CVE-2026-31738: vxlan: validate ND option lengths in vxlan_na_create
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 2029712fb2c87e9a8c75094906f2ee29bf08c500, 3.13, 3.14.
Low priority for now. Upgrade to Linux Linux 2029712fb2c87e9a8c75094906f2ee29bf08c500, 3.13, 3.14 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: vxlan: validate ND option lengths in vxlan_na_create vxlan_na_create() walks ND options according to option-provided lengths. A malformed option can make the parser advance beyond the computed option span or use a too-short source LLADDR option payload. Validate option lengths against the remaining NS option area before advancing, and only read source LLADDR when the option is large enough for an Ethernet address.
- BDU:2026-10903
- SUSE-SU-2026:22964-1
- SUSE-SU-2026:22965-1
- SUSE-SU-2026:22966-1
- SUSE-SU-2026:22967-1
- SUSE-SU-2026:22968-1
- SUSE-SU-2026:22969-1
- SUSE-SU-2026:22970-1
- SUSE-SU-2026:22971-1
- SUSE-SU-2026:22972-1
- SUSE-SU-2026:22973-1
- SUSE-SU-2026:22974-1
- SUSE-SU-2026:22975-1
- SUSE-SU-2026:22983-1
- SUSE-SU-2026:22984-1
- SUSE-SU-2026:22985-1
- SUSE-SU-2026:22986-1
- SUSE-SU-2026:22987-1
- SUSE-SU-2026:22988-1
- SUSE-SU-2026:22989-1
- Published
- May 1, 2026
- Updated
- Nov 11, 2026
- EPSS
- 0.1% · 2th percentile
- CWE
- —
Report tools
Action score
22
Low priority for now.
- CVSS
- 22 / 40 · 5.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.1%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
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.
Is your version affected? Check itNoroxi 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 kernel3.12.18 and later · before 3.13
- linux linux kernel3.13.10 and later · before 3.14
- linux linux kernel3.14.1 and later · before 5.10.253
- linux linux kernel5.11 and later · before 5.15.203
- linux linux kernel5.16 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 kernel3.14
- 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
- d8be18c52dbc94989f6d74637b731af39cd3d902, 3927dace523706cc00f808520eaf2125dd7c07b5, 3.14affected
- 4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa and later · before 901c1dd3bab2955d7e664f914c374c8c3ac2b958affected · git
- 4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa and later · before e476745917a1e288eb15e7ff49d286a86a4861d3affected · git
- 4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa and later · before 2029712fb2c87e9a8c75094906f2ee29bf08c500affected · git
- 4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa and later · before 602596c69a70e50d9ab8c6ae0290a01f88229dd7affected · git
- 4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa and later · before de20d2e3b9179d132f5f5b44e490d7c916c6321baffected · git
- 4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa and later · before eddfce70a6f3107d1679b0c2fcbeb96b593bd679affected · git
- 4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa and later · before b69c4236255bd8de16cd876e58c6f0867d1d78b1affected · git
- 4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa and later · before afa9a05e6c4971bd5586f1b304e14d61fb3d9385affected · git
- 3.12.18 and later · before 3.13affected · 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 Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_76 | before 11-2.1 | 11-2.1 |
| SUSE:Linux Enterprise Live Patching 15 SP4 | kernel-livepatch-SLE15-SP4_Update_50 | before 7-150400.2.1 | 7-150400.2.1 |
| SUSE:Linux Enterprise Live Patching 15 SP4 | kernel-livepatch-SLE15-SP4_Update_51 | before 6-150400.2.1 | 6-150400.2.1 |
| SUSE:Linux Enterprise Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5_Update_28 | before 21-150500.2.1 | 21-150500.2.1 |
| SUSE:Linux Enterprise Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5_Update_38 | before 6-150500.2.1 | 6-150500.2.1 |
| SUSE:Linux Enterprise Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6_Update_18 | before 10-150600.2.1 | 10-150600.2.1 |
| SUSE:Linux Enterprise Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6_Update_19 | before 10-150600.2.1 | 10-150600.2.1 |
| SUSE:Linux Enterprise Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6_Update_25 | before 4-150600.2.1 | 4-150600.2.1 |
| SUSE:Linux Enterprise Live Patching 15 SP7 | kernel-livepatch-SLE15-SP7_Update_12 | before 6-150700.2.1 | 6-150700.2.1 |
| SUSE:Linux Enterprise Live Patching 15 SP7 | kernel-livepatch-SLE15-SP7_Update_14 | before 4-150700.2.1 | 4-150700.2.1 |
