CVE-2026-74340
wifi: wcn36xx: fix OOB read from firmware count in PRINT_REG_INFO indication
Description
In the Linux kernel, the following vulnerability has been resolved: wifi: wcn36xx: fix OOB read from firmware count in PRINT_REG_INFO indication The firmware-controlled rsp->count field is used as the loop bound for indexing into the flexible rsp->regs[] array without validation against the message length. A count exceeding the actual data causes out-of- bounds reads from the heap-allocated message buffer. Add a check that count fits within the received message.
INFO
Published Date :
Aug. 15, 2026, 6:22 a.m.
Last Modified :
Aug. 15, 2026, 6:22 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2026-74340
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
Solution
- Validate firmware count against message length.
- Apply the Linux kernel patch.
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-2026-74340.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-74340 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-2026-74340
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-2026-74340 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-74340 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': '43efa3c0f241e04862be8e6a68ff765d36cde1ba', 'lessThan': '22b0b8572a64362531dd0ed499b75e16282aeb2b', 'versionType': 'git'}, {'status': 'affected', 'version': '43efa3c0f241e04862be8e6a68ff765d36cde1ba', 'lessThan': '3cf92b44c4fb88a5e8de8733a4494c0956606bca', 'versionType': 'git'}, {'status': 'affected', 'version': '43efa3c0f241e04862be8e6a68ff765d36cde1ba', 'lessThan': '0907c06dccae9e3c8d5a68eb9014beec73a36e79', 'versionType': 'git'}, {'status': 'affected', 'version': '43efa3c0f241e04862be8e6a68ff765d36cde1ba', 'lessThan': '64228dfc4247aca178c01e5a37af7d8dcc7a6089', 'versionType': 'git'}, {'status': 'affected', 'version': '43efa3c0f241e04862be8e6a68ff765d36cde1ba', 'lessThan': '23d210877968657bd07e1a517e0b516db20a1d80', 'versionType': 'git'}, {'status': 'affected', 'version': '43efa3c0f241e04862be8e6a68ff765d36cde1ba', 'lessThan': 'f03782f7f41f2afee5076a1ef08ced5649218771', 'versionType': 'git'}, {'status': 'affected', 'version': '43efa3c0f241e04862be8e6a68ff765d36cde1ba', 'lessThan': 'f987efff29a5fe45320ea5991c9d5cb98b676953', 'versionType': 'git'}, {'status': 'affected', 'version': '43efa3c0f241e04862be8e6a68ff765d36cde1ba', 'lessThan': 'df2187acfca6c6cca372c5d35f42394d9c270b09', 'versionType': 'git'}], 'programFiles': ['drivers/net/wireless/ath/wcn36xx/smd.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.11'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.11', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'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/wireless/ath/wcn36xx/smd.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: wifi: wcn36xx: fix OOB read from firmware count in PRINT_REG_INFO indication The firmware-controlled rsp->count field is used as the loop bound for indexing into the flexible rsp->regs[] array without validation against the message length. A count exceeding the actual data causes out-of- bounds reads from the heap-allocated message buffer. Add a check that count fits within the received message. Added Reference https://git.kernel.org/stable/c/0907c06dccae9e3c8d5a68eb9014beec73a36e79 Added Reference https://git.kernel.org/stable/c/22b0b8572a64362531dd0ed499b75e16282aeb2b Added Reference https://git.kernel.org/stable/c/23d210877968657bd07e1a517e0b516db20a1d80 Added Reference https://git.kernel.org/stable/c/3cf92b44c4fb88a5e8de8733a4494c0956606bca Added Reference https://git.kernel.org/stable/c/64228dfc4247aca178c01e5a37af7d8dcc7a6089 Added Reference https://git.kernel.org/stable/c/df2187acfca6c6cca372c5d35f42394d9c270b09 Added Reference https://git.kernel.org/stable/c/f03782f7f41f2afee5076a1ef08ced5649218771 Added Reference https://git.kernel.org/stable/c/f987efff29a5fe45320ea5991c9d5cb98b676953