CVE-2026-74707
xsk: validate metadata when processing requests
Description
In the Linux kernel, the following vulnerability has been resolved: xsk: validate metadata when processing requests The zero-copy path validates TX metadata while obtaining the descriptor context, then reads it again later when preparing the hardware request. User space can change the metadata between those operations and bypass the original validation. Validate the metadata in xsk_tx_metadata_request() and use the resulting flags snapshot for every feature check. Read request fields once so all zero-copy drivers process only values observed after successful validation.
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
- Validate metadata when obtaining descriptor context.
- Use a snapshot of flags for feature checks.
- Read request fields only once after validation.
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-2026-74707.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-74707 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-2026-74707
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-2026-74707 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-74707 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': '5fd121971912dee2f5af1efec64462ac722deb17', 'versionType': 'git'}, {'status': 'affected', 'version': 'ca4419f15abd19ba8be1e109661b60f9f5b6c9f0', 'lessThan': '0cc7aa6e0d19027fdd42e6fbd156267ac1e3bbba', 'versionType': 'git'}, {'status': 'affected', 'version': 'ca4419f15abd19ba8be1e109661b60f9f5b6c9f0', 'lessThan': '849b1664dbda1cf6c63e0fd4f9dec23782b8c851', 'versionType': 'git'}, {'status': 'affected', 'version': 'd9d736c416c9a85f84e15435ba82a177262e745b', 'versionType': 'git'}, {'status': 'affected', 'version': '6.14.2', 'lessThan': '6.15', 'versionType': 'semver'}], 'programFiles': ['drivers/net/ethernet/intel/igc/igc_main.c', 'drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c', 'drivers/net/ethernet/stmicro/stmmac/stmmac_main.c', 'include/net/libeth/xsk.h', 'include/net/xdp_sock_drv.h', 'net/xdp/xsk_buff_pool.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': ['drivers/net/ethernet/intel/igc/igc_main.c', 'drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c', 'drivers/net/ethernet/stmicro/stmmac/stmmac_main.c', 'include/net/libeth/xsk.h', 'include/net/xdp_sock_drv.h', 'net/xdp/xsk_buff_pool.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: xsk: validate metadata when processing requests The zero-copy path validates TX metadata while obtaining the descriptor context, then reads it again later when preparing the hardware request. User space can change the metadata between those operations and bypass the original validation. Validate the metadata in xsk_tx_metadata_request() and use the resulting flags snapshot for every feature check. Read request fields once so all zero-copy drivers process only values observed after successful validation. Added Reference https://git.kernel.org/stable/c/0cc7aa6e0d19027fdd42e6fbd156267ac1e3bbba Added Reference https://git.kernel.org/stable/c/5fd121971912dee2f5af1efec64462ac722deb17 Added Reference https://git.kernel.org/stable/c/849b1664dbda1cf6c63e0fd4f9dec23782b8c851