CVE-2026-99029: Linux kernel · net: sparx5: free the matchall entry on destroy
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 28 Oct 2026, 01:45 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
Exploitation evidence
Disclosed: evidence found.
CVE published 23 Oct 2026
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
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.10linuxpkg:deb/ubuntu/linux?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-oraclepkg:deb/ubuntu/linux-oracle?arch=source&distro=stonkingOther 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 fix has been implemented that frees the leaked memory after unlinking the matchall entries. Users should update to patched kernel versions that include this fix. Since this is a kernel memory leak, applying the official kernel updates for the affected versions will remediate the issue.
Description
A memory leak vulnerability was identified and fixed in the Linux kernel's sparx5 network driver. The issue involved the sparx5_tc_matchall_destroy() function failing to free allocated memory for matchall filter entries, causing a leak when deleting mirror and goto matchall filters. The leak was confirmed using kmemleak on specific hardware and resolved by freeing the entries after unlinking them.
References
- ubuntu.com/security/CVE-2026-99029 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-99029 (opens in a new tab)
- git.kernel.org/stable/c/2b82e16d6084cbc651e3c902198f1945408ee1a5 (opens in a new tab)
- git.kernel.org/stable/c/44efb6d92dd5a2b1dd9553d92ef0eebde135fc6e (opens in a new tab)
- git.kernel.org/stable/c/cc7cc5955d22ea90555f09a680d4bf56d4a0c24a (opens in a new tab)
- git.kernel.org/stable/c/fa0c27d9e17ee2e46d4b8274a6fde706f0d6725e (opens in a new tab)