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CVE-2026-74559
xsk: drain continuation descs after overflow in xsk_build_skb()
Overview
Description

In the Linux kernel, the following vulnerability has been resolved: xsk: drain continuation descs after overflow in xsk_build_skb() Fix generic xmit path multi-buffer logic when packets are either too big (count of descriptors exceed MAX_SKB_FRAGS) or an invalid descriptor is included in fragmented packet. Introduce xdp_sock::drain_cont and act upon this flag - when it is set, keep on consuming descriptors from AF_XDP Tx ring and put them directly onto Cq. Previously these descriptors were silently lost and could never be reached again.

Details
INFO

Published Date :

Aug. 15, 2026, 1:18 p.m.

Last Modified :

Aug. 15, 2026, 1:18 p.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Impact
Affected Products

The following products are affected by CVE-2026-74559 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

No affected product recoded yet

: Total Affected Vendor : 0 | Products : 0
Solution
Address packet descriptor overflow and invalid descriptors by draining them to the completion queue.
  • Consume descriptors from Tx ring.
  • Place descriptors onto Cq.
  • Apply relevant kernel patches.
References
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-2026-74559.

URL Resource
https://git.kernel.org/stable/c/5e94d74e4f3baebaa083288f33b4be7ce0a34982
https://git.kernel.org/stable/c/bd44a6dcd4248883de90f5dad53ae80066e27096
https://git.kernel.org/stable/c/ceb00cb87a22c42d20c39336213db2b843ca9e34
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-74559 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-2026-74559 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-2026-74559 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-74559 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.

  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 15, 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': 'cf24f5a5feeaae34c1a34d1e04f8ac697290427a', 'lessThan': 'ceb00cb87a22c42d20c39336213db2b843ca9e34', 'versionType': 'git'}, {'status': 'affected', 'version': 'cf24f5a5feeaae34c1a34d1e04f8ac697290427a', 'lessThan': '5e94d74e4f3baebaa083288f33b4be7ce0a34982', 'versionType': 'git'}, {'status': 'affected', 'version': 'cf24f5a5feeaae34c1a34d1e04f8ac697290427a', 'lessThan': 'bd44a6dcd4248883de90f5dad53ae80066e27096', 'versionType': 'git'}], 'programFiles': ['include/net/xdp_sock.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': '6.6'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.6', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.44', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.8', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc6', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['include/net/xdp_sock.h', 'net/xdp/xsk.c'], 'defaultStatus': 'affected'}]
    Added Description In the Linux kernel, the following vulnerability has been resolved: xsk: drain continuation descs after overflow in xsk_build_skb() Fix generic xmit path multi-buffer logic when packets are either too big (count of descriptors exceed MAX_SKB_FRAGS) or an invalid descriptor is included in fragmented packet. Introduce xdp_sock::drain_cont and act upon this flag - when it is set, keep on consuming descriptors from AF_XDP Tx ring and put them directly onto Cq. Previously these descriptors were silently lost and could never be reached again.
    Added Reference https://git.kernel.org/stable/c/5e94d74e4f3baebaa083288f33b4be7ce0a34982
    Added Reference https://git.kernel.org/stable/c/bd44a6dcd4248883de90f5dad53ae80066e27096
    Added Reference https://git.kernel.org/stable/c/ceb00cb87a22c42d20c39336213db2b843ca9e34
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
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