CVE-2025-68255
HighCVSS 8.8Exploitation Probability (EPSS)
Low risk27th percentile - higher than 27% of all known CVEs
Summary
In the staging rtl8723bs driver in the Linux kernel, a stack buffer overflow was found during Association Request frame parsing. The Supported Rates IE length from the frame was used directly as the memcpy() length when copying into a fixed-size 16-byte stack buffer, allowing a malicious station to cause a stack overflow by advertising an IE length larger than 16 bytes.
Risk Assessment
An attacker within Wi-Fi range can send a crafted Association Request frame, causing a kernel stack overflow, potentially leading to system crash or code execution.
Recommendation
It is recommended to update the Linux kernel to a version containing the fix that clamps the copied data length to the buffer size.
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- CVE-2026-80533Unknown
In the Linux kernel XFS filesystem, during AGI repair, the function xrep_iunlink_walk_ondisk_bucket may attempt to use the pointer sc->sa.agi_bp, which can be null if the buffer verifier fails. The fix uses ragi->agi_bp instead, which skips verifier checks, to avoid walking off the end of memory.
Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix stack buffer overflow in OnAssocReq IE parsing The Supported Rates IE length from an incoming Association Request frame was used directly as the memcpy() length when copying into a fixed-size 16-byte stack buffer (supportRate). A malicious station can advertise an IE length larger than 16 bytes, causing a stack buffer overflow. Clamp ie_len to the buffer size before copying the Supported Rates IE, and correct the bounds check when merging Extended Supported Rates to prevent a second potential overflow. This prevents kernel stack corruption triggered by malformed association requests.