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Vulnerability record · CVE-2026-46238 · published 28 May 2026

CVE-2026-46238: Linux kernel vulnerability

Linux · Linux Kernel

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]

8.8 CVSS 3.1 High EPSS 0.41% · top 67.1%
8.8CVSS 3.1 base score
0.41%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

Description

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:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-46238), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.