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TI-2023-30490 Aliases CVE-2023-54214GHSA-c5c6-fj3h-jwh2

Bluetooth: L2CAP: Fix potential user-after-free

Priority MEDIUM 40Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 9 fixed, 2 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: Fix potential user-after-free This fixes all instances of which requires to allocate a buffer calling alloc_skb which may release the chan lock and reacquire later which makes it possible that the chan is disconnected in the meantime.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.003 22nd percentileScored 2026-11-07
Fix Partial Linux (Linux): 4.14.308, 4.19.276, 5.4.235 +5Red Hat: 3 advisoriesRed Hat: 9 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux3.5 and later4.14.308, 4.19.276, 5.4.235, 5.10.173, 5.15.99, 6.1.16, 6.2.3, 6.3Patch availableCNA
  • Linux VendorLinux Affected 3.5 and later Fixed in 4.14.308, 4.19.276, 5.4.235, 5.10.173, 5.15.99, 6.1.16, 6.2.3, 6.3 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 4.14.308, 4.19.276, 5.4.235, 5.10.173, 5.15.99, 6.1.16, 6.2.3, 6.3

Red Hat 3 advisories

  • RHSA-2026:70402 Released 2026-09-22 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.166.1.el8_10, kernel-4.18.0-553.166.1.el8_10, kernel-abi-stablelists-4.18.0-553.166.1.el8_10 +19
    • Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.166.1.el8_10
  • RHSA-2026:70403 Released 2026-09-22 · Red Hat rating Important
    kernel-rt security, bug fix, and enhancement update
    • Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-553.166.1.rt7.507.el8_10, kernel-rt-core-4.18.0-553.166.1.rt7.507.el8_10, kernel-rt-debug-4.18.0-553.166.1.rt7.507.el8_10 +9
    • Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-553.166.1.rt7.507.el8_10, kernel-rt-core-4.18.0-553.166.1.rt7.507.el8_10, kernel-rt-debug-4.18.0-553.166.1.rt7.507.el8_10 +7
  • RHSA-2024:2394 Released 2024-04-30 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-427.13.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.13.1.el9_4, kernel-64k-devel-5.14.0-427.13.1.el9_4 +11
    • Red Hat Enterprise Linux BaseOS (v. 9) bpftool-7.3.0-427.13.1.el9_4, kernel-5.14.0-427.13.1.el9_4, kernel-64k-5.14.0-427.13.1.el9_4 +29
    • Red Hat Enterprise Linux CRB (v. 9) kernel-tools-libs-devel-5.14.0-427.13.1.el9_4, libperf-5.14.0-427.13.1.el9_4
    • Red Hat Enterprise Linux NFV (v. 9) kernel-rt-5.14.0-427.13.1.el9_4, kernel-rt-core-5.14.0-427.13.1.el9_4, kernel-rt-debug-5.14.0-427.13.1.el9_4 +11
    • Red Hat Enterprise Linux RT (v. 9) kernel-rt-5.14.0-427.13.1.el9_4, kernel-rt-core-5.14.0-427.13.1.el9_4, kernel-rt-debug-5.14.0-427.13.1.el9_4 +9

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 7AffectedNo fix yet
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2024:2394
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2026:70402
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2024:2394
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2026:70402
Red Hat Enterprise Linux CRB (v. 9)Fixed RHSA-2024:2394
Red Hat Enterprise Linux NFV (v. 8)Fixed RHSA-2026:70403
Red Hat Enterprise Linux NFV (v. 9)Fixed RHSA-2024:2394
Red Hat Enterprise Linux RT (v. 8)Fixed RHSA-2026:70403
Red Hat Enterprise Linux RT (v. 9)Fixed RHSA-2024:2394
Not affected: 2 products
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 6

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-54214
  2. 2026-10-03 Alias added: GHSA-c5c6-fj3h-jwh2
  3. 2026-10-16 CISA SSVC decision points changed
  4. 2026-10-16 Priority changed: LOW → MEDIUM

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