CVE-2026-72230: Linux kernel · batman-adv: frag: free unfragmentable packet
Affects Linux kernelSource GCVE Database
Not known to be exploited · fixed in 5.15.0-1117.124~20.04.1 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 17:16 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 12% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 5.15.0-1117.124~20.04.1, 5.15.0-1123.132~20.04.1, 5.15.0-1122.131~20.04.1 +41
Exploitation evidence
Disclosed: evidence found.
CVE published 15 Aug 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
Upgrade to a fixed release listed under Affected software.
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 patch is available and should be applied to affected Linux kernel versions. Users should update their Linux kernel to a fixed version that includes the corrected error handling in batadv_frag_send_packet(). No additional mitigation steps are indicated by the vendor advisory.
Description
A vulnerability in the Linux kernel's batman-adv subsystem was resolved, where the function batadv_frag_send_packet() improperly handled error conditions related to unfragmentable packets. Specifically, the function assumed the provided skb (socket buffer) was always consumed, but certain pre-check failures did not trigger the correct error handling, potentially leading to memory management issues.
References
- nvd.nist.gov/vuln/detail/CVE-2026-72230 (opens in a new tab)
- git.kernel.org/stable/c/04ccbed8179e7d4d0906d00939300ddc5b48ce7e (opens in a new tab)
- git.kernel.org/stable/c/08047838817561cef33ada9774a2a4663d499ecb (opens in a new tab)
- git.kernel.org/stable/c/59e1da1ab354d1f2b7bab8d44f846262f990ad9d (opens in a new tab)
- git.kernel.org/stable/c/601dff01a03ecced59938cdd69eeb2c66e4158f2 (opens in a new tab)
- git.kernel.org/stable/c/6b628425aed49a1c7a4ffc997583840fc582d32b (opens in a new tab)
- git.kernel.org/stable/c/740542f11bf8c86411c429fbd7f84fc6bee80e76 (opens in a new tab)
- git.kernel.org/stable/c/8f54162e07d3eea1e4ff21464cf2a815d79b6510 (opens in a new tab)
- git.kernel.org/stable/c/a5155aeeae8ead3c6081f7f197608033e4dcfe75 (opens in a new tab)
- ubuntu.com/security/CVE-2026-72230 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-72230 (opens in a new tab)
- git.kernel.org/linus/6b628425aed49a1c7a4ffc997583840fc582d32b (opens in a new tab)
- ubuntu.com/security/notices/USN-8876-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8878-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8879-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8877-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8875-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8888-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8889-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8887-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8888-2 (opens in a new tab)