Medium [CVE-2026-72231] avoid request storms during pending request
This medium-severity Red Hat Linux advisory covers CVE-2026-72231.
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Summary
In the Linux kernel, the following vulnerability has been resolved: batman-adv: tt: avoid request storms during pending request batadv_send_tt_request() allocates a tt_req_node when none exists for the destination originator node. This should prevent that a multiple TT requests are send at the same time to an originator.
But if allocation of the send buffer failed, this request must be cleaned up again. But indicator for such a failure is "ret == false".
But the actual implementation is checking for "ret == true". The check must be inverted to not loose the information about the TT request directly after it was attempted to be sent out.
A flaw was found in the batman-adv (Better Approach To Mobile Ad-hoc Networking) module of the Linux kernel. An incorrect check during the handling of TT (Topology Table) requests can prevent the proper cleanup of request nodes when send buffer allocation fails.
This can lead to a remote attacker causing request storms, potentially resulting in a Denial of Service (DoS) condition. Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).
Weakness: CWE-772. 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 24 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 24 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 24 days ago·verify at source
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