CVE-2026-64443
staging: rtl8723bs: fix OOB read in update_beacon_info() IE loop
Description
In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix OOB read in update_beacon_info() IE loop The IE parsing loop in update_beacon_info() advances by (pIE->length + 2) each iteration but only guards on i < len. When a malicious AP sends a Beacon whose last IE has only one byte remaining in the frame (the element_id byte lands at len-1), the loop reads pIE->length from one byte past the allocated receive buffer. Additionally, even when the header bytes are in bounds, pIE->length itself can extend the data window beyond len, passing a truncated IE to the handler functions. Add two guards at the top of the loop body: 1. Break if fewer than sizeof(*pIE) bytes remain (can't read header). 2. Break if the IE's declared data extends past len. Also replace i += (pIE->length + 2) with i += sizeof(*pIE) + pIE->length for consistency with the sizeof(*pIE) guards added above.
INFO
Published Date :
July 25, 2026, 10:17 a.m.
Last Modified :
July 25, 2026, 10:17 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2026-64443
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
- Add checks for remaining bytes before reading IE header.
- Ensure IE data does not extend beyond buffer length.
- Update loop increment for consistent boundary checks.
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-2026-64443.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-64443 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-2026-64443
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-2026-64443 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-64443 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
Jul. 25, 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': '554c0a3abf216c991c5ebddcdb2c08689ecd290b', 'lessThan': '5e8db4cff5b45c7c4edc8ae3f302027c3bb32b25', 'versionType': 'git'}, {'status': 'affected', 'version': '554c0a3abf216c991c5ebddcdb2c08689ecd290b', 'lessThan': '6dd5e8c3011ebabf417257d7f07901a7c4311539', 'versionType': 'git'}, {'status': 'affected', 'version': '554c0a3abf216c991c5ebddcdb2c08689ecd290b', 'lessThan': '9193c34f75fd9e1ea8a590d7cced464c3380dc29', 'versionType': 'git'}, {'status': 'affected', 'version': '554c0a3abf216c991c5ebddcdb2c08689ecd290b', 'lessThan': 'bd953d52d587d42365e399b96c52dbdb13032070', 'versionType': 'git'}, {'status': 'affected', 'version': '554c0a3abf216c991c5ebddcdb2c08689ecd290b', 'lessThan': '69f174a0673b6b7a29b851adb60bc450cdc0ecc4', 'versionType': 'git'}, {'status': 'affected', 'version': '554c0a3abf216c991c5ebddcdb2c08689ecd290b', 'lessThan': 'b5cc2f999927f69723ca53f1f2a3aa37dbeda907', 'versionType': 'git'}, {'status': 'affected', 'version': '554c0a3abf216c991c5ebddcdb2c08689ecd290b', 'lessThan': 'ed51de4a86e173c3b0ef78e039c2e49e08b11f16', 'versionType': 'git'}], 'programFiles': ['drivers/staging/rtl8723bs/core/rtw_wlan_util.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.12'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.12', 'versionType': 'semver'}, {'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': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc3', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/staging/rtl8723bs/core/rtw_wlan_util.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix OOB read in update_beacon_info() IE loop The IE parsing loop in update_beacon_info() advances by (pIE->length + 2) each iteration but only guards on i < len. When a malicious AP sends a Beacon whose last IE has only one byte remaining in the frame (the element_id byte lands at len-1), the loop reads pIE->length from one byte past the allocated receive buffer. Additionally, even when the header bytes are in bounds, pIE->length itself can extend the data window beyond len, passing a truncated IE to the handler functions. Add two guards at the top of the loop body: 1. Break if fewer than sizeof(*pIE) bytes remain (can't read header). 2. Break if the IE's declared data extends past len. Also replace i += (pIE->length + 2) with i += sizeof(*pIE) + pIE->length for consistency with the sizeof(*pIE) guards added above. Added Reference https://git.kernel.org/stable/c/5e8db4cff5b45c7c4edc8ae3f302027c3bb32b25 Added Reference https://git.kernel.org/stable/c/69f174a0673b6b7a29b851adb60bc450cdc0ecc4 Added Reference https://git.kernel.org/stable/c/6dd5e8c3011ebabf417257d7f07901a7c4311539 Added Reference https://git.kernel.org/stable/c/9193c34f75fd9e1ea8a590d7cced464c3380dc29 Added Reference https://git.kernel.org/stable/c/b5cc2f999927f69723ca53f1f2a3aa37dbeda907 Added Reference https://git.kernel.org/stable/c/bd953d52d587d42365e399b96c52dbdb13032070 Added Reference https://git.kernel.org/stable/c/ed51de4a86e173c3b0ef78e039c2e49e08b11f16