CVE-2026-68401
HighIn 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.
CVSS 3.1 score
7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected versions
Linux kernel versions
5.15.114,
6.1.31,
6.3.5,
6.4
and later are affected. Fixed in
6.18.42,
7.1.6,
7.2
and their respective stable series.
References
3 totalFrequently asked questions
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What is CVE-2026-68401?
CVE-2026-68401 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . It affects Linux kernel versions from 5.15.114 onward and has been patched in 6.18.42, 7.1.6 and 7.2. CVE-2026-68401 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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What is the CVSS score for CVE-2026-68401?
CVE-2026-68401 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. -
Is there a patch available for CVE-2026-68401?
Yes. CVE-2026-68401 has been patched. Fixed versions include 6.18.42, 7.1.6 and 7.2. If you are running Linux kernel 5.15.114 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-68401 actively exploited?
No. CVE-2026-68401 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.