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CVE-2026-64445

staging: rtl8723bs: fix WEP length underflow and OOB read in OnAuth()

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.96, and 2 more
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: total

Summary

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().

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: total

  3. Record last updated

Affected versions

  • Linux Linux

    From 554c0a3abf216c991c5ebddcdb2c08689ecd290b · fixed in 665e1ecb68b4e8419604e70a33f02d1c8b0222c6; From 554c0a3abf216c991c5ebddcdb2c08689ecd290b · fixed in 87cccc2a767f17dcab71e3b9fe5ae29b5516c5ce; From 554c0a3abf216c991c5ebddcdb2c08689ecd290b · fixed in c9000c93078e5c0a5a651b077c0ec92a4bc7d580; From 554c0a3abf216c991c5ebddcdb2c08689ecd290b · fixed in 1f6c9d255bdda41216b6e34c96aa2b1abee0bb84; From 554c0a3abf216c991c5ebddcdb2c08689ecd290b · fixed in 3e44a7665f3abd320a80d9c64ee4a93317041b8b; From 554c0a3abf216c991c5ebddcdb2c08689ecd290b · fixed in 64ec4192d9c10e96922245d4a6747304cc76b19d; From 554c0a3abf216c991c5ebddcdb2c08689ecd290b · fixed in d90b9f39f375c9826ef145605dfe97765d0ecb91; From 554c0a3abf216c991c5ebddcdb2c08689ecd290b · fixed in a1fc19d61f661d47204f095b593de507884849f7

  • Linux Linux

    4.12

  • KernelLinux

    From 4.12.0 · fixed in 5.10.261; From 5.11.0 · fixed in 5.15.212; From 5.16.0 · fixed in 6.1.178; From 6.2.0 · fixed in 6.6.145; From 6.7.0 · fixed in 6.12.96; From 6.13.0 · fixed in 6.18.39; From 6.19.0 · fixed in 7.1.4

References 8

git.kernel.org