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Vulnerability record · CVE-2026-52922 · published 24 June 2026

CVE-2026-52922: Linux kernel null pointer dereference vulnerability

Linux · Linux Kernel

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.

7.5 CVSS 3.1 High EPSS 0.72% · top 48.1% CWE-476 · NULL pointer dereference
7.5CVSS 3.1 base score
0.72%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
8 Jul 2026Last modified by NVD

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-52922), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.