CVE-2026-68401

Summary

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

firmware: arm_ffa: Fix out-of-bound writes in ffa_setup_and_transmit()

Sashiko (locally) reports multiple out-of-bound issues in ffa_setup_and_transmit:

  1. Writing ep_mem_access->reserved can write out of bounds for FFA versions < 1.2 as ffa_emad_size_get() returns 16 bytes in that case while reserved has an offset of 24. Instead of zeroing fields, memset the struct to zero first based on the FFA version.

  2. Make sure there is enough size to write constituents.

While at it, convert the only sizeof() in the driver that uses a type instead of variable.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux111a833dc5cbef3d05b2a796a7e23cb7f6ff2192 < cf5708c9d78c98214c62b1e5d049cd527a543b8eaffected
LinuxLinux111a833dc5cbef3d05b2a796a7e23cb7f6ff2192 < 27abdaf0c5c89b06694e4c3d8318e8d6a60c1d1baffected
LinuxLinux111a833dc5cbef3d05b2a796a7e23cb7f6ff2192 < 3383ffb7ef937317361713ffcc21921a7848511aaffected
LinuxLinux28ebfb74fbf513e0c7cd2674d8c2400ee0220d18affected
LinuxLinux22157f74458106c5900dbd938eb44623c22d97a0affected
LinuxLinuxb77ec23b6df41c48e88735230e11caec56163630affected
LinuxLinux5.15.114 < 5.16affected
LinuxLinux6.1.31 < 6.2affected
LinuxLinux6.3.5 < 6.4affected
LinuxLinux6.4affected
LinuxLinux0 < 6.4unaffected
LinuxLinux6.18.42 <= 6.18.*unaffected
LinuxLinux7.1.6 <= 7.1.*unaffected
LinuxLinux7.2-rc4 <= *unaffected

Weaknesses

References