CVE-2026-43013: net/mlx5: lag: Check for LAG device before creating debugfs
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 7129632cab3e4d23510b21930aa73b8d97a859f5, 89c65f2fcd8801365b410f40a427cbcd7f4c28e9, a3db46d5f4df92630a96f7bc77b60e75c2353e06.
- Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).
Low priority for now. Upgrade to Linux Linux 7129632cab3e4d23510b21930aa73b8d97a859f5, 89c65f2fcd8801365b410f40a427cbcd7f4c28e9, a3db46d5f4df92630a96f7bc77b60e75c2353e06 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: net/mlx5: lag: Check for LAG device before creating debugfs __mlx5_lag_dev_add_mdev() may return 0 (success) even when an error occurs that is handled gracefully. Consequently, the initialization flow proceeds to call mlx5_ldev_add_debugfs() even when there is no valid LAG context. mlx5_ldev_add_debugfs() blindly created the debugfs directory and attributes. This exposed interfaces (like the members file) that rely on a valid ldev pointer, leading to potential NULL pointer dereferences if accessed when ldev is NULL. Add a check to verify that mlx5_lag_dev(dev) returns a valid pointer before attempting to create the debugfs entries.
- Published
- May 1, 2026
- Updated
- Jun 17, 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 kernel5.19 and later · before 6.1.168
- linux linux kernel6.2 and later · before 6.6.134
- linux linux kernel6.7 and later · before 6.12.81
- linux linux kernel6.13 and later · before 6.18.22
- linux linux kernel6.19 and later · before 6.19.12
- linux linux kernel7.0
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
- 5.19affected
- 7f46a0b7327ae261f9981888708dbca22c283900 and later · before a3db46d5f4df92630a96f7bc77b60e75c2353e06affected · git
- 7f46a0b7327ae261f9981888708dbca22c283900 and later · before 7129632cab3e4d23510b21930aa73b8d97a859f5affected · git
- 7f46a0b7327ae261f9981888708dbca22c283900 and later · before cfa774e6c920c81e700327bf10db8cb50d5db456affected · git
- 7f46a0b7327ae261f9981888708dbca22c283900 and later · before c53cf44588a93000f71817a6bb87a66353c48deeaffected · git
- 7f46a0b7327ae261f9981888708dbca22c283900 and later · before 89c65f2fcd8801365b410f40a427cbcd7f4c28e9affected · git
- 7f46a0b7327ae261f9981888708dbca22c283900 and later · before bf16bca6653679d8a514d6c1c5a2c67065033f14affected · git
- before 5.19not affected · semver
- 6.1.168 and later · up to and including 6.1.*not affected · semver
- 6.6.134 and later · up to and including 6.6.*not 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 6.1.170-1 | 6.1.170-1 |
| Debian:13 | linux | before 6.12.85-1 | 6.12.85-1 |
| Debian:14 | linux | before 6.19.12-1 | 6.19.12-1 |
| SUSE:Linux Enterprise Server 16.0 | kernel-azure | before 6.12.0-160000.34.1 | 6.12.0-160000.34.1 |
| SUSE:Linux Enterprise Server 16.0 | kernel-docs | before 6.12.0-160000.34.1 | 6.12.0-160000.34.1 |
| SUSE:Linux Enterprise Server 16.0 | kernel-kvmsmall | before 6.12.0-160000.34.1 | 6.12.0-160000.34.1 |
| SUSE:Linux Enterprise Server 16.0 | kernel-obs-qa | before 6.12.0-160000.34.1 | 6.12.0-160000.34.1 |
| SUSE:Linux Enterprise Server 16.0 | kernel-zfcpdump | before 6.12.0-160000.34.1 | 6.12.0-160000.34.1 |
| SUSE:Linux Micro 6.2 | kernel-64kb | before 6.12.0-160000.34.1 | 6.12.0-160000.34.1 |
| SUSE:Linux Micro 6.2 | kernel-default | before 6.12.0-160000.34.1 | 6.12.0-160000.34.1 |
