Answer in brief
CVE-2026-90093 records a High severity (CVSS 7.8) vulnerability in Bluetooth: L2CAP: access chan->conn safely in get/setsockopt. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. 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), Linux/Linux (generic), Linux/Linux (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=b66774b48dd98f07254951f74ea6f513efe7ff8b <f49321c85785178214fd67f2e9b4b73d6363783b || >=b66774b48dd98f07254951f74ea6f513efe7ff8b <ca2c4c26498643f421d35ffe258fafbd3ed461c3 || 8f90405a4a6f1f1880dc07996b47bf57c712bd8a || 32d783cafb46ff3ca58e6f9fd62c9c5f35eaf26b || 8922c7940bae9ce4b1736dddb6362370793835c2 || 91047a4396a8b1857a6f712a90cf33ec0012b189 || 0b0e2bf39cf99e458d991b9df253727e036a7d7d || d3b739db5dc6f688a60d56da872fabaf65246032 || 50c38d9f42a529691e4e67ea9cedf4f0bfc8d277 || >=5.10.265 <5.11 || >=5.15.216 <5.16 || >=6.1.183 <6.2 || >=6.6.145 <6.7 || >=6.12.97 <6.13 || >=6.18.39 <6.19 || >=7.1.4 <7.2 | f49321c85785178214fd67f2e9b4b73d6363783b, ca2c4c26498643f421d35ffe258fafbd3ed461c3, 5.11, 5.16, 6.2, 6.7, 6.13, 6.19, 7.2 |
| Linux/Linuxgeneric | 7.2 | Not reported |
| Linux/Linuxgeneric | >=d3b739db5dc6f688a60d56da872fabaf65246032 <8460dc49c9756a1e9288218060b4d41e1b704905 || >=b66774b48dd98f07254951f74ea6f513efe7ff8b <f49321c85785178214fd67f2e9b4b73d6363783b || >=b66774b48dd98f07254951f74ea6f513efe7ff8b <ca2c4c26498643f421d35ffe258fafbd3ed461c3 || 8f90405a4a6f1f1880dc07996b47bf57c712bd8a || 32d783cafb46ff3ca58e6f9fd62c9c5f35eaf26b || 8922c7940bae9ce4b1736dddb6362370793835c2 || 91047a4396a8b1857a6f712a90cf33ec0012b189 || 0b0e2bf39cf99e458d991b9df253727e036a7d7d || 50c38d9f42a529691e4e67ea9cedf4f0bfc8d277 || >=6.18.39 <6.18.57 || >=5.10.265 <5.11 || >=5.15.216 <5.16 || >=6.1.183 <6.2 || >=6.6.145 <6.7 || >=6.12.97 <6.13 || >=7.1.4 <7.2 | 8460dc49c9756a1e9288218060b4d41e1b704905, f49321c85785178214fd67f2e9b4b73d6363783b, ca2c4c26498643f421d35ffe258fafbd3ed461c3, 6.18.57, 5.11, 5.16, 6.2, 6.7, 6.13, 7.2 |
| Linux/Linuxgeneric | >=91047a4396a8b1857a6f712a90cf33ec0012b189 <19e154d794eb4d33d99ca4a087b1cea9d5e65786 || >=0b0e2bf39cf99e458d991b9df253727e036a7d7d <3af72bf8f73c519ee562e6963d5ff8e678924f93 || >=d3b739db5dc6f688a60d56da872fabaf65246032 <8460dc49c9756a1e9288218060b4d41e1b704905 || >=b66774b48dd98f07254951f74ea6f513efe7ff8b <f49321c85785178214fd67f2e9b4b73d6363783b || >=b66774b48dd98f07254951f74ea6f513efe7ff8b <ca2c4c26498643f421d35ffe258fafbd3ed461c3 || 8f90405a4a6f1f1880dc07996b47bf57c712bd8a || 32d783cafb46ff3ca58e6f9fd62c9c5f35eaf26b || 8922c7940bae9ce4b1736dddb6362370793835c2 || 50c38d9f42a529691e4e67ea9cedf4f0bfc8d277 || >=6.6.145 <6.6.160 || >=6.12.97 <6.12.114 || >=6.18.39 <6.18.57 || >=5.10.265 <5.11 || >=5.15.216 <5.16 || >=6.1.183 <6.2 || >=7.1.4 <7.2 | 19e154d794eb4d33d99ca4a087b1cea9d5e65786, 3af72bf8f73c519ee562e6963d5ff8e678924f93, 8460dc49c9756a1e9288218060b4d41e1b704905, f49321c85785178214fd67f2e9b4b73d6363783b, ca2c4c26498643f421d35ffe258fafbd3ed461c3, 6.6.160, 6.12.114, 6.18.57, 5.11, 5.16, 6.2, 7.2 |
| Linux/Linuxgeneric | >=8f90405a4a6f1f1880dc07996b47bf57c712bd8a <c66cd500ba1a58b3798c468fcc774ed2c8c2ec7d || >=32d783cafb46ff3ca58e6f9fd62c9c5f35eaf26b <737b80c97aef10404a9beed7c0ed45fcd5fc5931 || >=8922c7940bae9ce4b1736dddb6362370793835c2 <0d7b7b31ea092e17d757bd24e2e9028ba5e3a4ca || >=91047a4396a8b1857a6f712a90cf33ec0012b189 <19e154d794eb4d33d99ca4a087b1cea9d5e65786 || >=0b0e2bf39cf99e458d991b9df253727e036a7d7d <3af72bf8f73c519ee562e6963d5ff8e678924f93 || >=d3b739db5dc6f688a60d56da872fabaf65246032 <8460dc49c9756a1e9288218060b4d41e1b704905 || >=b66774b48dd98f07254951f74ea6f513efe7ff8b <f49321c85785178214fd67f2e9b4b73d6363783b || >=b66774b48dd98f07254951f74ea6f513efe7ff8b <ca2c4c26498643f421d35ffe258fafbd3ed461c3 || 50c38d9f42a529691e4e67ea9cedf4f0bfc8d277 || >=5.10.265 <5.10.273 || >=5.15.216 <5.15.224 || >=6.1.183 <6.1.191 || >=6.6.145 <6.6.160 || >=6.12.97 <6.12.114 || >=6.18.39 <6.18.57 || >=7.1.4 <7.2 | c66cd500ba1a58b3798c468fcc774ed2c8c2ec7d, 737b80c97aef10404a9beed7c0ed45fcd5fc5931, 0d7b7b31ea092e17d757bd24e2e9028ba5e3a4ca, 19e154d794eb4d33d99ca4a087b1cea9d5e65786, 3af72bf8f73c519ee562e6963d5ff8e678924f93, 8460dc49c9756a1e9288218060b4d41e1b704905, f49321c85785178214fd67f2e9b4b73d6363783b, ca2c4c26498643f421d35ffe258fafbd3ed461c3, 5.10.273, 5.15.224, 6.1.191, 6.6.160, 6.12.114, 6.18.57, 7.2 |
Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 30, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 17, 2026
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: access chan->conn safely in get/setsockopt Since commit b66774b48dd9 ("Bluetooth: L2CAP: Fix UAF in channel timeout by holding conn ref") l2cap_chan::conn has held reference and remains non-NULL also after the corresponding hci_conn is deleted. In this state accessing various fields eg. hci_conn::hdev is invalid, which leads to KASAN crash in l2cap_sock_setsockopt() access of conn->hcon->hdev. Check l2cap_chan::conn.hcon corresponds to an alive hci_conn before trying to use it in l2cap_sock.c. Hold l2cap_chan_lock() in getsockopt/setsockopt to ensure it stays alive, and to avoid data races in l2cap_chan fields.
Quoted source text, attributed separately from HOL analysis.