CVE-2026-64445
staging: rtl8723bs: fix WEP length underflow and OOB read in OnAuth()
Description
In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix WEP length underflow and OOB read in OnAuth() OnAuth() has two bugs in the shared-key authentication path. When the Privacy bit is set, rtw_wep_decrypt() is called without verifying that the frame is long enough to contain a valid WEP IV and ICV. Inside rtw_wep_decrypt(), length is computed as: length = len - WLAN_HDR_A3_LEN - iv_len and then passed as (length - 4) to crc32_le(). If len is less than WLAN_HDR_A3_LEN + iv_len + icv_len (32 bytes), length - 4 is negative and, after the implicit cast to size_t, causes crc32_le() to read far beyond the frame buffer. Add a minimum length check before accessing the IV field and calling the decryption path. When processing a seq=3 response, rtw_get_ie() stores the Challenge Text IE length in ie_len, but the subsequent memcmp() always reads 128 bytes regardless of ie_len. IEEE 802.11 mandates a challenge text of exactly 128 bytes; reject any IE whose length field differs, matching the check already applied to OnAuthClient().
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-2026-64445
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
- Update the Linux kernel to the latest security release.
- Verify WEP IV length before decryption.
- Enforce exact challenge text length of 128 bytes.
- Apply vendor-specific patches if available.
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-2026-64445.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-64445 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-2026-64445
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-2026-64445 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-64445 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': '665e1ecb68b4e8419604e70a33f02d1c8b0222c6', 'versionType': 'git'}, {'status': 'affected', 'version': '554c0a3abf216c991c5ebddcdb2c08689ecd290b', 'lessThan': '87cccc2a767f17dcab71e3b9fe5ae29b5516c5ce', 'versionType': 'git'}, {'status': 'affected', 'version': '554c0a3abf216c991c5ebddcdb2c08689ecd290b', 'lessThan': 'c9000c93078e5c0a5a651b077c0ec92a4bc7d580', 'versionType': 'git'}, {'status': 'affected', 'version': '554c0a3abf216c991c5ebddcdb2c08689ecd290b', 'lessThan': '1f6c9d255bdda41216b6e34c96aa2b1abee0bb84', 'versionType': 'git'}, {'status': 'affected', 'version': '554c0a3abf216c991c5ebddcdb2c08689ecd290b', 'lessThan': '3e44a7665f3abd320a80d9c64ee4a93317041b8b', 'versionType': 'git'}, {'status': 'affected', 'version': '554c0a3abf216c991c5ebddcdb2c08689ecd290b', 'lessThan': '64ec4192d9c10e96922245d4a6747304cc76b19d', 'versionType': 'git'}, {'status': 'affected', 'version': '554c0a3abf216c991c5ebddcdb2c08689ecd290b', 'lessThan': 'd90b9f39f375c9826ef145605dfe97765d0ecb91', 'versionType': 'git'}, {'status': 'affected', 'version': '554c0a3abf216c991c5ebddcdb2c08689ecd290b', 'lessThan': 'a1fc19d61f661d47204f095b593de507884849f7', 'versionType': 'git'}], 'programFiles': ['drivers/staging/rtl8723bs/core/rtw_mlme_ext.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': '5.10.261', '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': '6.12.96', '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_mlme_ext.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix WEP length underflow and OOB read in OnAuth() OnAuth() has two bugs in the shared-key authentication path. When the Privacy bit is set, rtw_wep_decrypt() is called without verifying that the frame is long enough to contain a valid WEP IV and ICV. Inside rtw_wep_decrypt(), length is computed as: length = len - WLAN_HDR_A3_LEN - iv_len and then passed as (length - 4) to crc32_le(). If len is less than WLAN_HDR_A3_LEN + iv_len + icv_len (32 bytes), length - 4 is negative and, after the implicit cast to size_t, causes crc32_le() to read far beyond the frame buffer. Add a minimum length check before accessing the IV field and calling the decryption path. When processing a seq=3 response, rtw_get_ie() stores the Challenge Text IE length in ie_len, but the subsequent memcmp() always reads 128 bytes regardless of ie_len. IEEE 802.11 mandates a challenge text of exactly 128 bytes; reject any IE whose length field differs, matching the check already applied to OnAuthClient(). Added Reference https://git.kernel.org/stable/c/1f6c9d255bdda41216b6e34c96aa2b1abee0bb84 Added Reference https://git.kernel.org/stable/c/3e44a7665f3abd320a80d9c64ee4a93317041b8b Added Reference https://git.kernel.org/stable/c/64ec4192d9c10e96922245d4a6747304cc76b19d Added Reference https://git.kernel.org/stable/c/665e1ecb68b4e8419604e70a33f02d1c8b0222c6 Added Reference https://git.kernel.org/stable/c/87cccc2a767f17dcab71e3b9fe5ae29b5516c5ce Added Reference https://git.kernel.org/stable/c/a1fc19d61f661d47204f095b593de507884849f7 Added Reference https://git.kernel.org/stable/c/c9000c93078e5c0a5a651b077c0ec92a4bc7d580 Added Reference https://git.kernel.org/stable/c/d90b9f39f375c9826ef145605dfe97765d0ecb91