Answer in brief
CVE-2026-63869 records a Unknown severity vulnerability in wifi: mac80211: limit injected antenna index in ieee80211_parse_tx_radiotap. 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 | >=ef246a1480cc484cd2aeda75737cb0848616ddf3 <f6d3dc8e8492bf8435e0b23c99472af7bafd6b44 || >=ef246a1480cc484cd2aeda75737cb0848616ddf3 <9b40c59bab08f2a99abf969cc0bb92fa49de004b || >=ef246a1480cc484cd2aeda75737cb0848616ddf3 <033ce021a220913ac02416fcb5ac883a9ff8b6c7 || >=ef246a1480cc484cd2aeda75737cb0848616ddf3 <6c0cf89f36ac0c0fd8687a4ccdce2efb23a9c663 | f6d3dc8e8492bf8435e0b23c99472af7bafd6b44, 9b40c59bab08f2a99abf969cc0bb92fa49de004b, 033ce021a220913ac02416fcb5ac883a9ff8b6c7, 6c0cf89f36ac0c0fd8687a4ccdce2efb23a9c663 |
| Linux/Linuxgeneric | 6.7 | 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: wifi: mac80211: limit injected antenna index in ieee80211_parse_tx_radiotap When parsing the radiotap header of an injected frame, ieee80211_parse_tx_radiotap() uses the IEEE80211_RADIOTAP_ANTENNA value directly as a shift count: info->control.antennas |= BIT(*iterator.this_arg); *iterator.this_arg is an 8-bit value taken straight from the frame supplied by userspace, so BIT() can be asked to shift by up to 255. That is undefined behaviour on the unsigned long and is reported by UBSAN: UBSAN: shift-out-of-bounds in net/mac80211/tx.c:2174:30 shift exponent 235 is too large for 64-bit type 'unsigned long' Call Trace: ieee80211_parse_tx_radiotap+0xadb/0x1950 net/mac80211/tx.c:2174 ieee80211_monitor_start_xmit+0xb1f/0x1250 net/mac80211/tx.c:2451 ... packet_sendmsg+0x3eb6/0x50f0 net/packet/af_packet.c:3109 info->control.antennas is a 2-bit bitmap (u8 antennas:2), so only antenna indices 0 and 1 can ever be represented. Ignore any larger value instead of shifting out of bounds.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-63869 records a Unknown severity vulnerability in wifi: mac80211: limit injected antenna index in ieee80211_parse_tx_radiotap. 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 | >=ef246a1480cc484cd2aeda75737cb0848616ddf3 <f6d3dc8e8492bf8435e0b23c99472af7bafd6b44 || >=ef246a1480cc484cd2aeda75737cb0848616ddf3 <9b40c59bab08f2a99abf969cc0bb92fa49de004b || >=ef246a1480cc484cd2aeda75737cb0848616ddf3 <033ce021a220913ac02416fcb5ac883a9ff8b6c7 || >=ef246a1480cc484cd2aeda75737cb0848616ddf3 <6c0cf89f36ac0c0fd8687a4ccdce2efb23a9c663 | f6d3dc8e8492bf8435e0b23c99472af7bafd6b44, 9b40c59bab08f2a99abf969cc0bb92fa49de004b, 033ce021a220913ac02416fcb5ac883a9ff8b6c7, 6c0cf89f36ac0c0fd8687a4ccdce2efb23a9c663 |
| Linux/Linuxgeneric | 6.7 | 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: wifi: mac80211: limit injected antenna index in ieee80211_parse_tx_radiotap When parsing the radiotap header of an injected frame, ieee80211_parse_tx_radiotap() uses the IEEE80211_RADIOTAP_ANTENNA value directly as a shift count: info->control.antennas |= BIT(*iterator.this_arg); *iterator.this_arg is an 8-bit value taken straight from the frame supplied by userspace, so BIT() can be asked to shift by up to 255. That is undefined behaviour on the unsigned long and is reported by UBSAN: UBSAN: shift-out-of-bounds in net/mac80211/tx.c:2174:30 shift exponent 235 is too large for 64-bit type 'unsigned long' Call Trace: ieee80211_parse_tx_radiotap+0xadb/0x1950 net/mac80211/tx.c:2174 ieee80211_monitor_start_xmit+0xb1f/0x1250 net/mac80211/tx.c:2451 ... packet_sendmsg+0x3eb6/0x50f0 net/packet/af_packet.c:3109 info->control.antennas is a 2-bit bitmap (u8 antennas:2), so only antenna indices 0 and 1 can ever be represented. Ignore any larger value instead of shifting out of bounds.
Quoted source text, attributed separately from HOL analysis.