CVE-2025-37788: Linux kernel · cxgb4: fix memory leak in cxgb4_init_ethtool_filters() error path
Affects Linux kernelSource GCVE Database
Not known to be exploited · CVSS 5.5 Medium · fixed in 5.15.0-1088.95~20.04.1 : update Linux kernel when convenient.
Data as of 30 Oct 2026, 22:52 UTC
- Patch
- Available – fixed in 5.15.0-1088.95~20.04.1, 5.15.0-1094.103~20.04.1, 5.15.0-1087.96~20.04.2 +58
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 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
- ubuntu.com/security/notices/USN-7594-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7594-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-7594-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-7654-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7654-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-7654-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-7655-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7654-4 (opens in a new tab)
- ubuntu.com/security/notices/USN-7654-5 (opens in a new tab)
- ubuntu.com/security/notices/USN-7686-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7711-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7712-1 (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-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– |
Ubuntu 24.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?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 has been released in multiple Linux kernel versions starting from 5.15.0-1080.83~20.04.1 and later. Users should update their Linux kernel to one of the fixed versions listed in the advisory to remediate this vulnerability. No additional mitigation steps are required beyond applying the official kernel updates.
Description
A memory leak vulnerability was identified and fixed in the Linux kernel's cxgb4 driver within the cxgb4_init_ethtool_filters() function. The issue occurs when memory allocation for loc_array succeeds but allocation for bmap fails, causing incomplete cleanup and a memory leak. This flaw affects multiple Linux kernel versions prior to 5.15.0 updates. The vulnerability has been addressed in several fixed kernel releases. The CVSS score is 5.5, indicating a medium severity with impact on availability but no confidentiality or integrity loss. No known exploits are reported in the wild.
References
- ubuntu.com/security/CVE-2025-37788 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2025-37788 (opens in a new tab)
- git.kernel.org/linus/00ffb3724ce743578163f5ade2884374554ca021 (opens in a new tab)
- git.kernel.org/stable/c/00ffb3724ce743578163f5ade2884374554ca021 (opens in a new tab)
- git.kernel.org/stable/c/08aa59c0be768596467552c129e9f82166779a67 (opens in a new tab)
- git.kernel.org/stable/c/118d05b530343cd9322607b9719405ba254a4183 (opens in a new tab)
- git.kernel.org/stable/c/76deedea08899885f076aba0bb80bd1276446822 (opens in a new tab)
- git.kernel.org/stable/c/dafb6e433ab2333b67be05433dc9c6ccbc7b1284 (opens in a new tab)
- git.kernel.org/stable/c/e9de08e15aee35b96064960f95997bb6c1209c4b (opens in a new tab)
- git.kernel.org/stable/c/fa2d7708955e4f8212fd69bab1da604e60cb0b15 (opens in a new tab)
- ubuntu.com/security/notices/USN-7594-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7594-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-7594-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-7654-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7654-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-7654-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-7655-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7654-4 (opens in a new tab)
- ubuntu.com/security/notices/USN-7654-5 (opens in a new tab)
- ubuntu.com/security/notices/USN-7686-1 (opens in a new tab)