CVE-2026-63834
CVE CVE-2026-63834EUVD EUVD-2026-45500Published 2026-07-19T12:02:26.000Z
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: batman-adv: tp_meter: restrict number of unacked list entries When the unacked_list is unbound, an attacker could send messages with small lengths and appropriated seqno + gaps to force the receiver to allocate more and more unacked_list entries. And the end either causing an out-of-memory situation or increase the management overhead for the (large) list that significant portions of CPU cycles are wasted in searching through the list. When limiting the list to a specific number, it is important to still correctly add a new entry to the list. But if the list became larger than the limit, the last entry of the list (with the highest seqno) must be dropped to still allow the earlier seqnos to finish and therefore to continue the process. Otherwise, the process might get stuck with too high seqnos which are not handled by batadv_tp_ack_unordered().
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux patch: 5.10.260; 33a3bb4a3345bb511f9c69c913da95d4693e2a4e <f8c499fd275e59203b77fca76ae6ef2d096c2133; patch: 6.12.95; 33a3bb4a3345bb511f9c69c913da95d4693e2a4e <1c616b0be4bd8399d485e25e91859373b95d6013; patch: 7.2-rc1; patch: 6.18.38; 33a3bb4a3345bb511f9c69c913da95d4693e2a4e <c6231d628d06d841bc1617b2f7034f5f39876b16; 4.8; 33a3bb4a3345bb511f9c69c913da95d4693e2a4e <31a88792bfba142be3c9521538c1db805677381f; patch: 7.1.3; 33a3bb4a3345bb511f9c69c913da95d4693e2a4e <1111a3381bca2d1f084a07686bc783af5ab23df7; patch: 6.1.177; patch: 0; 33a3bb4a3345bb511f9c69c913da95d4693e2a4e <e7c775110e1858e5a7471a23a9c9658c0af9df89; patch: 6.6.144; 33a3bb4a3345bb511f9c69c913da95d4693e2a4e <1fb8762600a393d1caccd63be5d07e1756982d68; patch: 5.15.211; 33a3bb4a3345bb511f9c69c913da95d4693e2a4e <2233787658db859f0a9b83cb397cf783bb8be865
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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