Linux kernel arm_ffa PARTITION_INFO_GET_REGS OOB copy
CVE-2026-64520 Published on July 25, 2026
firmware: arm_ffa: Bound PARTITION_INFO_GET_REGS copies
In the Linux kernel, the following vulnerability has been resolved:
firmware: arm_ffa: Bound PARTITION_INFO_GET_REGS copies
The register-based PARTITION_INFO_GET path trusted the firmware-provided
indices when copying partition descriptors into the caller buffer.
Reject inconsistent counts or index progressions so the copy loop cannot
write past the allocated array.
(fixed cur_idx when exactly one descriptor in the first fragment)
Products Associated with CVE-2026-64520
stack.watch emails you whenever new vulnerabilities are published in Linux Kernel or Canonical Ubuntu Linux. Just hit a watch button to start following.
Affected Versions
Linux:- Version ba85c644ac8dc37d9b01a3332c2f142cb4d46954 and below f39bc7ebe75e2186b417a024a7f7e2fd4cc7eb95 is affected.
- Version ba85c644ac8dc37d9b01a3332c2f142cb4d46954 and below 79d95c02ae0a95e6e80e8e92b7ca74ecee02854f is affected.
- Version ba85c644ac8dc37d9b01a3332c2f142cb4d46954 and below 3974ea1938406f9bfa7c1f48d4e43533f447bb08 is affected.
- Version 6.12 is affected.
- Before 6.12 is unaffected.
- Version 6.18.34, <= 6.18.* is unaffected.
- Version 7.0.11, <= 7.0.* is unaffected.
- Version 7.1, <= * is unaffected.