What’s Vulnerable › Vulnerabilities

CVE-2026-52922: batman-adv: dat: handle forward allocation error

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-24 · updated 2026-07-08
• Weakness: CWE-476

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.

Affected products

• Linux kernel: from 3.8 before 5.10.258; from 5.11 before 5.15.209; from 5.16 before 6.1.175; from 6.2 before 6.6.142; from 6.7 before 6.12.92; from 6.13 before 6.18.34 — fixed in 5.10.258, 5.15.209, 6.1.175, 6.12.92, 6.18.34, 6.6.142

How to fix

Upgrade to a fixed version: Linux kernel 5.10.258, 5.15.209, 6.1.175, 6.12.92. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/2d8826a2d3657cea66fb0370f9e521575a673871
• https://git.kernel.org/stable/c/2edb8aeb3cdda9d00ec4997252dc5bcd6f54d8ef
• https://git.kernel.org/stable/c/4d420d9ee70a220a2cd95aa0dd2e15acad66a505
• https://git.kernel.org/stable/c/866ac1d57040ed0b44ca732e3c66b3aa6b93011c
• https://git.kernel.org/stable/c/9bcebaedfb8479cb4affb23c7a0d000ca9a20e73
• https://git.kernel.org/stable/c/9cceea8eeba710def2a5707ee00f00c74a9a1cac
• https://git.kernel.org/stable/c/ce0c381199402a2c58f4599f4f6ed100d872d0da
• https://git.kernel.org/stable/c/cf48e75fc4fe0d5cc7721c82d454221d01367b93

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