability in the Linux kernel's cortina ethernet driver related to the use of TCP Offload Engine (TOE) and TCP Segmentation Offload (TSO) has been resolved. The issue caused hardware instability, including lockups and crashes, due to improper handling of TOE/TSO features. The fix ensures that both TOE and TSO are activated together to stabilize the hardware. This vulnerability affects specific Linux kernel versions and has a CVSS score of 7.5, indicating a medium severity impact primarily on availability.
References
- ubuntu.com/security/CVE-2025-38331 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2025-38331 (opens in a new tab)
- git.kernel.org/linus/6a07e3af4973402fa199a80036c10060b922c92c (opens in a new tab)
- git.kernel.org/stable/c/1b503b790109d19710ec83c589c3ee59e95347ec (opens in a new tab)
- git.kernel.org/stable/c/2bd434bb0eeb680c2b3dd6c68ca319b30cb8d47f (opens in a new tab)
- git.kernel.org/stable/c/6a07e3af4973402fa199a80036c10060b922c92c (opens in a new tab)
- git.kernel.org/stable/c/a37888a435b0737128d2d9c6f67b8d608f83df7a (opens in a new tab)
- git.kernel.org/stable/c/ebe12e232f1d58ebb4b53b6d9149962b707bed91 (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)
- ubuntu.com/security/notices/USN-7833-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-7833-4 (opens in a new tab)
- ubuntu.com/security/notices/USN-7856-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8028-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8028-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8031-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8028-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-8028-4 (opens in a new tab)
- ubuntu.com/security/notices/USN-8028-5 (opens in a new tab)