Advisory [CVE-2026-52922] handle forward allocation error
This security Red Hat Linux advisory covers CVE-2026-52922.
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Summary
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.
A flaw was found in the Linux kernel's batman-adv (Better Approach To Mobile Ad-hoc Networking) module. This vulnerability occurs because the `batadv_dat_forward_data()` function fails to validate the success of a memory allocation operation.
An attacker could exploit this by triggering a scenario where the memory allocation fails, leading to a NULL pointer dereference and causing the system to crash. This results in a Denial of Service (DoS).
Red Hat severity: not rated. Weakness: CWE-252.
Red Hat lists Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9 as not affected.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · medium-confidence parse· fetched 9 days ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · medium-confidence parse· fetched 9 days ago·verify at source
Mitigation
The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.
Official advisory · medium-confidence parse· fetched 9 days ago·verify at source
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