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CVE-2026-74708

xsk: validate launch-time metadata size

HIGH
7.8
CVSS Score
Published: August 22, 2026 at 03:33 PM UTC
Updated: October 16, 2026 at 08:17 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH7.8
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: xsk: validate launch-time metadata size Launch-time metadata extends beyond the first 16 bytes of struct xsk_tx_metadata. Reject the request when the registered metadata area does not contain the complete field. Snapshot the validated flags for the generic transmit path and use that snapshot for request and completion processing, avoiding inconsistent decisions if user space changes the flags concurrently. Note that only xsk_skb_metadata is properly using the flags, __xsk_buff_get_metadata ignores them. Next commits address that.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
90%
6.14.26.15ca4419f15abd19ba8be1e109661b60f9f5b6c9f0d9d736c416c9a85f84e15435ba82a177262e745b
Vendor states this is fixed in 439ce2dddf3d22129b9113a7881637256a35e936 (fixed)
Vendor states this is fixed in af511afa1d2977f384044df78d6fbf9fba653f7a (fixed)
Vendor states this is fixed in bc63d47611c07b0d5d655fe1a590861931527920 (fixed)
Vendor states this is fixed in 6.15 (unaffected)
Vendor states this is fixed in 6.18.45 (unaffected)
Vendor states this is fixed in 7.1.9 (unaffected)
Vendor states this is fixed in 7.2 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (3)

Source: cverecord
https://git.kernel.org/stable/c/af511afa1d2977f384044df78d6fbf9fba653f7a
Source: cverecord
https://git.kernel.org/stable/c/bc63d47611c07b0d5d655fe1a590861931527920
Source: cverecord
https://git.kernel.org/stable/c/439ce2dddf3d22129b9113a7881637256a35e936

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHLinux
Vector?

Quick Info

StatusRECEIVED

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