CVE-2026-74263
net: wwan: t7xx: check skb_clone in control TX
Description
In the Linux kernel, the following vulnerability has been resolved: net: wwan: t7xx: check skb_clone in control TX t7xx_port_ctrl_tx() clones each skb fragment before passing it to the port transmit path. The clone is used immediately to set cloned->len, so an skb_clone() failure results in a NULL pointer dereference. Check the clone before using it. If previous fragments were already queued, preserve the driver's existing partial-write behavior by returning the number of bytes submitted so far.
INFO
Published Date :
Aug. 15, 2026, 6:22 a.m.
Last Modified :
Aug. 17, 2026, 6:19 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Check skb_clone result before use.
- Return bytes submitted if clone fails.
- Apply kernel patch for t7xx driver.
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-2026-74263.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-74263 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-2026-74263
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-2026-74263 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-74263 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.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '36bd28c1cb0dbf48645cfe43159907fb3253b33a', 'lessThan': '7edd4db82f9429591de10be4c904c817f12ba029', 'versionType': 'git'}, {'status': 'affected', 'version': '36bd28c1cb0dbf48645cfe43159907fb3253b33a', 'lessThan': '112490467586146d323cb7230b1d72137e36900c', 'versionType': 'git'}, {'status': 'affected', 'version': '36bd28c1cb0dbf48645cfe43159907fb3253b33a', 'lessThan': 'f7aebaee2961bfcb86f282202d3dbd9b69db1a7c', 'versionType': 'git'}, {'status': 'affected', 'version': '36bd28c1cb0dbf48645cfe43159907fb3253b33a', 'lessThan': '4c1b25d85f4c9a0f85f3f8c39988ad266a3f3095', 'versionType': 'git'}, {'status': 'affected', 'version': '36bd28c1cb0dbf48645cfe43159907fb3253b33a', 'lessThan': '05f789fa90d95d5771230e78453cedff2486039d', 'versionType': 'git'}], 'programFiles': ['drivers/net/wwan/t7xx/t7xx_port_wwan.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.4'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.4', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/net/wwan/t7xx/t7xx_port_wwan.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '36bd28c1cb0dbf48645cfe43159907fb3253b33a', 'lessThan': '7edd4db82f9429591de10be4c904c817f12ba029', 'versionType': 'git'}, {'status': 'affected', 'version': '36bd28c1cb0dbf48645cfe43159907fb3253b33a', 'lessThan': '112490467586146d323cb7230b1d72137e36900c', 'versionType': 'git'}, {'status': 'affected', 'version': '36bd28c1cb0dbf48645cfe43159907fb3253b33a', 'lessThan': 'f7aebaee2961bfcb86f282202d3dbd9b69db1a7c', 'versionType': 'git'}, {'status': 'affected', 'version': '36bd28c1cb0dbf48645cfe43159907fb3253b33a', 'lessThan': '4c1b25d85f4c9a0f85f3f8c39988ad266a3f3095', 'versionType': 'git'}, {'status': 'affected', 'version': '36bd28c1cb0dbf48645cfe43159907fb3253b33a', 'lessThan': '05f789fa90d95d5771230e78453cedff2486039d', 'versionType': 'git'}], 'programFiles': ['drivers/net/wwan/t7xx/t7xx_port_wwan.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.4'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.4', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/net/wwan/t7xx/t7xx_port_wwan.c'], 'defaultStatus': 'affected'}] -
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': '36bd28c1cb0dbf48645cfe43159907fb3253b33a', 'lessThan': '7edd4db82f9429591de10be4c904c817f12ba029', 'versionType': 'git'}, {'status': 'affected', 'version': '36bd28c1cb0dbf48645cfe43159907fb3253b33a', 'lessThan': '112490467586146d323cb7230b1d72137e36900c', 'versionType': 'git'}, {'status': 'affected', 'version': '36bd28c1cb0dbf48645cfe43159907fb3253b33a', 'lessThan': 'f7aebaee2961bfcb86f282202d3dbd9b69db1a7c', 'versionType': 'git'}, {'status': 'affected', 'version': '36bd28c1cb0dbf48645cfe43159907fb3253b33a', 'lessThan': '4c1b25d85f4c9a0f85f3f8c39988ad266a3f3095', 'versionType': 'git'}, {'status': 'affected', 'version': '36bd28c1cb0dbf48645cfe43159907fb3253b33a', 'lessThan': '05f789fa90d95d5771230e78453cedff2486039d', 'versionType': 'git'}], 'programFiles': ['drivers/net/wwan/t7xx/t7xx_port_wwan.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.4'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.4', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/net/wwan/t7xx/t7xx_port_wwan.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: net: wwan: t7xx: check skb_clone in control TX t7xx_port_ctrl_tx() clones each skb fragment before passing it to the port transmit path. The clone is used immediately to set cloned->len, so an skb_clone() failure results in a NULL pointer dereference. Check the clone before using it. If previous fragments were already queued, preserve the driver's existing partial-write behavior by returning the number of bytes submitted so far. Added Reference https://git.kernel.org/stable/c/05f789fa90d95d5771230e78453cedff2486039d Added Reference https://git.kernel.org/stable/c/112490467586146d323cb7230b1d72137e36900c Added Reference https://git.kernel.org/stable/c/4c1b25d85f4c9a0f85f3f8c39988ad266a3f3095 Added Reference https://git.kernel.org/stable/c/7edd4db82f9429591de10be4c904c817f12ba029 Added Reference https://git.kernel.org/stable/c/f7aebaee2961bfcb86f282202d3dbd9b69db1a7c