NVD / CVE Program· CNA Linux

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

Noroxi assessment

Priority: Monitor (action score 22/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.12% (FIRST EPSS).
Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
Fixed version: Linux Linux 0c17c8832562b2aac288e89cefd0f46074f54bcb, 1810e42ff6716f320c7269d5850eca48b07b7427, 1b1c0da227bf63479bac9982fc8d12df9aaea0fb; azl3 kernel 6.6.139.1-1 on Azure Linux 3.0 6.6.141.1-1.

Low priority for now. Upgrade to Linux Linux 0c17c8832562b2aac288e89cefd0f46074f54bcb, 1810e42ff6716f320c7269d5850eca48b07b7427, 1b1c0da227bf63479bac9982fc8d12df9aaea0fb; azl3 kernel 6.6.139.1-1 on Azure Linux 3.0 6.6.141.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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().

MediumCVSS 5.5 · v3.1—No exploit Fix available

Published: May 26, 2026
Updated: Oct 15, 2026
EPSS: 0.1% · 2th percentile
CWE: CWE-476

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 22 / 40 · 5.5 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.1%

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Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
linux	linux kernel	cpe:2.3:o:linux:linux_kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

linux linux kernel3.1 and later · before 5.10.258
linux linux kernel5.11 and later · before 5.15.209
linux linux kernel5.16 and later · before 6.1.175
linux linux kernel6.2 and later · before 6.6.140
linux linux kernel6.7 and later · before 6.12.88
linux linux kernel6.13 and later · before 6.18.30
linux linux kernel6.19 and later · before 7.0.7
linux linux kernel7.1

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

Linux Linux
- 3.1affected
- 89bc500e41fc5b48e0573e6b0d927fc97b8951dc and later · before 1b1c0da227bf63479bac9982fc8d12df9aaea0fbaffected · git
- 89bc500e41fc5b48e0573e6b0d927fc97b8951dc and later · before 85426e97dc72f2088ba6d27e74cd58c3fbd43e31affected · git
- 89bc500e41fc5b48e0573e6b0d927fc97b8951dc and later · before 0c17c8832562b2aac288e89cefd0f46074f54bcbaffected · git
- 89bc500e41fc5b48e0573e6b0d927fc97b8951dc and later · before 5105f3e6b2df619c635b5f6a49fac131a36c7952affected · git
- 89bc500e41fc5b48e0573e6b0d927fc97b8951dc and later · before c88c185ae0a1067823661b220aeea613df2c127baffected · git
- 89bc500e41fc5b48e0573e6b0d927fc97b8951dc and later · before 1810e42ff6716f320c7269d5850eca48b07b7427affected · git
- 89bc500e41fc5b48e0573e6b0d927fc97b8951dc and later · before a2dcf1a61d056aef15b63c6eae9441344d624389affected · git
- 89bc500e41fc5b48e0573e6b0d927fc97b8951dc and later · before 2ff1a41a912de8517b4482e946dd951b7d80edbfaffected · git
- before 3.1not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Debian:12	linux	before 6.1.176-1	6.1.176-1
Debian:13	linux	before 6.12.88-1	6.12.88-1
Debian:14	linux	before 7.0.7-1	7.0.7-1
openSUSE:Tumbleweed	kernel-source	before 7.0.11-1.1	7.0.11-1.1
SUSE:Linux Enterprise Live Patching 12 SP5	kernel-default	before 4.12.14-122.333.2	4.12.14-122.333.2
SUSE:Linux Enterprise Live Patching 12 SP5	kgraft-patch-SLE12-SP5_Update_88	before 1-8.3.3	1-8.3.3
SUSE:Linux Enterprise Server 12 SP5-LTSS	kernel-source	before 4.12.14-122.333.2	4.12.14-122.333.2
SUSE:Linux Enterprise Server 12 SP5-LTSS	kernel-syms	before 4.12.14-122.333.2	4.12.14-122.333.2

Same product

linux: all records

Other highest-scoring records for the same primary product.

CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
90Now
CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
89Now
CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
85Now

Published before and after this one in the same product

← EarlierCVE-2026-43503May 23, 2026 · net: skbuff: propagate shared-frag marker through frag-transfer helpers
40Plan
← EarlierCVE-2026-46300May 23, 2026 · net: skbuff: preserve shared-frag marker during coalescing
40Plan
Later →CVE-2026-45835May 26, 2026 · Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_new_connection_cb()
22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
Linux Linux	0c17c8832562b2aac288e89cefd0f46074f54bcb	Vendor (CNA)
Linux Linux	1810e42ff6716f320c7269d5850eca48b07b7427	Vendor (CNA)
Linux Linux	1b1c0da227bf63479bac9982fc8d12df9aaea0fb	Vendor (CNA)
Linux Linux	2ff1a41a912de8517b4482e946dd951b7d80edbf	Vendor (CNA)
Linux Linux	5105f3e6b2df619c635b5f6a49fac131a36c7952	Vendor (CNA)
Linux Linux	85426e97dc72f2088ba6d27e74cd58c3fbd43e31	Vendor (CNA)
Linux Linux	a2dcf1a61d056aef15b63c6eae9441344d624389	Vendor (CNA)
Linux Linux	c88c185ae0a1067823661b220aeea613df2c127b	Vendor (CNA)
azl3 kernel 6.6.139.1-1 on Azure Linux 3.0	6.6.141.1-1 · CBL-Mariner Releases	Microsoft (MSRC)
debian:linux	6.1.176-1 · Debian:12	Package registry (OSV)
opensuse:kernel-source	7.0.11-1.1 · openSUSE:Tumbleweed	Package registry (OSV)
suse:kernel-default	4.12.14-122.333.2 · SUSE:Linux Enterprise Live Patching 12 SP5	Package registry (OSV)
suse:kernel-source	4.12.14-122.333.2 · SUSE:Linux Enterprise Server 12 SP5-LTSS	Package registry (OSV)
suse:kernel-syms	4.12.14-122.333.2 · SUSE:Linux Enterprise Server 12 SP5-LTSS	Package registry (OSV)
suse:kgraft-patch-SLE12-SP5_Update_88	1-8.3.3 · SUSE:Linux Enterprise Live Patching 12 SP5	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Someone with local access to the system can trigger it.
A low-privileged account is enough.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: none
Integrity: none
Availability: high · the service can be disrupted

Attack vector: Local
Attack complexity: Low
Privileges required: Low
User interaction: None
Scope: Unchanged
Confidentiality impact: None
Integrity impact: None
Availability impact: High

Weakness class (CWE)

CWE-476 · NULL Pointer Dereference

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

Fix✗ → ✓Sep 28, 2026, 10:11 PM UTC

For records you follow, these changes also arrive as notifications. →

References

git.kernel.org/stable/c/0c17c8832562b2aac288e89cefd0f46074f54bcb

Show all references (8 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records