CVE-2026-68400

Summary

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

firmware: arm_ffa: Fix Endpoint Memory Access Descriptor offset calculation

Use the descriptor's ep_mem_offset to calculate the start of the endpoint memory access array and to comply with the FF-A spec instead of defaulting to sizeof(struct ffa_mem_region). This requires moving ffa_mem_region_additional_setup() earlier in the setup flow. Also, add sanity checks to ensure the calculated descriptor offsets do not exceed max_fragsize.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux113580530ee7dc61e668b641d657920734533b9f < b39b08e6bee812514b449dc874076890e6b871a0affected
LinuxLinux113580530ee7dc61e668b641d657920734533b9f < 8ef18f0ab3c0ec1eac77289f5a542bd96a8a6d66affected
LinuxLinux113580530ee7dc61e668b641d657920734533b9f < b4d961351aa84fdf0148783fb1f3a1391b8a0adbaffected
LinuxLinux6.7affected
LinuxLinux0 < 6.7unaffected
LinuxLinux6.18.42 <= 6.18.*unaffected
LinuxLinux7.1.6 <= 7.1.*unaffected
LinuxLinux7.2-rc4 <= *unaffected

Weaknesses

References