High 8.8Published May 28, 2026

CVE-2026-46238batman-adv: stop caching unowned originator pointers in BAT IV

Updated under an hour ago (Oct 27, 2026, 10:10 PM ET)

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: batman-adv: stop caching unowned originator pointers in BAT IV BAT IV keeps the last-hop neighbor address in each neigh_node, but some paths also cache an originator pointer derived from a temporary lookup. That pointer is not owned by the neigh_node and may no longer refer to a live originator entry after purge handling runs. Stop storing the auxiliary originator pointer in the BAT IV neighbor state. When BAT IV needs the neighbor originator data, resolve it from the stored neighbor address and drop the reference again after use. [sven: avoid bonding logic for outgoing OGM]

CVSS: 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: Aug 5, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from c6c8fea29769d998d94fcec9b9f14d4b52b349d3 before 86b2b58d7c228d850c8c78e4144e6123e8ed2718; from c6c8fea29769d998d94fcec9b9f14d4b52b349d3 before 384e3050a42be9085d50507b4d5f8266a588d742; from c6c8fea29769d998d94fcec9b9f14d4b52b349d3 before 8c16c68fdbb69778f8d04f650340c3f4d1518f8e; from c6c8fea29769d998d94fcec9b9f14d4b52b349d3 before aafcbaf1159ea224528ca4075d0ba8c10ef374af; from c6c8fea29769d998d94fcec9b9f14d4b52b349d3 before 6e20700f8c524ac379ba8274ff5d453023b7c006; from c6c8fea29769d998d94fcec9b9f14d4b52b349d3 before 09dc0d1a12222ffca6481916eab3cfea477b9620; from c6c8fea29769d998d94fcec9b9f14d4b52b349d3 before 67bceeb22207f1f5a402973a3a0809e5f2698f38; from c6c8fea29769d998d94fcec9b9f14d4b52b349d3 before f03e8583532941b07761c5429de7d50766fa3110	CNA record
linux linux_kernel linux:linux_kernel	from 2.6.38 before 5.10.258; from 5.11 before 5.15.209; from 5.16 before 6.1.175; from 6.2 before 6.6.140; from 6.7 before 6.12.90; from 6.13 before 6.18.32; from 6.19 before 7.0.9; 7.1; and 2 more ranges	NVD

References

References

https://git.kernel.org/stable/c/86b2b58d7c228d850c8c78e4144e6123e8ed2718	patch
https://git.kernel.org/stable/c/384e3050a42be9085d50507b4d5f8266a588d742	patch
https://git.kernel.org/stable/c/8c16c68fdbb69778f8d04f650340c3f4d1518f8e	patch
https://git.kernel.org/stable/c/aafcbaf1159ea224528ca4075d0ba8c10ef374af	patch
https://git.kernel.org/stable/c/6e20700f8c524ac379ba8274ff5d453023b7c006	patch
https://git.kernel.org/stable/c/09dc0d1a12222ffca6481916eab3cfea477b9620	patch
https://git.kernel.org/stable/c/67bceeb22207f1f5a402973a3a0809e5f2698f38	patch
https://git.kernel.org/stable/c/f03e8583532941b07761c5429de7d50766fa3110	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.