CVE-2026-68401firmware: arm_ffa: Fix out-of-bound writes in ffa_setup_and_transmit()
- 7.8HighCVSS base score
- 0.14%Exploitation in 30 daysEPSS · top 97% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Linux
- 11 days later
· 11 days later
Published
- 3 months later
· 3 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.14% · top 97% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 22157f74458106c5900dbd938eb44623c22d97a0 – < 500f92f398c717aa515afd23c7a38c0e7f4a1dc9
- affected 111a833dc5cbef3d05b2a796a7e23cb7f6ff2192 – < d312a71b19bb83803c8d1372bc042bd36db657f7
- affected 111a833dc5cbef3d05b2a796a7e23cb7f6ff2192 – < 00bef9d0f9e787f56ff4699d3b577983ff8b7f24
- affected 111a833dc5cbef3d05b2a796a7e23cb7f6ff2192 – < cf5708c9d78c98214c62b1e5d049cd527a543b8e
- affected 111a833dc5cbef3d05b2a796a7e23cb7f6ff2192 – < 27abdaf0c5c89b06694e4c3d8318e8d6a60c1d1b
- affected 111a833dc5cbef3d05b2a796a7e23cb7f6ff2192 – < 3383ffb7ef937317361713ffcc21921a7848511a
- affected 28ebfb74fbf513e0c7cd2674d8c2400ee0220d18
- affected b77ec23b6df41c48e88735230e11caec56163630
- affected 6.1.31 – < 6.1.191
- affected 5.15.114 – < 5.16
- affected 6.3.5 – < 6.4
- affected 6.4
- unaffected < 6.4
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.160 – ≤ 6.6.*
- unaffected 6.12.114 – ≤ 6.12.*
- unaffected 6.18.42 – ≤ 6.18.*
- unaffected 7.1.6 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References6
- https://git.kernel.org/stable/c/500f92f398c717aa515afd23c7a38c0e7f4a1dc9 (opens in a new tab)
- https://git.kernel.org/stable/c/d312a71b19bb83803c8d1372bc042bd36db657f7 (opens in a new tab)
- https://git.kernel.org/stable/c/00bef9d0f9e787f56ff4699d3b577983ff8b7f24 (opens in a new tab)
- https://git.kernel.org/stable/c/cf5708c9d78c98214c62b1e5d049cd527a543b8e (opens in a new tab)
- https://git.kernel.org/stable/c/27abdaf0c5c89b06694e4c3d8318e8d6a60c1d1b (opens in a new tab)
- https://git.kernel.org/stable/c/3383ffb7ef937317361713ffcc21921a7848511a (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-55587 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-68401)Record last updated .