xfrm: xfrm_interface: require CAP_NET_ADMIN in the device netns for changelink
In the Linux kernel, the following vulnerability has been resolved: xfrm: xfrm_interface: require CAP_NET_ADMIN in the device netns for changelink xfrmi_changelink() operates on at most two netns, dev_net(dev) and the interface link netns xi->net. They differ once the device is created in or moved to a netns other than the one the request runs in. The rtnl changelink path checks CAP_NET_ADMIN only against dev_net(dev), so a caller privileged there but not in xi->net can rewrite an interface that lives in xi->net. Gate xfrmi_changelink() on rtnl_dev_link_net_capable() at its top, before any attribute is parsed.
- Published
- Aug 15, 2026
- Updated
- Aug 17, 2026
- EPSS
- 0.2% · 6th percentile
- CWE
- —
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Report tools
Action score
35
Monitor
Low priority for now.
- CVSS
- 35 / 40 · 8.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.2%
CNA vs NVD score
- NVD
- —
- CNA · Linux
- 8.8
- NVD has not scored this yet; the score shown is the CNA’s.
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
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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
- 4.19affected
- f203b76d78092faf248db3f851840fbecf80b40e and later · before 04c1aa57d08471b1953bf27c84ac9b3d78d71831affected · git
- f203b76d78092faf248db3f851840fbecf80b40e and later · before bdfd1c21d90e628a58a9de79e024cdfcbedfa15caffected · git
- f203b76d78092faf248db3f851840fbecf80b40e and later · before 80ec68bba11f7f387c0e4099c2d7b2c84943eb99affected · git
- f203b76d78092faf248db3f851840fbecf80b40e and later · before e9c90756f10da334fb31552e52c61f1dba69f491affected · git
- f203b76d78092faf248db3f851840fbecf80b40e and later · before 37b61946d278c7deb0d40ba8f2b6fc0478d61dabaffected · git
- f203b76d78092faf248db3f851840fbecf80b40e and later · before 8ca2a19a987a7d1cb4c916ed9723a1c6993b4276affected · git
- f203b76d78092faf248db3f851840fbecf80b40e and later · before 3ba2b2ef7d6a63b190f15cfc2b4ba0fba59928eaaffected · git
- f203b76d78092faf248db3f851840fbecf80b40e and later · before 095515d89b19b6cc19dfcdc846f97403ed1ebce3affected · git
- before 4.19not 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 6.1.180-1 | 6.1.180-1 |
| Debian:13 | linux | before 6.12.100-1 | 6.12.100-1 |
| Debian:14 | linux | before 7.1.5-1 | 7.1.5-1 |
Same product
linux: all recordsOther highest-scoring records for the same primary product.
- CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation40Plan
- CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment40Plan
- CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()40Plan
- CVE-2026-74309vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler40Plan
- CVE-2026-74280crypto: marvell/octeontx - fix DMA cleanup using wrong loop index40Plan
- CVE-2026-74279crypto: cavium/cpt - fix DMA cleanup using wrong loop index40Plan
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 | 04c1aa57d08471b1953bf27c84ac9b3d78d71831 | Vendor (CNA) |
| Linux Linux | 095515d89b19b6cc19dfcdc846f97403ed1ebce3 | Vendor (CNA) |
| Linux Linux | 37b61946d278c7deb0d40ba8f2b6fc0478d61dab | Vendor (CNA) |
| Linux Linux | 3ba2b2ef7d6a63b190f15cfc2b4ba0fba59928ea | Vendor (CNA) |
| Linux Linux | 80ec68bba11f7f387c0e4099c2d7b2c84943eb99 | Vendor (CNA) |
| Linux Linux | 8ca2a19a987a7d1cb4c916ed9723a1c6993b4276 | Vendor (CNA) |
| Linux Linux | bdfd1c21d90e628a58a9de79e024cdfcbedfa15c | Vendor (CNA) |
| Linux Linux | e9c90756f10da334fb31552e52c61f1dba69f491 | Vendor (CNA) |
| debian:linux | 6.1.180-1 · Debian:12 | 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.
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
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
Impact can extend beyond the vulnerable component (scope changes).
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Changed
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
—
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
nvd-secondary
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.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- git.kernel.org/stable/c/04c1aa57d08471b1953bf27c84ac9b3d78d71831
- git.kernel.org/stable/c/095515d89b19b6cc19dfcdc846f97403ed1ebce3
- git.kernel.org/stable/c/37b61946d278c7deb0d40ba8f2b6fc0478d61dab
- git.kernel.org/stable/c/3ba2b2ef7d6a63b190f15cfc2b4ba0fba59928ea
- git.kernel.org/stable/c/80ec68bba11f7f387c0e4099c2d7b2c84943eb99
- git.kernel.org/stable/c/8ca2a19a987a7d1cb4c916ed9723a1c6993b4276
- git.kernel.org/stable/c/bdfd1c21d90e628a58a9de79e024cdfcbedfa15c
- git.kernel.org/stable/c/e9c90756f10da334fb31552e52c61f1dba69f491
Vendor advisories and official records. Exploit/PoC links are deliberately left out.