CVE-2026-46238
published 2026-05-28CVE-2026-46238: 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…
PriorityP344high8.8CVSS 3.1
AVAACLPRNUINSUCHIHAH
EPSS
0.26%
17.8th percentile
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]
Affected
19 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| linux | linux | — | — |
| linux | linux | >= c6c8fea29769d998d94fcec9b9f14d4b52b349d3 < 86b2b58d7c228d850c8c78e4144e6123e8ed2718 | 86b2b58d7c228d850c8c78e4144e6123e8ed2718 |
| linux | linux | >= c6c8fea29769d998d94fcec9b9f14d4b52b349d3 < 384e3050a42be9085d50507b4d5f8266a588d742 | 384e3050a42be9085d50507b4d5f8266a588d742 |
| linux | linux | >= c6c8fea29769d998d94fcec9b9f14d4b52b349d3 < 8c16c68fdbb69778f8d04f650340c3f4d1518f8e | 8c16c68fdbb69778f8d04f650340c3f4d1518f8e |
| linux | linux | >= c6c8fea29769d998d94fcec9b9f14d4b52b349d3 < aafcbaf1159ea224528ca4075d0ba8c10ef374af | aafcbaf1159ea224528ca4075d0ba8c10ef374af |
| linux | linux | >= c6c8fea29769d998d94fcec9b9f14d4b52b349d3 < 6e20700f8c524ac379ba8274ff5d453023b7c006 | 6e20700f8c524ac379ba8274ff5d453023b7c006 |
| linux | linux | >= c6c8fea29769d998d94fcec9b9f14d4b52b349d3 < 09dc0d1a12222ffca6481916eab3cfea477b9620 | 09dc0d1a12222ffca6481916eab3cfea477b9620 |
| linux | linux | >= c6c8fea29769d998d94fcec9b9f14d4b52b349d3 < 67bceeb22207f1f5a402973a3a0809e5f2698f38 | 67bceeb22207f1f5a402973a3a0809e5f2698f38 |
| linux | linux | >= c6c8fea29769d998d94fcec9b9f14d4b52b349d3 < f03e8583532941b07761c5429de7d50766fa3110 | f03e8583532941b07761c5429de7d50766fa3110 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 2.6.38 < 5.10.258 | 5.10.258 |
| linux | linux_kernel | >= 5.11 < 5.15.209 | 5.15.209 |
| linux | linux_kernel | >= 5.16 < 6.1.175 | 6.1.175 |
| linux | linux_kernel | >= 6.13 < 6.18.32 | 6.18.32 |
| linux | linux_kernel | >= 6.19 < 7.0.9 | 7.0.9 |
| linux | linux_kernel | >= 6.2 < 6.6.140 | 6.6.140 |
| linux | linux_kernel | >= 6.7 < 6.12.90 | 6.12.90 |
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
GHSA
GHSA-vhmf-xjjg-5pxr: In the Linux kernel, the following vulnerability has been resolved:
batman-adv: stop caching unowned originator pointers in BAT IV
BAT IV keeps the
ghsa_unreviewed·2026-05-28
CVE-2026-46238 GHSA-vhmf-xjjg-5pxr: In the Linux kernel, the following vulnerability has been resolved:
batman-adv: stop caching unowned originator pointers in BAT IV
BAT IV keeps the
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]
Red Hat
kernel: batman-adv: stop caching unowned originator pointers in BAT IV
vendor_redhat·2026-05-28
CVE-2026-46238 CWE-825 kernel: batman-adv: stop caching unowned originator pointers in BAT IV
kernel: batman-adv: stop caching unowned originator pointers in BAT IV
A flaw was found in the `batman-adv` module of the Linux kernel. The BAT IV protocol was caching unowned originator pointers, which could become invalid after purge handling. This could lead to the use of stale data, potentially causing unexpected system behavior or information corruption within the kernel.
Package: kernel (Red Hat Enterprise Linux 10) - Not affected
Package: kernel (Red Hat Enterprise Linux 6) - Not affected
Package: kernel (Red Hat Enterprise Linux 7) - Not affected
Package: kernel-rt (Red Hat Enterprise Linux 7) - Not affected
Package: kernel (Red Hat Enterprise Linux 8) - Not affected
Package: kernel-rt (Red Hat Enterprise Linux 8) - Not affected
Package: kernel (Red Hat Enterprise Linux 9)
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/09dc0d1a12222ffca6481916eab3cfea477b9620https://git.kernel.org/stable/c/384e3050a42be9085d50507b4d5f8266a588d742https://git.kernel.org/stable/c/67bceeb22207f1f5a402973a3a0809e5f2698f38https://git.kernel.org/stable/c/6e20700f8c524ac379ba8274ff5d453023b7c006https://git.kernel.org/stable/c/86b2b58d7c228d850c8c78e4144e6123e8ed2718https://git.kernel.org/stable/c/8c16c68fdbb69778f8d04f650340c3f4d1518f8ehttps://git.kernel.org/stable/c/aafcbaf1159ea224528ca4075d0ba8c10ef374afhttps://git.kernel.org/stable/c/f03e8583532941b07761c5429de7d50766fa3110
2026-05-28
Published