Answer in brief
CVE-2026-46321 records a High severity (CVSS 7.1) vulnerability in tun: free page on short-frame rejection in tun_xdp_one(). The current sources do not mark it as known exploited. The current feed maps 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 7.1. 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). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=6100e0237204890269e3f934acfc50d35fd6f319 <0a6f46a9332ad6958992d64d3b3a81a80b2ca940 || >=589382f50b4a5d90d16d8bc9dcbc0e927a3e39b2 <0e8211fcf9426f5adddf32516ba0f400ceb9544d || >=ad6b3f622ccfb4bfedfa53b6ebd91c3d1d04f146 <e915445942af6dcea628bf66d6241641201a0c41 || >=d5ad89b7d01ed4e66fd04734fc63d6e78536692a <5b34f9e4fe2f203724a6e893d6df0316b9670057 || >=049584807f1d797fc3078b68035450a9769eb5c3 <69863ff2720a0e9871f1a5710f2a33a94217fee0 || >=049584807f1d797fc3078b68035450a9769eb5c3 <37a1c268c2c8090bf4dc552d732bd23ba36f8eb0 || >=049584807f1d797fc3078b68035450a9769eb5c3 <98c67be9eb9de72465a071949e84a3cdb8fab5a3 || >=049584807f1d797fc3078b68035450a9769eb5c3 <f4feb1e20058e407cb00f45aff47f5b7e19a6bbf || 32b0aaba5dbc85816898167d9b5d45a22eae82e9 || a9d1c27e2ee3b0ea5d40c105d6e728fc114470bb || 8418f55302fa1d2eeb73e16e345167e545c598a5 || >=5.10.223 <5.10.259 || >=5.15.164 <5.15.210 || >=6.1.102 <6.1.176 || >=6.6.43 <6.6.143 || >=5.4.281 <5.5 || >=6.9.12 <6.10 || >=6.10.2 <6.11 | 0a6f46a9332ad6958992d64d3b3a81a80b2ca940, 0e8211fcf9426f5adddf32516ba0f400ceb9544d, e915445942af6dcea628bf66d6241641201a0c41, 5b34f9e4fe2f203724a6e893d6df0316b9670057, 69863ff2720a0e9871f1a5710f2a33a94217fee0, 37a1c268c2c8090bf4dc552d732bd23ba36f8eb0, 98c67be9eb9de72465a071949e84a3cdb8fab5a3, f4feb1e20058e407cb00f45aff47f5b7e19a6bbf, 5.10.259, 5.15.210, 6.1.176, 6.6.143, 5.5, 6.10, 6.11 |
| Linux/Linuxgeneric | 6.11 | Not reported |
Published upstream
Jun 9, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 19, 2026
In the Linux kernel, the following vulnerability has been resolved: tun: free page on short-frame rejection in tun_xdp_one() tun_xdp_one() returns -EINVAL on a frame shorter than ETH_HLEN without freeing the page that vhost_net_build_xdp() allocated for it. tun_sendmsg() discards that -EINVAL and still returns total_len, so vhost_tx_batch() takes the success path and never frees the page; each short frame in a batch leaks one page-frag chunk. A local process that can open /dev/net/tun and /dev/vhost-net can hit this path: it attaches a tun/tap device as the vhost-net backend and feeds TX descriptors whose length minus the virtio-net header is below ETH_HLEN. Each kick leaks the page-frag chunks for that batch, and a tight submission loop exhausts host memory and triggers an OOM panic. Free the page before returning -EINVAL, matching the XDP-program error path in the same function.
Quoted source text, attributed separately from HOL analysis.