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URL: https://nvd.nist.gov/vuln/detail/CVE-2026-46321

⇱ NVD - CVE-2026-46321

  1. Vulnerabilities

CVE-2026-46321 Detail

Received

This CVE record has recently been published to the CVE List and has been included within the NVD dataset.

Description

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.


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CVSS 4.0 Severity and Vector Strings:

NVD assessment not yet provided.

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/0a6f46a9332ad6958992d64d3b3a81a80b2ca940 kernel.org
https://git.kernel.org/stable/c/0e8211fcf9426f5adddf32516ba0f400ceb9544d kernel.org
https://git.kernel.org/stable/c/37a1c268c2c8090bf4dc552d732bd23ba36f8eb0 kernel.org
https://git.kernel.org/stable/c/5b34f9e4fe2f203724a6e893d6df0316b9670057 kernel.org
https://git.kernel.org/stable/c/69863ff2720a0e9871f1a5710f2a33a94217fee0 kernel.org
https://git.kernel.org/stable/c/98c67be9eb9de72465a071949e84a3cdb8fab5a3 kernel.org
https://git.kernel.org/stable/c/e915445942af6dcea628bf66d6241641201a0c41 kernel.org
https://git.kernel.org/stable/c/f4feb1e20058e407cb00f45aff47f5b7e19a6bbf kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

4 change records found show changes

CVE Modified by kernel.org 6/19/2026 9:16:36 AM

Action Type Old Value New Value
Added Reference 
https://git.kernel.org/stable/c/0a6f46a9332ad6958992d64d3b3a81a80b2ca940
Added Reference 
https://git.kernel.org/stable/c/0e8211fcf9426f5adddf32516ba0f400ceb9544d
Added Reference 
https://git.kernel.org/stable/c/5b34f9e4fe2f203724a6e893d6df0316b9670057
Added Reference 
https://git.kernel.org/stable/c/e915445942af6dcea628bf66d6241641201a0c41
Changed Affected Record truncated, showing 2048 of 2717 characters.
View Entire Change Record
[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["drivers/net/tun.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"049584807f1d797fc3078b68035450a9769eb5c3","lessThan":"69863ff2720a0e9871f1a5710f2a33a94217fee0","versionType":"git","status":"affected"},{"version":"049584807f1d797fc3078b68035450a9769eb5c3","lessThan":"37a1c268c2c8090bf4dc552d732bd23ba36f8eb0","versionType":"git","status":"affected"},{"version":"049584807f1d797fc3078b68035450a9769eb5c3","lessThan":"98c67be9eb9de72465a071949e84a3cdb8fab5a3","versionType":"git","status":"affected"},{"version":"049584807f1d797fc3078b68035450a9769eb5c3","lessThan":"f4feb1e20058e407cb00f45aff47f5b7e19a6bbf","versionType":"git","status":"affected"},{"version":"32b0aaba5dbc85816898167d9b5d45a22eae82e9","versionType":"git","status":"affected"},{"version":"6100e0237204890269e3f934acfc50d35fd6f319","versionType":"git","status":"affected"},{"version":"589382f50b4a5d90d16d8bc9dcbc0e927a3e39b2","versionType":"git","status":"affected"},{"version":"ad6b3f622ccfb4bfedfa53b6ebd91c3d1d04f146","versionType":"git","status":"affected"},{"version":"d5ad89b7d01ed4e66fd04734fc63d6e78536692a","versionType":"git","status":"affected"},{"version":"a9d1c27e2ee3b0ea5d40c105d6e728fc114470bb","versionType":"git","status":"affected"},{"version":"8418f55302fa1d2eeb73e16e345167e545c598a5","versionType":"git","status":"affected"},{"version":"5.4.281","lessThan":"5.5","versionType":"semver","status":"affected"},{"version":"5.10.223","lessThan":"5.11","versionType":"semver","status":"affected"},{"version":"5.15.164","lessThan":"5.16","versionType":"semver","status":"affected"},{"version":"6.1.102","lessThan":"6.2","versionType":"semver","status":"affected"},{"version":"6.6.43","lessThan":"6.7","versionType":"semver","status":"affected"},{"version":"6.9.12","lessThan":"6.10","versionType":"semver","status":"affected"},{"version":"6.10.2","lessThan":"6.11","versionType":"semver","status":"affected"}]},{"vendor":"Linux","
 Record truncated, showing 2048 of 3325 characters.
View Entire Change Record
[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["drivers/net/tun.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"6100e0237204890269e3f934acfc50d35fd6f319","lessThan":"0a6f46a9332ad6958992d64d3b3a81a80b2ca940","versionType":"git","status":"affected"},{"version":"589382f50b4a5d90d16d8bc9dcbc0e927a3e39b2","lessThan":"0e8211fcf9426f5adddf32516ba0f400ceb9544d","versionType":"git","status":"affected"},{"version":"ad6b3f622ccfb4bfedfa53b6ebd91c3d1d04f146","lessThan":"e915445942af6dcea628bf66d6241641201a0c41","versionType":"git","status":"affected"},{"version":"d5ad89b7d01ed4e66fd04734fc63d6e78536692a","lessThan":"5b34f9e4fe2f203724a6e893d6df0316b9670057","versionType":"git","status":"affected"},{"version":"049584807f1d797fc3078b68035450a9769eb5c3","lessThan":"69863ff2720a0e9871f1a5710f2a33a94217fee0","versionType":"git","status":"affected"},{"version":"049584807f1d797fc3078b68035450a9769eb5c3","lessThan":"37a1c268c2c8090bf4dc552d732bd23ba36f8eb0","versionType":"git","status":"affected"},{"version":"049584807f1d797fc3078b68035450a9769eb5c3","lessThan":"98c67be9eb9de72465a071949e84a3cdb8fab5a3","versionType":"git","status":"affected"},{"version":"049584807f1d797fc3078b68035450a9769eb5c3","lessThan":"f4feb1e20058e407cb00f45aff47f5b7e19a6bbf","versionType":"git","status":"affected"},{"version":"32b0aaba5dbc85816898167d9b5d45a22eae82e9","versionType":"git","status":"affected"},{"version":"a9d1c27e2ee3b0ea5d40c105d6e728fc114470bb","versionType":"git","status":"affected"},{"version":"8418f55302fa1d2eeb73e16e345167e545c598a5","versionType":"git","status":"affected"},{"version":"5.10.223","lessThan":"5.10.259","versionType":"semver","status":"affected"},{"version":"5.15.164","lessThan":"5.15.210","versionType":"semver","status":"affected"},{"version":"6.1.102","lessThan":"6.1.176","versionType":"semver","status":"affected"},{"version":"6.6.43","lessThan":"6.6.143","versionType":"semver","status":"affected"},{"version":"5.4.281","lessThan":"5.

