CVE-2026-52922 batman-adv: dat: handle forward allocation error
A missing check for allocation failure in the batman-adv module causes a NULL pointer dereference, leading to a kernel crash.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-52922?
CVE-2026-52922 is a high-severity vulnerability in Linux kernel, published on 24 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
batman-adv: dat: handle forward allocation error
batadv_dat_forward_data() calls pskb_copy_for_clone() to duplicate an skb for each DHT candidate, but does not check the return value before passing it to batadv_send_skb_prepare_unicast_4addr(). That function dereferences the skb unconditionally, so a failed allocation triggers a NULL pointer dereference.
Skip forwarding to the current DHT candidate on allocation failure.
Weakness: CWE-476
Which versions are affected by CVE-2026-52922?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-52922?
Apply the vendor's patch.
Is CVE-2026-52922 being exploited?
There is no known exploitation of CVE-2026-52922 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-90983, BELL-CVE-2026-52922, DEBIAN-CVE-2026-52922, GHSA-jv9r-93q3-fcf8, ROOT-OS-DEBIAN-11-CVE-2026-52922, ROOT-OS-DEBIAN-12-CVE-2026-52922 and 3 more.