Bug 2482626 (CVE-2026-46198)

Summary: CVE-2026-46198 kernel: batman-adv: fix integer overflow on buff_pos
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
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Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel's batman-adv component. An integer overflow in the `batadv_iv_ogm_send_to_if` function, specifically with the `buff_pos` variable, can lead to an out-of-bound read. This occurs because the size check uses an `int` type while `buff_pos` uses an `s16` type, causing a mismatch that could be exploited by a local attacker.
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Description OSIDB Bzimport 2026-05-28 11:06:29 UTC 
In the Linux kernel, the following vulnerability has been resolved:

batman-adv: fix integer overflow on buff_pos

Fixing an integer overflow present in batadv_iv_ogm_send_to_if. The size
check is done using the int type in batadv_iv_ogm_aggr_packet whereas the
buff_pos variable uses the s16 type. This could lead to an out-of-bound
read.
Comment 1 Keith Grant 2026-05-28 13:46:22 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026052831-CVE-2026-46198-8c9b@gregkh/T