CVE-2026-74708
xsk: validate launch-time metadata size
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.
INFO
Published Date :
Aug. 22, 2026, 4:16 p.m.
Last Modified :
Aug. 22, 2026, 4:16 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Ensure metadata area contains complete fields.
- Snapshot validated flags for transmit path.
- Use snapshot for request and completion processing.
- Address __xsk_buff_get_metadata flag handling.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-74708.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-74708 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-74708
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-74708 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-74708 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 22, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'ca4419f15abd19ba8be1e109661b60f9f5b6c9f0', 'lessThan': 'af511afa1d2977f384044df78d6fbf9fba653f7a', 'versionType': 'git'}, {'status': 'affected', 'version': 'ca4419f15abd19ba8be1e109661b60f9f5b6c9f0', 'lessThan': 'bc63d47611c07b0d5d655fe1a590861931527920', 'versionType': 'git'}, {'status': 'affected', 'version': 'ca4419f15abd19ba8be1e109661b60f9f5b6c9f0', 'lessThan': '439ce2dddf3d22129b9113a7881637256a35e936', 'versionType': 'git'}, {'status': 'affected', 'version': 'd9d736c416c9a85f84e15435ba82a177262e745b', 'versionType': 'git'}, {'status': 'affected', 'version': '6.14.2', 'lessThan': '6.15', 'versionType': 'semver'}], 'programFiles': ['include/net/xdp_sock_drv.h', 'net/xdp/xsk.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.15'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.15', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.45', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.9', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['include/net/xdp_sock_drv.h', 'net/xdp/xsk.c'], 'defaultStatus': 'affected'}] Added 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. Added Reference https://git.kernel.org/stable/c/439ce2dddf3d22129b9113a7881637256a35e936 Added Reference https://git.kernel.org/stable/c/af511afa1d2977f384044df78d6fbf9fba653f7a Added Reference https://git.kernel.org/stable/c/bc63d47611c07b0d5d655fe1a590861931527920