Answer in brief
CVE-2026-68432 records a High severity (CVSS 8.8) vulnerability in vxlan: require CAP_NET_ADMIN in the device netns for changelink. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=8bcdc4f3a20be949df54b67e5ae2734daabb5792 <b3793d7dccb192ffff29894d11824db6251acdd5 || >=8bcdc4f3a20be949df54b67e5ae2734daabb5792 <32d10c46bfde3e9b274e9e1bd6399d0ebea8f60f || >=8bcdc4f3a20be949df54b67e5ae2734daabb5792 <730c7e5fea7f06e0cdf21c547222ec93234fd1d6 || >=8bcdc4f3a20be949df54b67e5ae2734daabb5792 <e8ad0d311e225939a9a6c745d6cc384c7364ec87 || >=8bcdc4f3a20be949df54b67e5ae2734daabb5792 <3a61bd9637f3d929aa846e4eb3d98b48c26fcb0e | b3793d7dccb192ffff29894d11824db6251acdd5, 32d10c46bfde3e9b274e9e1bd6399d0ebea8f60f, 730c7e5fea7f06e0cdf21c547222ec93234fd1d6, e8ad0d311e225939a9a6c745d6cc384c7364ec87, 3a61bd9637f3d929aa846e4eb3d98b48c26fcb0e |
| Linux/Linuxgeneric | 4.11 | Not reported |
| Linux/Linuxgeneric | >=8bcdc4f3a20be949df54b67e5ae2734daabb5792 <b95a8743e58f7efed5ddc4cb73829b66f17feab0 || >=8bcdc4f3a20be949df54b67e5ae2734daabb5792 <7465ade989ba84adc2bfa58bad3ca25d249f0f7a || >=8bcdc4f3a20be949df54b67e5ae2734daabb5792 <0aa580a8bbbed2507b4582a1f0ef581d480d06ed || >=8bcdc4f3a20be949df54b67e5ae2734daabb5792 <b3793d7dccb192ffff29894d11824db6251acdd5 || >=8bcdc4f3a20be949df54b67e5ae2734daabb5792 <32d10c46bfde3e9b274e9e1bd6399d0ebea8f60f || >=8bcdc4f3a20be949df54b67e5ae2734daabb5792 <730c7e5fea7f06e0cdf21c547222ec93234fd1d6 || >=8bcdc4f3a20be949df54b67e5ae2734daabb5792 <e8ad0d311e225939a9a6c745d6cc384c7364ec87 || >=8bcdc4f3a20be949df54b67e5ae2734daabb5792 <3a61bd9637f3d929aa846e4eb3d98b48c26fcb0e | b95a8743e58f7efed5ddc4cb73829b66f17feab0, 7465ade989ba84adc2bfa58bad3ca25d249f0f7a, 0aa580a8bbbed2507b4582a1f0ef581d480d06ed, b3793d7dccb192ffff29894d11824db6251acdd5, 32d10c46bfde3e9b274e9e1bd6399d0ebea8f60f, 730c7e5fea7f06e0cdf21c547222ec93234fd1d6, e8ad0d311e225939a9a6c745d6cc384c7364ec87, 3a61bd9637f3d929aa846e4eb3d98b48c26fcb0e |
Published upstream
Aug 12, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 12, 2026
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).
Quoted source text, attributed separately from HOL analysis.