Answer in brief
CVE-2026-64088 records a Unknown severity vulnerability in batman-adv: tt: fix negative tt_buff_len. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2026-64088 records a Unknown severity vulnerability in batman-adv: tt: fix negative tt_buff_len. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=a73105b8d4c765d9ebfb664d0a66802127d8e4c7 <4c4c2f340f4c27373bfcac8dc5032ce7bb474e47 || >=a73105b8d4c765d9ebfb664d0a66802127d8e4c7 <33e5ede7ce6d92e531920d4bbd6d3e18ef1c6430 || >=a73105b8d4c765d9ebfb664d0a66802127d8e4c7 <3c96dff00998314983b68a3e7caac07a66ebe496 || >=a73105b8d4c765d9ebfb664d0a66802127d8e4c7 <32edd2a28e112064020a2f319a8cb8a9e5a09767 || >=a73105b8d4c765d9ebfb664d0a66802127d8e4c7 <4dab98961426d0cf6a1599cda6950b7596ca2fcd || >=a73105b8d4c765d9ebfb664d0a66802127d8e4c7 <730de8733dd90f70d7580a9b329b971f8e1474a2 || >=a73105b8d4c765d9ebfb664d0a66802127d8e4c7 <ed28ead3420c373a7928622f114bc6168075d1e1 || >=a73105b8d4c765d9ebfb664d0a66802127d8e4c7 <b64963a2ceeb7529310b6cf253a1e540784422f4 | 4c4c2f340f4c27373bfcac8dc5032ce7bb474e47, 33e5ede7ce6d92e531920d4bbd6d3e18ef1c6430, 3c96dff00998314983b68a3e7caac07a66ebe496, 32edd2a28e112064020a2f319a8cb8a9e5a09767, 4dab98961426d0cf6a1599cda6950b7596ca2fcd, 730de8733dd90f70d7580a9b329b971f8e1474a2, ed28ead3420c373a7928622f114bc6168075d1e1, b64963a2ceeb7529310b6cf253a1e540784422f4 |
| Linux/Linuxgeneric | 3.1 | Not reported |
Published upstream
Jul 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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().
Quoted source text, attributed separately from HOL analysis.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=a73105b8d4c765d9ebfb664d0a66802127d8e4c7 <4c4c2f340f4c27373bfcac8dc5032ce7bb474e47 || >=a73105b8d4c765d9ebfb664d0a66802127d8e4c7 <33e5ede7ce6d92e531920d4bbd6d3e18ef1c6430 || >=a73105b8d4c765d9ebfb664d0a66802127d8e4c7 <3c96dff00998314983b68a3e7caac07a66ebe496 || >=a73105b8d4c765d9ebfb664d0a66802127d8e4c7 <32edd2a28e112064020a2f319a8cb8a9e5a09767 || >=a73105b8d4c765d9ebfb664d0a66802127d8e4c7 <4dab98961426d0cf6a1599cda6950b7596ca2fcd || >=a73105b8d4c765d9ebfb664d0a66802127d8e4c7 <730de8733dd90f70d7580a9b329b971f8e1474a2 || >=a73105b8d4c765d9ebfb664d0a66802127d8e4c7 <ed28ead3420c373a7928622f114bc6168075d1e1 || >=a73105b8d4c765d9ebfb664d0a66802127d8e4c7 <b64963a2ceeb7529310b6cf253a1e540784422f4 | 4c4c2f340f4c27373bfcac8dc5032ce7bb474e47, 33e5ede7ce6d92e531920d4bbd6d3e18ef1c6430, 3c96dff00998314983b68a3e7caac07a66ebe496, 32edd2a28e112064020a2f319a8cb8a9e5a09767, 4dab98961426d0cf6a1599cda6950b7596ca2fcd, 730de8733dd90f70d7580a9b329b971f8e1474a2, ed28ead3420c373a7928622f114bc6168075d1e1, b64963a2ceeb7529310b6cf253a1e540784422f4 |
| Linux/Linuxgeneric | 3.1 | Not reported |
Published upstream
Jul 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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().
Quoted source text, attributed separately from HOL analysis.