CVE-2026-46321
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
tun: free page on short-frame rejection in tun_xdp_one()
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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 6100e0237204890269e3f934acfc50d35fd6f319 | affected | git | 0a6f46a9332ad6958992d64d3b3a81a80b2ca940 | Unavailable | None listed |
| 589382f50b4a5d90d16d8bc9dcbc0e927a3e39b2 | affected | git | 0e8211fcf9426f5adddf32516ba0f400ceb9544d | Unavailable | None listed |
| ad6b3f622ccfb4bfedfa53b6ebd91c3d1d04f146 | affected | git | e915445942af6dcea628bf66d6241641201a0c41 | Unavailable | None listed |
| d5ad89b7d01ed4e66fd04734fc63d6e78536692a | affected | git | 5b34f9e4fe2f203724a6e893d6df0316b9670057 | Unavailable | None listed |
| 049584807f1d797fc3078b68035450a9769eb5c3 | affected | git | 69863ff2720a0e9871f1a5710f2a33a94217fee0 | Unavailable | None listed |
| 049584807f1d797fc3078b68035450a9769eb5c3 | affected | git | 37a1c268c2c8090bf4dc552d732bd23ba36f8eb0 | Unavailable | None listed |
| 049584807f1d797fc3078b68035450a9769eb5c3 | affected | git | 98c67be9eb9de72465a071949e84a3cdb8fab5a3 | Unavailable | None listed |
| 049584807f1d797fc3078b68035450a9769eb5c3 | affected | git | f4feb1e20058e407cb00f45aff47f5b7e19a6bbf | Unavailable | None listed |
| 32b0aaba5dbc85816898167d9b5d45a22eae82e9 | affected | git | Unavailable | Unavailable | None listed |
| a9d1c27e2ee3b0ea5d40c105d6e728fc114470bb | affected | git | Unavailable | Unavailable | None listed |
| 8418f55302fa1d2eeb73e16e345167e545c598a5 | affected | git | Unavailable | Unavailable | None listed |
| 5.10.223 | affected | semver | 5.10.259 | Unavailable | None listed |
| 5.15.164 | affected | semver | 5.15.210 | Unavailable | None listed |
| 6.1.102 | affected | semver | 6.1.176 | Unavailable | None listed |
| 6.6.43 | affected | semver | 6.6.143 | Unavailable | None listed |
| 5.4.281 | affected | semver | 5.5 | Unavailable | None listed |
| 6.9.12 | affected | semver | 6.10 | Unavailable | None listed |
| 6.10.2 | affected | semver | 6.11 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 6.11 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 6.11 | Unavailable | None listed |
| 5.10.259 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.210 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.176 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.143 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.93 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.35 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.0.12 | unaffected | semver | Unavailable | 7.0.* | None listed |
| 7.1 | unaffected | original_commit_for_fix | Unavailable | * | None listed |