CVE-2026-68401 is a vulnerability in Linux Kernel
Published on August 10, 2026
firmware: arm_ffa: Fix out-of-bound writes in ffa_setup_and_transmit()
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.
Products Associated with CVE-2026-68401
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Affected Versions
Linux:- Version 111a833dc5cbef3d05b2a796a7e23cb7f6ff2192 and below cf5708c9d78c98214c62b1e5d049cd527a543b8e is affected.
- Version 111a833dc5cbef3d05b2a796a7e23cb7f6ff2192 and below 27abdaf0c5c89b06694e4c3d8318e8d6a60c1d1b is affected.
- Version 111a833dc5cbef3d05b2a796a7e23cb7f6ff2192 and below 3383ffb7ef937317361713ffcc21921a7848511a is affected.
- Version 28ebfb74fbf513e0c7cd2674d8c2400ee0220d18 is affected.
- Version 22157f74458106c5900dbd938eb44623c22d97a0 is affected.
- Version b77ec23b6df41c48e88735230e11caec56163630 is affected.
- Version 5.15.114 and below 5.16 is affected.
- Version 6.1.31 and below 6.2 is affected.
- Version 6.3.5 and below 6.4 is affected.
- Version 6.4 is affected.
- Before 6.4 is unaffected.
- Version 6.18.42, <= 6.18.* is unaffected.
- Version 7.1.6, <= 7.1.* is unaffected.
- Version 7.2-rc4, <= * is unaffected.