CVE-2026-64088
CVE CVE-2026-64088EUVD EUVD-2026-45773Published 2026-07-19T15:39:58.000ZLast changed 2026-08-05T12:39:05.000ZCVSS 8.8
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: batman-adv: tt: fix negative tt_buff_len batadv_orig_node::tt_buff_len was declared as s16, but the field is never intended to hold a negative value. When a value greater than 32767 is assigned, it wraps to a negative signed integer. In batadv_send_other_tt_response(), tt_buff_len is temporarily widened to s32. The incorrectly negative s16 value propagates into the s32, causing batadv_tt_prepare_tvlv_global_data() to allocate a full sized buffer but populates only a small portion of it with the collected changeset. All remaining bits are kept uninitialized. Using an u16 avoids this type confusion and ensures that no (negative) sign extension is performed in batadv_send_other_tt_response().
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 a73105b8d4c765d9ebfb664d0a66802127d8e4c7 <4c4c2f340f4c27373bfcac8dc5032ce7bb474e47; patch: 7.0.11; a73105b8d4c765d9ebfb664d0a66802127d8e4c7 <3c96dff00998314983b68a3e7caac07a66ebe496; a73105b8d4c765d9ebfb664d0a66802127d8e4c7 <ed28ead3420c373a7928622f114bc6168075d1e1; a73105b8d4c765d9ebfb664d0a66802127d8e4c7 <33e5ede7ce6d92e531920d4bbd6d3e18ef1c6430; patch: 5.15.209; patch: 6.1.175; a73105b8d4c765d9ebfb664d0a66802127d8e4c7 <730de8733dd90f70d7580a9b329b971f8e1474a2; patch: 7.1; 3.1; patch: 5.10.258; a73105b8d4c765d9ebfb664d0a66802127d8e4c7 <b64963a2ceeb7529310b6cf253a1e540784422f4; patch: 6.6.142; patch: 0; patch: 6.12.92; a73105b8d4c765d9ebfb664d0a66802127d8e4c7 <32edd2a28e112064020a2f319a8cb8a9e5a09767; patch: 6.18.34; a73105b8d4c765d9ebfb664d0a66802127d8e4c7 <4dab98961426d0cf6a1599cda6950b7596ca2fcd
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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