CVE-2026-97436: Linux kernel · dpaa2-switch: rework FDB management on the bridge leave path
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 13:47 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 24 Sep 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 26.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=resoluteOther 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 to correct the FDB management logic on the bridge leave path. Users should apply the updated Linux kernel versions containing this fix. Since this is a kernel-level vulnerability, upgrading to patched kernel versions is the recommended remediation.
Description
A vulnerability in the Linux kernel's dpaa2-switch component related to forwarding database (FDB) management on the bridge leave path has been resolved. The issue occurs when multiple bridges have ports from the same DPSW instance, causing improper FDB reuse and leading to multiple ports sharing the same FDB. This flaw was fixed by changing the FDB management logic to correctly handle the last port leaving a bridge before allocating new FDBs.
References
- ubuntu.com/security/CVE-2026-97436 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-97436 (opens in a new tab)
- git.kernel.org/stable/c/5adbc4d02d7df8bd7aa02c21874f7a582a576b55 (opens in a new tab)
- git.kernel.org/stable/c/efc1d92eacf03afa6f4d53bf7120e059b6f961f2 (opens in a new tab)
- git.kernel.org/stable/c/abea361a11e4e48695ea149652ef5d3f308b6a49 (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2026-97436 (opens in a new tab)
- git.kernel.org/stable/c/dc626f2abb3052881911b6166a9425739ce80085 (opens in a new tab)
- git.kernel.org/stable/c/e07ff2338f45adbf572850335d761c2f97545935 (opens in a new tab)
- git.kernel.org/stable/c/ec41bfd281a8bc8027a42d2674eac5b74947ff7a (opens in a new tab)