Use-after-free in Linux kernel - CVE-2026-80600
Published: August 28, 2026
Vulnerability identifier: #VU146293
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80600
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to use-after-free in batman-adv distributed arp table handling in net/batman-adv/distributed-arp-table.c when processing DHCP ACK packets. A local user can trigger skb buffer reallocation and subsequent access through stale pointers to cause a denial of service.
Affected software
Linux kernel
How to mitigate CVE-2026-80600
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/01678c53a7717a748aee388b6839e7b9761d641c
- https://git.kernel.org/stable/c/059a70e1d12d6d99310e0599d37b0323557569a8
- https://git.kernel.org/stable/c/3404be97b940a9b1ae1aea5fdbc6cdbbe9cd5146
- https://git.kernel.org/stable/c/3b4c70c40f2e135a50cd38fc61c7d23a296a9981
- https://git.kernel.org/stable/c/48067b2ae4504500a7093d9e1e16b42e70330480
- https://git.kernel.org/stable/c/86aa79b43e5b561fd3648891165bd7313b541315
- https://git.kernel.org/stable/c/a82fc217cb7a447313c76ebf9f09b100771b0ddf
- https://git.kernel.org/stable/c/d755cd001fa2c248e186c1fc3df3d11d97dc843c