CVE Modified by kernel.org 6/17/2026 6:53:33 AM

Action Type Old Value New Value
Added Affected Record truncated, showing 2048 of 2717 characters.
View Entire Change Record
[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["drivers/net/tun.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"049584807f1d797fc3078b68035450a9769eb5c3","lessThan":"69863ff2720a0e9871f1a5710f2a33a94217fee0","versionType":"git","status":"affected"},{"version":"049584807f1d797fc3078b68035450a9769eb5c3","lessThan":"37a1c268c2c8090bf4dc552d732bd23ba36f8eb0","versionType":"git","status":"affected"},{"version":"049584807f1d797fc3078b68035450a9769eb5c3","lessThan":"98c67be9eb9de72465a071949e84a3cdb8fab5a3","versionType":"git","status":"affected"},{"version":"049584807f1d797fc3078b68035450a9769eb5c3","lessThan":"f4feb1e20058e407cb00f45aff47f5b7e19a6bbf","versionType":"git","status":"affected"},{"version":"32b0aaba5dbc85816898167d9b5d45a22eae82e9","versionType":"git","status":"affected"},{"version":"6100e0237204890269e3f934acfc50d35fd6f319","versionType":"git","status":"affected"},{"version":"589382f50b4a5d90d16d8bc9dcbc0e927a3e39b2","versionType":"git","status":"affected"},{"version":"ad6b3f622ccfb4bfedfa53b6ebd91c3d1d04f146","versionType":"git","status":"affected"},{"version":"d5ad89b7d01ed4e66fd04734fc63d6e78536692a","versionType":"git","status":"affected"},{"version":"a9d1c27e2ee3b0ea5d40c105d6e728fc114470bb","versionType":"git","status":"affected"},{"version":"8418f55302fa1d2eeb73e16e345167e545c598a5","versionType":"git","status":"affected"},{"version":"5.4.281","lessThan":"5.5","versionType":"semver","status":"affected"},{"version":"5.10.223","lessThan":"5.11","versionType":"semver","status":"affected"},{"version":"5.15.164","lessThan":"5.16","versionType":"semver","status":"affected"},{"version":"6.1.102","lessThan":"6.2","versionType":"semver","status":"affected"},{"version":"6.6.43","lessThan":"6.7","versionType":"semver","status":"affected"},{"version":"6.9.12","lessThan":"6.10","versionType":"semver","status":"affected"},{"version":"6.10.2","lessThan":"6.11","versionType":"semver","status":"affected"}]},{"vendor":"Linux","

CVE Modified by kernel.org 6/14/2026 2:16:24 AM

Action Type Old Value New Value
Added CVSS V3.1 
AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

New CVE Received from kernel.org 6/09/2026 9:16:37 AM

Action Type Old Value New Value
Added Description 
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.
Added Reference 
https://git.kernel.org/stable/c/37a1c268c2c8090bf4dc552d732bd23ba36f8eb0
Added Reference 
https://git.kernel.org/stable/c/69863ff2720a0e9871f1a5710f2a33a94217fee0
Added Reference 
https://git.kernel.org/stable/c/98c67be9eb9de72465a071949e84a3cdb8fab5a3
Added Reference 
https://git.kernel.org/stable/c/f4feb1e20058e407cb00f45aff47f5b7e19a6bbf

Quick Info

CVE Dictionary Entry:
CVE-2026-46321
NVD Published Date:
06/09/2026
NVD Last Modified:
06/19/2026
Source:
kernel.org