CVE-2026-64089
CVE CVE-2026-64089EUVD EUVD-2026-45774Published 2026-07-19T15:39:58.000ZLast changed 2026-08-05T12:39:06.000ZCVSS 9.8
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: batman-adv: tt: fix negative last_changeset_len batadv_piv_tt::last_changeset_len 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_my_tt_response(), last_changeset_len is temporarily widened to s32. The incorrectly negative s16 value propagates into the s32, causing batadv_tt_prepare_tvlv_local_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_my_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 patch: 5.10.258; patch: 7.0.11; a73105b8d4c765d9ebfb664d0a66802127d8e4c7 <179eb62506a02d00370bd6478898cb632e10986c; patch: 5.15.209; a73105b8d4c765d9ebfb664d0a66802127d8e4c7 <22d59c72f4a47ffec121d0610f70d0d70c3c11c8; a73105b8d4c765d9ebfb664d0a66802127d8e4c7 <6314089acf0ddf64376fdc0b1420695504c73f52; patch: 6.1.175; a73105b8d4c765d9ebfb664d0a66802127d8e4c7 <c424e8519ac78eac5d9f4eecf06208a0d619ec14; a73105b8d4c765d9ebfb664d0a66802127d8e4c7 <55dc41fe8821e9a849e147255ad572bc933a9d15; patch: 6.6.142; patch: 6.18.34; 3.1; a73105b8d4c765d9ebfb664d0a66802127d8e4c7 <d29abf70c665730e249d2ec8e1402095ae26bcee; patch: 6.12.92; a73105b8d4c765d9ebfb664d0a66802127d8e4c7 <fc92cdfcb295cefa4344d71a527d61b638b7bfc4; patch: 0; patch: 7.1; a73105b8d4c765d9ebfb664d0a66802127d8e4c7 <eb235472b52ef36981c5aad330485eaf2382c53b
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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