CVE-2026-97957

Summary

In the Linux kernel, the following vulnerability has been resolved:

net: hinic: fix mailbox segment buffer overflow

check_mbox_seq_id_and_seg_len() validates that seq_id does not exceed SEQ_ID_MAX_VAL (42) and seg_len does not exceed MBOX_SEG_LEN (48). However, this allows the last segment (seq_id=42) to carry a full 48-byte payload, writing to offset 42*48=2016 for 48 bytes (ending at byte 2064). The receive buffer is only MBOX_MAX_BUF_SZ (2048) bytes, resulting in a 16-byte heap buffer overflow.

The hinic3 driver already handles this correctly by defining MBOX_LAST_SEG_MAX_LEN and rejecting the last segment when it exceeds the remaining buffer space. Apply the same fix to the hinic driver.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxa425b6e1c69ba907b72b737a4d44f8cfbc43ce3c < 7cc974799fde846eda2d8f00ad4f8e1810eb0499affected
LinuxLinuxa425b6e1c69ba907b72b737a4d44f8cfbc43ce3c < 8de1e23bd91fe3a6683e4bc574e2d6bcb0eef920affected
LinuxLinuxa425b6e1c69ba907b72b737a4d44f8cfbc43ce3c < 72be1fd5d256dde748c0905c5e1749a119cad5bdaffected
LinuxLinuxa425b6e1c69ba907b72b737a4d44f8cfbc43ce3c < c622bbc212207d7c6bbd69dd88f0c3a3f5853d16affected
LinuxLinuxa425b6e1c69ba907b72b737a4d44f8cfbc43ce3c < eca54a092d5f7b497b458ff5a6f66d4f7bfb6674affected
LinuxLinuxa425b6e1c69ba907b72b737a4d44f8cfbc43ce3c < 9f6ad383901d0cb1c8ea5f7f3160fabfe1540eb5affected
LinuxLinuxa425b6e1c69ba907b72b737a4d44f8cfbc43ce3c < 513f7b16ed0cffae9348151c72bed17c7073096faffected
LinuxLinuxa425b6e1c69ba907b72b737a4d44f8cfbc43ce3c < 5d4d985957434867bbe85e4fa5e638f3e48ad522affected
LinuxLinux5.8affected
LinuxLinux0 < 5.8unaffected
LinuxLinux5.10.271 <= 5.10.*unaffected
LinuxLinux5.15.222 <= 5.15.*unaffected
LinuxLinux6.1.189 <= 6.1.*unaffected
LinuxLinux6.6.158 <= 6.6.*unaffected
LinuxLinux6.12.111 <= 6.12.*unaffected
LinuxLinux6.18.53 <= 6.18.*unaffected
LinuxLinux7.2.7 <= 7.2.*unaffected
LinuxLinux7.3-rc3 <= *unaffected

Weaknesses

References