CVE-2026-68142geneve: require CAP_NET_ADMIN in the device netns for changelink
- 8.8HighCVSS base score
- 0.12%Exploitation in 30 daysEPSS · top 98% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: geneve: require CAP_NET_ADMIN in the device netns for changelink A tunnel changelink() operates on at most two netns, dev_net(dev) and the sticky underlay netns geneve->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 geneve->net can rewrite a geneve device whose underlay lives in geneve->net. geneve_changelink() applies the new configuration against geneve->net: geneve_link_config() and the geneve_quiesce()/geneve_unquiesce() pair reopen the underlay sockets in that netns (geneve_sock_add() uses geneve->net), so the same reasoning as the tunnel changelink series applies here. Gate geneve_changelink() with rtnl_dev_link_net_capable(), at the top of the op before any attribute is parsed, matching ipgre_changelink() and the rest of the "require CAP_NET_ADMIN in the device netns for changelink" series. Found by 0sec automated security-research tooling (https://0sec.ai).
Timeline
ID reserved
By Linux
- 11 days later
· 11 days later
Published
- 2 months later
· 2 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High8.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High8.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.12% · top 98% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.
Affected products
- affected 5b861f6baa3a22a48d7a4ad0ce38a223d36c978a – < a5522963c57f12df5f9db804ebfc472b58eef0ae
- affected 5b861f6baa3a22a48d7a4ad0ce38a223d36c978a – < 278c6a31ee27c931c722202c8c06cc3253923254
- affected 5b861f6baa3a22a48d7a4ad0ce38a223d36c978a – < 11a7d989d00160481a273eb4f7f05f64b5a6ffdf
- affected 5b861f6baa3a22a48d7a4ad0ce38a223d36c978a – < 2abdacc927c92fa6a9cc8341e8c9b88dcb561553
- affected 5b861f6baa3a22a48d7a4ad0ce38a223d36c978a – < 9de5518fc1fab583526a8f66b8e505c4864dc60a
- affected 5b861f6baa3a22a48d7a4ad0ce38a223d36c978a – < f8c498585d2a08aa623748353c3e61467b7e9fd2
- affected 5b861f6baa3a22a48d7a4ad0ce38a223d36c978a – < 95f45e20f1b2cec13823f0f68060ab4b2261b2c1
- affected 5b861f6baa3a22a48d7a4ad0ce38a223d36c978a – < 8efb8f8bbb353b8f2fdf4f37534c6d96c9f69e01
- affected 4.14
- unaffected < 4.14
- unaffected 5.10.265 – ≤ 5.10.*
- unaffected 5.15.216 – ≤ 5.15.*
- unaffected 6.1.183 – ≤ 6.1.*
- unaffected 6.6.148 – ≤ 6.6.*
- unaffected 6.12.101 – ≤ 6.12.*
- unaffected 6.18.42 – ≤ 6.18.*
- unaffected 7.1.6 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References8
- https://git.kernel.org/stable/c/a5522963c57f12df5f9db804ebfc472b58eef0ae (opens in a new tab)
- https://git.kernel.org/stable/c/278c6a31ee27c931c722202c8c06cc3253923254 (opens in a new tab)
- https://git.kernel.org/stable/c/11a7d989d00160481a273eb4f7f05f64b5a6ffdf (opens in a new tab)
- https://git.kernel.org/stable/c/2abdacc927c92fa6a9cc8341e8c9b88dcb561553 (opens in a new tab)
- https://git.kernel.org/stable/c/9de5518fc1fab583526a8f66b8e505c4864dc60a (opens in a new tab)
- https://git.kernel.org/stable/c/f8c498585d2a08aa623748353c3e61467b7e9fd2 (opens in a new tab)
- https://git.kernel.org/stable/c/95f45e20f1b2cec13823f0f68060ab4b2261b2c1 (opens in a new tab)
- https://git.kernel.org/stable/c/8efb8f8bbb353b8f2fdf4f37534c6d96c9f69e01 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-55525 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://cveledger.app/cve/CVE-2026-68142)Record last updated .