CVE-2026-64089

A flaw was found in the Linux kernel's batman-adv module. An integer overflow vulnerability in the lastchangesetlen field can cause it to become a negative value. This leads to a buffer being improperly initialized, potentially exposing sensitive information. A local attacker could exploit this t...

Linux Distros Unpatched Vulnerability : CVE-2026-64089

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - batman-adv: tt: fix negative lastchangesetlen batadvpivtt::lastchangesetlen len was declared as s16, but the field is never intended to hold a negative value...

CVE-2026-64089 batman-adv: tt: fix negative last_changeset_len

In the Linux kernel, the following vulnerability has been resolved: batman-adv: tt: fix negative lastchangesetlen batadvpivtt::lastchangesetlen len was declared as s16, but the field is never intended to hold a negative value. When a value greater than 32767 is assigned, it wraps to a negative...

CVE-2026-64089

CVE-2026-64089 affects the Linux kernel Batman-Adv (batman-adv) TT code. The root cause is that last_changeset_len was declared as s16, which can wrap when values exceed 32767, producing a negative value that then propagates into a widened s32. This leads batadv_tt_prepare_tvlv_local_data() to al...