| SUSE:Linux Enterprise Live Patching 15 SP7 | kernel-livepatch-SLE15-SP7_Update_3 | before 15-150700.2.1 | 15-150700.2.1 |
| SUSE:Linux Enterprise Live Patching 15 SP7 | kernel-livepatch-SLE15-SP7_Update_5 | before 12-150700.2.1 | 12-150700.2.1 |
| SUSE:Linux Enterprise Live Patching 15 SP7 | kernel-livepatch-SLE15-SP7_Update_6 | before 10-150700.2.1 | 10-150700.2.1 |
| SUSE:Linux Enterprise Live Patching 15 SP7 | kernel-livepatch-SLE15-SP7_Update_9 | before 9-150700.2.1 | 9-150700.2.1 |
| SUSE:Linux Enterprise Live Patching 15 SP7 | kernel-livepatch-SLE15-SP7-RT_Update_14 | before 4-150700.2.1 | 4-150700.2.1 |
| SUSE:Linux Micro 6.0 | kernel-livepatch-MICRO-6-0_Update_10 | before 15-1.1 | 15-1.1 |
| SUSE:Linux Micro 6.0 | kernel-livepatch-MICRO-6-0_Update_11 | before 14-1.1 | 14-1.1 |
| SUSE:Linux Micro 6.0 | kernel-livepatch-MICRO-6-0_Update_12 | before 14-1.1 | 14-1.1 |
| SUSE:Linux Micro 6.0 | kernel-livepatch-MICRO-6-0_Update_13 | before 12-1.1 | 12-1.1 |
| SUSE:Linux Micro 6.0 | kernel-livepatch-MICRO-6-0_Update_14 | before 10-1.2 | 10-1.2 |
| SUSE:Linux Micro 6.0 | kernel-livepatch-MICRO-6-0_Update_16 | before 9-1.1 | 9-1.1 |
+43
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-2026-31736May 1, 2026 · net: ethernet: mtk_ppe: avoid NULL deref when gmac0 is disabled22Monitor
- ← EarlierCVE-2026-31737May 1, 2026 · net: ftgmac100: fix ring allocation unwind on open failure22Monitor
- Later →CVE-2026-31739May 1, 2026 · crypto: tegra - Add missing CRYPTO_ALG_ASYNC35Monitor
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 | 2029712fb2c87e9a8c75094906f2ee29bf08c500 | Vendor (CNA) |
| Linux Linux | 3.13 | Vendor (CNA) |
| Linux Linux | 3.14 | Vendor (CNA) |
| Linux Linux | 602596c69a70e50d9ab8c6ae0290a01f88229dd7 | Vendor (CNA) |
| Linux Linux | 901c1dd3bab2955d7e664f914c374c8c3ac2b958 | Vendor (CNA) |
| Linux Linux | afa9a05e6c4971bd5586f1b304e14d61fb3d9385 | Vendor (CNA) |
| Linux Linux | b69c4236255bd8de16cd876e58c6f0867d1d78b1 | Vendor (CNA) |
| Linux Linux | de20d2e3b9179d132f5f5b44e490d7c916c6321b | Vendor (CNA) |
| Linux Linux | e476745917a1e288eb15e7ff49d286a86a4861d3 | Vendor (CNA) |
| Linux Linux | eddfce70a6f3107d1679b0c2fcbeb96b593bd679 | Vendor (CNA) |
| debian:linux | 6.1.170-1 · Debian:12 | Package registry (OSV) |
| suse:kernel-livepatch-SLE16-RT_Update_0 | 14-160000.3.4 · SUSE:Linux Micro 6.2 | Package registry (OSV) |
| suse:kernel-livepatch-SLE16-RT_Update_1 | 13-160000.1.1 · SUSE:Linux Micro 6.2 | Package registry (OSV) |
| suse:kernel-livepatch-SLE16-RT_Update_10 | 5-160000.1.1 · SUSE:Linux Micro 6.2 | Package registry (OSV) |
| suse:kernel-livepatch-SLE16-RT_Update_11 | 5-160000.1.1 · SUSE:Linux Micro 6.2 | Package registry (OSV) |
| suse:kernel-livepatch-SLE16-RT_Update_2 | 11-160000.1.1 · SUSE:Linux Micro 6.2 | Package registry (OSV) |
| suse:kernel-livepatch-SLE16-RT_Update_3 | 10-160000.1.1 · SUSE:Linux Micro 6.2 | Package registry (OSV) |
| suse:kernel-livepatch-SLE16-RT_Update_4 | 10-160000.1.1 · SUSE:Linux Micro 6.2 | Package registry (OSV) |
| suse:kernel-livepatch-SLE16-RT_Update_5 | 9-160000.1.1 · SUSE:Linux Micro 6.2 | Package registry (OSV) |
| suse:kernel-livepatch-SLE16-RT_Update_6 | 8-160000.1.1 · SUSE:Linux Micro 6.2 | Package registry (OSV) |
| suse:kernel-livepatch-SLE16-RT_Update_7 | 7-160000.1.1 · SUSE:Linux Micro 6.2 | Package registry (OSV) |
| suse:kernel-livepatch-SLE16-RT_Update_8 | 6-160000.1.1 · SUSE:Linux Micro 6.2 | Package registry (OSV) |
| suse:kernel-livepatch-SLE16-RT_Update_9 | 5-160000.1.1 · SUSE:Linux Micro 6.2 | 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).
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)
—
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
- SSVC exploitation— → none
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (7 more)Show less
- git.kernel.org/stable/c/602596c69a70e50d9ab8c6ae0290a01f88229dd7
- git.kernel.org/stable/c/901c1dd3bab2955d7e664f914c374c8c3ac2b958
- git.kernel.org/stable/c/afa9a05e6c4971bd5586f1b304e14d61fb3d9385
- git.kernel.org/stable/c/b69c4236255bd8de16cd876e58c6f0867d1d78b1
- git.kernel.org/stable/c/de20d2e3b9179d132f5f5b44e490d7c916c6321b
- git.kernel.org/stable/c/e476745917a1e288eb15e7ff49d286a86a4861d3
- git.kernel.org/stable/c/eddfce70a6f3107d1679b0c2fcbeb96b593bd679
Vendor advisories and official records. Exploit/PoC links are deliberately left out.