| SUSE:Linux Micro 6.2 | kernel-default-base | before 6.12.0-160000.34.1.160000.2.15 | 6.12.0-160000.34.1.160000.2.15 |
| SUSE:Linux Micro 6.2 | kernel-rt | before 6.12.0-160000.34.1 | 6.12.0-160000.34.1 |
| SUSE:Linux Micro 6.2 | kernel-source | before 6.12.0-160000.34.1 | 6.12.0-160000.34.1 |
| SUSE:Linux Micro Extras 6.2 | kernel-obs-build | before 6.12.0-160000.34.1 | 6.12.0-160000.34.1 |
| SUSE:Linux Micro Extras 6.2 | kernel-syms | before 6.12.0-160000.34.1 | 6.12.0-160000.34.1 |
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-2026-43008May 1, 2026 · gpio: qixis-fpga: Fix error handling for devm_regmap_init_mmio()22Monitor
- ← EarlierCVE-2026-43012May 1, 2026 · net/mlx5: Fix switchdev mode rollback in case of failure22Monitor
- Later →CVE-2026-43014May 1, 2026 · net: macb: properly unregister fixed rate clocks22Monitor
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 | 7129632cab3e4d23510b21930aa73b8d97a859f5 | Vendor (CNA) |
| Linux Linux | 89c65f2fcd8801365b410f40a427cbcd7f4c28e9 | Vendor (CNA) |
| Linux Linux | a3db46d5f4df92630a96f7bc77b60e75c2353e06 | Vendor (CNA) |
| Linux Linux | bf16bca6653679d8a514d6c1c5a2c67065033f14 | Vendor (CNA) |
| Linux Linux | c53cf44588a93000f71817a6bb87a66353c48dee | Vendor (CNA) |
| Linux Linux | cfa774e6c920c81e700327bf10db8cb50d5db456 | Vendor (CNA) |
| debian:linux | 6.1.170-1 · Debian:12 | Package registry (OSV) |
| suse:kernel-64kb | 6.12.0-160000.34.1 · SUSE:Linux Micro 6.2 | Package registry (OSV) |
| suse:kernel-azure | 6.12.0-160000.34.1 · SUSE:Linux Enterprise Server 16.0 | Package registry (OSV) |
| suse:kernel-default | 6.12.0-160000.34.1 · SUSE:Linux Micro 6.2 | Package registry (OSV) |
| suse:kernel-default-base | 6.12.0-160000.34.1.160000.2.15 · SUSE:Linux Micro 6.2 | Package registry (OSV) |
| suse:kernel-docs | 6.12.0-160000.34.1 · SUSE:Linux Enterprise Server 16.0 | Package registry (OSV) |
| suse:kernel-kvmsmall | 6.12.0-160000.34.1 · SUSE:Linux Enterprise Server 16.0 | Package registry (OSV) |
| suse:kernel-obs-build | 6.12.0-160000.34.1 · SUSE:Linux Micro Extras 6.2 | Package registry (OSV) |
| suse:kernel-obs-qa | 6.12.0-160000.34.1 · SUSE:Linux Enterprise Server 16.0 | Package registry (OSV) |
| suse:kernel-rt | 6.12.0-160000.34.1 · SUSE:Linux Micro 6.2 | Package registry (OSV) |
| suse:kernel-source | 6.12.0-160000.34.1 · SUSE:Linux Micro 6.2 | Package registry (OSV) |
| suse:kernel-syms | 6.12.0-160000.34.1 · SUSE:Linux Micro Extras 6.2 | Package registry (OSV) |
| suse:kernel-zfcpdump | 6.12.0-160000.34.1 · SUSE:Linux Enterprise Server 16.0 | 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.
No history yet (it accumulates with the daily EPSS job).
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).
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-26-0143 · May 4, 2026(Linux Kernel Güvenlik Bildirimi)
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 (5 more)Show less
- git.kernel.org/stable/c/89c65f2fcd8801365b410f40a427cbcd7f4c28e9
- git.kernel.org/stable/c/a3db46d5f4df92630a96f7bc77b60e75c2353e06
- git.kernel.org/stable/c/bf16bca6653679d8a514d6c1c5a2c67065033f14
- git.kernel.org/stable/c/c53cf44588a93000f71817a6bb87a66353c48dee
- git.kernel.org/stable/c/cfa774e6c920c81e700327bf10db8cb50d5db456
Vendor advisories and official records. Exploit/PoC links are deliberately left out.