CVE-2026-68432vxlan: require CAP_NET_ADMIN in the device netns for changelink
- 8.8HighCVSS base score
- 0.15%Exploitation in 30 daysEPSS · top 96% 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: vxlan: 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 vxlan->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 vxlan->net can rewrite a vxlan device whose underlay lives in vxlan->net. vxlan_changelink() validates and applies the new configuration against vxlan->net (vxlan_config_validate(vxlan->net, ...)) and can reopen the underlay socket in that netns, so the same reasoning as the tunnel changelink series applies here. Gate vxlan_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
- 13 days later
· 13 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)
- 0.15% · top 96% of all CVEs (14 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 8bcdc4f3a20be949df54b67e5ae2734daabb5792 – < b95a8743e58f7efed5ddc4cb73829b66f17feab0
- affected 8bcdc4f3a20be949df54b67e5ae2734daabb5792 – < 7465ade989ba84adc2bfa58bad3ca25d249f0f7a
- affected 8bcdc4f3a20be949df54b67e5ae2734daabb5792 – < 0aa580a8bbbed2507b4582a1f0ef581d480d06ed
- affected 8bcdc4f3a20be949df54b67e5ae2734daabb5792 – < b3793d7dccb192ffff29894d11824db6251acdd5
- affected 8bcdc4f3a20be949df54b67e5ae2734daabb5792 – < 32d10c46bfde3e9b274e9e1bd6399d0ebea8f60f
- affected 8bcdc4f3a20be949df54b67e5ae2734daabb5792 – < 730c7e5fea7f06e0cdf21c547222ec93234fd1d6
- affected 8bcdc4f3a20be949df54b67e5ae2734daabb5792 – < e8ad0d311e225939a9a6c745d6cc384c7364ec87
- affected 8bcdc4f3a20be949df54b67e5ae2734daabb5792 – < 3a61bd9637f3d929aa846e4eb3d98b48c26fcb0e
- affected 4.11
- unaffected < 4.11
- 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/b95a8743e58f7efed5ddc4cb73829b66f17feab0 (opens in a new tab)
- https://git.kernel.org/stable/c/7465ade989ba84adc2bfa58bad3ca25d249f0f7a (opens in a new tab)
- https://git.kernel.org/stable/c/0aa580a8bbbed2507b4582a1f0ef581d480d06ed (opens in a new tab)
- https://git.kernel.org/stable/c/b3793d7dccb192ffff29894d11824db6251acdd5 (opens in a new tab)
- https://git.kernel.org/stable/c/32d10c46bfde3e9b274e9e1bd6399d0ebea8f60f (opens in a new tab)
- https://git.kernel.org/stable/c/730c7e5fea7f06e0cdf21c547222ec93234fd1d6 (opens in a new tab)
- https://git.kernel.org/stable/c/e8ad0d311e225939a9a6c745d6cc384c7364ec87 (opens in a new tab)
- https://git.kernel.org/stable/c/3a61bd9637f3d929aa846e4eb3d98b48c26fcb0e (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-2026-57040 (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)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-68432)Record last updated .