CVE-2026-64536staging: rtl8723bs: fix OOB reads in is_ap_in_tkip() IE loop

Official description

In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix OOB reads in is_ap_in_tkip() IE loop The loop in is_ap_in_tkip() iterates over IEs without verifying that enough bytes remain before dereferencing the IE header or its payload: - pIE->element_id and pIE->length are read without checking that i + sizeof(*pIE) <= ie_length, so a truncated IE at the end of the buffer causes an OOB read. - For WLAN_EID_VENDOR_SPECIFIC the code compares pIE->data + 12, which requires pIE->length >= 16. For WLAN_EID_RSN it compares pIE->data + 8, requiring pIE->length >= 12. Neither requirement is checked. Add the missing IE header and payload bounds checks and guard each data access with an explicit pIE->length minimum, matching the pattern established in update_beacon_info().

Affected packages & fixed versions

Affected products (as reported)

References

• https://git.kernel.org/stable/c/ea3809f7e20bdff282b8cc1e94937d5fb9fb32c7
• https://git.kernel.org/stable/c/d2055332297e24c63fffda943ef7a5eefc0a6019
• https://git.kernel.org/stable/c/6f26cc55affd9d7f88ae2f5d12db4ecf9072c209
• https://git.kernel.org/stable/c/204b22c8df115370037248859bf0fa62db73a396
• https://git.kernel.org/stable/c/a6105ea8ca6ebbc04beaf3bcbf7dbb5985f5d395
• https://git.kernel.org/stable/c/4380b3860d887a13555ff024a58dfc05b490dfd6
• https://git.kernel.org/stable/c/3bf39f711ff27c64be8680a8938bcc5001982e81