CVE-2026-45836: Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_get_sndtimeo_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 32bd343803d4ba47cc516f9d5f037f01b855d767, 58dc5e3d8768e121907608e6e196a908512fb083, 6e8d1a2a677a81caa60cf0aabd4217bd585fbba1; 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 32bd343803d4ba47cc516f9d5f037f01b855d767, 58dc5e3d8768e121907608e6e196a908512fb083, 6e8d1a2a677a81caa60cf0aabd4217bd585fbba1; 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_get_sndtimeo_cb() Add the same NULL guard already present in l2cap_sock_resume_cb() and l2cap_sock_ready_cb().
- Published
- May 26, 2026
- Updated
- Oct 15, 2026
- EPSS
- 0.1% · 2th percentile
- CWE
- CWE-476
Report tools
Action score
22
Monitor
Low priority for now.
- CVSS
- 22 / 40 · 5.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.1%
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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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.
We use this product, ask for helpAffected 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 kernel3.13 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 6.12.90
- 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
- 3.13affected
- 8d836d71e2223b8961b21112bb4ce89ef8231682 and later · before fd072f833147b0bc10c43a454624cb99d02f3fc7affected · git
- 8d836d71e2223b8961b21112bb4ce89ef8231682 and later · before 6e8d1a2a677a81caa60cf0aabd4217bd585fbba1affected · git
- 8d836d71e2223b8961b21112bb4ce89ef8231682 and later · before e1863e7480feddb90125d0dd5a1b572972d75908affected · git
- 8d836d71e2223b8961b21112bb4ce89ef8231682 and later · before cf1fd517f892ded88168df878f834b625133f86daffected · git
- 8d836d71e2223b8961b21112bb4ce89ef8231682 and later · before 58dc5e3d8768e121907608e6e196a908512fb083affected · git
- 8d836d71e2223b8961b21112bb4ce89ef8231682 and later · before 32bd343803d4ba47cc516f9d5f037f01b855d767affected · git
- 8d836d71e2223b8961b21112bb4ce89ef8231682 and later · before a93d66907dd4d29b65c9797a93784bf61906d6d6affected · git
- 8d836d71e2223b8961b21112bb4ce89ef8231682 and later · before 78a88d43dab8d23aeef934ed8ce34d40e6b3d613affected · git
- before 3.13not 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 6.12.90-1 | 6.12.90-1 |
| Debian:14 | linux | before 7.0.7-1 | 7.0.7-1 |
| openSUSE:Leap 16.0 | dtb-aarch64 | before 6.12.0-160000.39.1 | 6.12.0-160000.39.1 |
| openSUSE:Leap 16.0 | kernel-64kb | before 6.12.0-160000.39.1 | 6.12.0-160000.39.1 |
| openSUSE:Leap 16.0 | kernel-azure | before 6.12.0-160000.39.1 | 6.12.0-160000.39.1 |
| openSUSE:Leap 16.0 | kernel-default | before 6.12.0-160000.39.1 | 6.12.0-160000.39.1 |
| openSUSE:Leap 16.0 | kernel-default-base | before 6.12.0-160000.39.1.160000.2.25 | 6.12.0-160000.39.1.160000.2.25 |
| openSUSE:Leap 16.0 | kernel-docs | before 6.12.0-160000.39.1 | 6.12.0-160000.39.1 |
| openSUSE:Leap 16.0 | kernel-kvmsmall | before 6.12.0-160000.39.1 | 6.12.0-160000.39.1 |
| openSUSE:Leap 16.0 | kernel-obs-build | before 6.12.0-160000.39.1 | 6.12.0-160000.39.1 |
| openSUSE:Leap 16.0 | kernel-obs-qa | before 6.12.0-160000.39.1 | 6.12.0-160000.39.1 |
| openSUSE:Leap 16.0 | kernel-rt | before 6.12.0-160000.39.1 | 6.12.0-160000.39.1 |
| openSUSE:Leap 16.0 | kernel-source | before 6.12.0-160000.39.1 | 6.12.0-160000.39.1 |
| openSUSE:Leap 16.0 | kernel-syms | before 6.12.0-160000.39.1 | 6.12.0-160000.39.1 |
| openSUSE:Leap 16.0 | kernel-zfcpdump | before 6.12.0-160000.39.1 | 6.12.0-160000.39.1 |
| 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 Live Patching 15 SP7 | kernel-livepatch-SLE15-SP7_Update_22 | before 1-150700.15.3.1 | 1-150700.15.3.1 |
| SUSE:Linux Enterprise Live Patching 15 SP7 | kernel-livepatch-SLE15-SP7-RT_Update_21 | before 1-150700.1.3.1 | 1-150700.1.3.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP7 | kernel-64kb | before 6.4.0-150700.53.84.1 | 6.4.0-150700.53.84.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP7 | kernel-default | before 6.4.0-150700.53.84.1 | 6.4.0-150700.53.84.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP7 | kernel-default-base | before 6.4.0-150700.53.84.1.150700.17.47.1 | 6.4.0-150700.53.84.1.150700.17.47.1 |
+30
Same product
linux: all recordsOther highest-scoring records for the same primary product.
- CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV90Now
- 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 KEV89Now
- CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV85Now
Published before and after this one in the same product
- ← EarlierCVE-2026-45834May 26, 2026 · Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_state_change_cb()22Monitor
- ← EarlierCVE-2026-45835May 26, 2026 · Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_new_connection_cb()22Monitor
- Later →CVE-2026-45837May 27, 2026 · bpf: Fix use-after-free in arena_vm_close on fork31Monitor
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 | 32bd343803d4ba47cc516f9d5f037f01b855d767 | Vendor (CNA) |
| Linux Linux | 58dc5e3d8768e121907608e6e196a908512fb083 | Vendor (CNA) |
| Linux Linux | 6e8d1a2a677a81caa60cf0aabd4217bd585fbba1 | Vendor (CNA) |
| Linux Linux | 78a88d43dab8d23aeef934ed8ce34d40e6b3d613 | Vendor (CNA) |
| Linux Linux | a93d66907dd4d29b65c9797a93784bf61906d6d6 | Vendor (CNA) |
| Linux Linux | cf1fd517f892ded88168df878f834b625133f86d | Vendor (CNA) |
| Linux Linux | e1863e7480feddb90125d0dd5a1b572972d75908 | Vendor (CNA) |
| Linux Linux | fd072f833147b0bc10c43a454624cb99d02f3fc7 | 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:dtb-aarch64 | 6.12.0-160000.39.1 · openSUSE:Leap 16.0 | Package registry (OSV) |
| opensuse:kernel-64kb | 6.12.0-160000.39.1 · openSUSE:Leap 16.0 | Package registry (OSV) |
| opensuse:kernel-azure | 6.12.0-160000.39.1 · openSUSE:Leap 16.0 | Package registry (OSV) |
| opensuse:kernel-default | 6.12.0-160000.39.1 · openSUSE:Leap 16.0 | Package registry (OSV) |
| opensuse:kernel-default-base | 6.12.0-160000.39.1.160000.2.25 · openSUSE:Leap 16.0 | Package registry (OSV) |
| opensuse:kernel-docs | 6.12.0-160000.39.1 · openSUSE:Leap 16.0 | Package registry (OSV) |
| opensuse:kernel-kvmsmall | 6.12.0-160000.39.1 · openSUSE:Leap 16.0 | Package registry (OSV) |
| opensuse:kernel-obs-build | 6.12.0-160000.39.1 · openSUSE:Leap 16.0 | Package registry (OSV) |
| opensuse:kernel-obs-qa | 6.12.0-160000.39.1 · openSUSE:Leap 16.0 | Package registry (OSV) |
| opensuse:kernel-rt | 6.12.0-160000.39.1 · openSUSE:Leap 16.0 | Package registry (OSV) |
| opensuse:kernel-source | 7.0.11-1.1 · openSUSE:Tumbleweed | Package registry (OSV) |
| opensuse:kernel-syms | 6.12.0-160000.39.1 · openSUSE:Leap 16.0 | Package registry (OSV) |
| suse:kernel-64kb | 6.12.0-160000.39.1 · SUSE:Linux Micro 6.2 | Package registry (OSV) |
| suse:kernel-64kb | 6.4.0-150700.53.84.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP7 | Package registry (OSV) |
| suse:kernel-azure | 6.12.0-160000.39.1 · SUSE:Linux Enterprise Server 16.0 | Package registry (OSV) |
| suse:kernel-default | 4.12.14-122.333.2 · SUSE:Linux Enterprise Live Patching 12 SP5 | Package registry (OSV) |
| suse:kernel-default | 6.4.0-159998.53.1 · SUSE:Linux Micro 6.1 | Package registry (OSV) |
| suse:kernel-default-base | 6.4.0-150700.53.84.1.150700.17.47.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP7 | Package registry (OSV) |
| suse:kernel-default-base | 6.4.0-159998.53.1.159998.21.38 · SUSE:Linux Micro 6.1 | Package registry (OSV) |
| suse:kernel-docs | 6.12.0-160000.39.1 · SUSE:Linux Enterprise Server 16.0 | Package registry (OSV) |
+16
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.
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 researchersFinders, 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 DereferenceCVSS 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✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (8 more)Show less
- git.kernel.org/stable/c/58dc5e3d8768e121907608e6e196a908512fb083
- git.kernel.org/stable/c/6e8d1a2a677a81caa60cf0aabd4217bd585fbba1
- git.kernel.org/stable/c/78a88d43dab8d23aeef934ed8ce34d40e6b3d613
- git.kernel.org/stable/c/a93d66907dd4d29b65c9797a93784bf61906d6d6
- git.kernel.org/stable/c/cf1fd517f892ded88168df878f834b625133f86d
- git.kernel.org/stable/c/e1863e7480feddb90125d0dd5a1b572972d75908
- git.kernel.org/stable/c/fd072f833147b0bc10c43a454624cb99d02f3fc7
- cert-portal.siemens.com/productcert/html/ssa-784472.html
Vendor advisories and official records. Exploit/PoC links are deliberately left out.