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TI-2026-61136 Aliases CVE-2026-90093GHSA-vcch-q6jx-pg5j

Bluetooth: L2CAP: access chan->conn safely in get/setsockopt

Priority LOW 33Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 1 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.

Summary

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.

Why it matters now

EPSS 0.00176 7th percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.10.273, 5.15.224, 6.1.191 +6Red Hat: 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux5.10.265 to before 5.10.273; 5.15.216 to before 5.15.224; 6.1.183 to before 6.1.191; 6.6.145 to before 6.6.160; 6.12.97 to before 6.12.114; 6.18.39 to before 6.18.57; 7.1.4 to before 7.25.10.273, 5.15.224, 6.1.191, 6.6.160, 6.12.114, 6.18.57, 7.2Patch availableCNA
LinuxLinux7.2 and later5.10.273, 5.15.224, 6.1.191, 6.6.160, 6.12.114, 6.18.57, 7.2.6, 7.3Patch availableCNA
  • Linux VendorLinux Affected 5.10.265 to before 5.10.273; 5.15.216 to before 5.15.224; 6.1.183 to before 6.1.191; 6.6.145 to before 6.6.160; 6.12.97 to before 6.12.114; 6.18.39 to before 6.18.57; 7.1.4 to before 7.2 Fixed in 5.10.273, 5.15.224, 6.1.191, 6.6.160, 6.12.114, 6.18.57, 7.2 Patch available CNA
  • Linux VendorLinux Affected 7.2 and later Fixed in 5.10.273, 5.15.224, 6.1.191, 6.6.160, 6.12.114, 6.18.57, 7.2.6, 7.3 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*——Linux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions — — ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 5.10.273, 5.15.224, 6.1.191, 6.6.160, 6.12.114, 6.18.57, 7.2
  • Fix · CNA Linux (Linux) Fixed in 5.10.273, 5.15.224, 6.1.191, 6.6.160, 6.12.114, 6.18.57, 7.2.6, 7.3

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet
Not affected: 6 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • Red Hat OpenShift Container Platform 4
  • Red Hat OpenShift Container Platform 5

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-90093
  2. 2026-10-03 Alias added: GHSA-vcch-q6jx-pg5j
  3. 2026-10-13 Affected versions changed · Red Hat
  4. 2026-10-13 CVSS score added · Red Hat
  5. 2026-10-16 Fix available: Linux/[email protected], Linux/Linux@8460dc49c9756a1e9288218060b4d41e1b704905 · CNA
  6. 2026-10-16 1 new reference · CNA
  7. 2026-10-19 Fix available: Linux/[email protected] · CNA
  8. 2026-10-21 Fix available: Linux/Linux@19e154d794eb4d33d99ca4a087b1cea9d5e65786, Linux/Linux@3af72bf8f73c519ee562e6963d5ff8e678924f93, Linux/[email protected] +1 · CNA
  9. 2026-10-21 2 new references · CNA
  10. 2026-10-29 CVSS score changed · Red Hat
  11. 2026-10-30 Fix available: Linux/Linux@0d7b7b31ea092e17d757bd24e2e9028ba5e3a4ca, Linux/[email protected], Linux/[email protected] +3 · CNA
  12. 2026-10-30 3 new references · CNA
  13. 2026-10-30 Affected versions changed · Red Hat

References

Other 8

  • TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
  • TI-2021-02452 Incorrect authorization in Ubuntu linux kernel KEVCVSS 3.1HIGH 8.8
  • TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
  • TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
  • TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
See all 21741 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences