CVE-2026-52922

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.

CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS — Exploit Prediction

0.0039

Probability of exploitation

0.31%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other 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

Frequently Asked Questions

What is CVE-2026-52922? +

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. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-52922? +

CVE-2026-52922 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0039, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-52922? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.