5.5

CVE-2026-45834: Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_state_change_cb()

Modified
AliasesUBUNTU-CVE-2026-45834DEBIAN-CVE-2026-45834
Published 26-05-2026Last modified 15-10-2026

Vulnerability summary

CVE-2026-45834 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2.2% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.13%
0%100%
Low · -0.04 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 52 · Related 52
OPENSUSE-SU-2026:10954-1OPENSUSE-SU-2026:21555-1SUSE-SU-2026:23066-1SUSE-SU-2026:23068-1SUSE-SU-2026:23193-1SUSE-SU-2026:23194-1

Timeline

  1. 26-05-2026
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_state_change_cb() Add the same NULL guard already present in l2cap_sock_resume_cb() and l2cap_sock_ready_cb().

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.13%

Chance of exploitation in the next 30 days

Percentile

2%

Versus all other CVEs

30-day change

Decrease -0.04 pp

From 0.16% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu166 products
  • linuxAll versions (No fix recorded) | < 5.15.0-186.196 | < 6.8.0-136.136 | < 7.0.0-28.28
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1112.119 | < 6.8.0-1061.64 | < 7.0.0-1009.9
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 89bc500e41fc5b48e0573e6b0d927fc97b8951dc, < 1b1c0da227bf63479bac9982fc8d12df9aaea0fb | ≥ 89bc500e41fc5b48e0573e6b0d927fc97b8951dc, < 85426e97dc72f2088ba6d27e74cd58c3fbd43e31 | ≥ 89bc500e41fc5b48e0573e6b0d927fc97b8951dc, < 0c17c8832562b2aac288e89cefd0f46074f54bcb | ≥ 89bc500e41fc5b48e0573e6b0d927fc97b8951dc, < 5105f3e6b2df619c635b5f6a49fac131a36c7952 | ≥ 89bc500e41fc5b48e0573e6b0d927fc97b8951dc, < c88c185ae0a1067823661b220aeea613df2c127b | ≥ 89bc500e41fc5b48e0573e6b0d927fc97b8951dc, < 1810e42ff6716f320c7269d5850eca48b07b7427 | ≥ 89bc500e41fc5b48e0573e6b0d927fc97b8951dc, < a2dcf1a61d056aef15b63c6eae9441344d624389 | ≥ 89bc500e41fc5b48e0573e6b0d927fc97b8951dc, < 2ff1a41a912de8517b4482e946dd951b7d80edbf | 3.1
  • linux_kernel≥ 3.1, < 5.10.258 | ≥ 5.11, < 5.15.209 | ≥ 5.16, < 6.1.175 | ≥ 6.2, < 6.6.140 | ≥ 6.7, < 6.12.88 | ≥ 6.13, < 6.18.30 | ≥ 6.19, < 7.0.7 | 7.1:rc1 | 7.1:rc2
Debian1 product
  • linux< 6.1.176-1 | < 6.12.88-1 | < 7.0.7-1

3 vendors · 169 products

References

52 links
Show all 52 references