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CVE-2026-64520— firmware: arm_ffa: Bound PARTITION_INFO_GET_REGS copies

CVSS 8.4 · High EPSS 0.13% · P3

Possible ATT&CK Techniques 1AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 8

VendorProductVersion RangeStatus
LinuxLinuxba85c644ac8dc37d9b01a3332c2f142cb4d46954< f39bc7ebe75e2186b417a024a7f7e2fd4cc7eb95affected
ba85c644ac8dc37d9b01a3332c2f142cb4d46954< 79d95c02ae0a95e6e80e8e92b7ca74ecee02854faffected
ba85c644ac8dc37d9b01a3332c2f142cb4d46954< 3974ea1938406f9bfa7c1f48d4e43533f447bb08affected
6.12affected
< 6.12unaffected
6.18.34≤ 6.18.*unaffected
7.0.11≤ 7.0.*unaffected
7.1≤ *unaffected
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I. Basic Information for CVE-2026-64520

Vulnerability Information
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Vulnerability Title
firmware: arm_ffa: Bound PARTITION_INFO_GET_REGS copies
Source: CVE Program / CVE List V5
Vulnerability Description
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)
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux ba85c644ac8dc37d9b01a3332c2f142cb4d46954 ~ f39bc7ebe75e2186b417a024a7f7e2fd4cc7eb95 -
LinuxLinux 6.12 -

II. Public POCs for CVE-2026-64520

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III. Intelligence Information for CVE-2026-64520

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Patches & Fixes for CVE-2026-64520 (3)

Same Patch Batch · Linux · 2026-07-25 · 274 CVEs total

CVE-2026-643559.8 CRITICALbpf: Reject fragmented frames in devmap
CVE-2026-644109.8 CRITICALnetfilter: flowtable: IPIP tunnel hardware offload is not yet support
CVE-2026-643999.8 CRITICALksmbd: add permission checks for FSCTL_DUPLICATE_EXTENTS_TO_FILE
CVE-2026-643979.8 CRITICALksmbd: serialize QUERY_DIRECTORY requests per file
CVE-2026-643919.8 CRITICALksmbd: use opener credentials for ADS I/O
CVE-2026-643879.8 CRITICALsmb: client: fix query directory replay double-free
CVE-2026-643869.8 CRITICALsmb: client: fix query_info() replay double-free
CVE-2026-643859.8 CRITICALsmb: client: fix double-free in SMB2_ioctl() replay
CVE-2026-643839.8 CRITICALsmb: client: fix double-free in SMB2_flush() replay
CVE-2026-643849.8 CRITICALsmb: client: fix change notify replay double-free
CVE-2026-642689.8 CRITICALRDMA/siw: bound Read Response placement to the RREAD length
CVE-2026-644399.8 CRITICALcrypto: krb5 - filter out async aead implementations at alloc
CVE-2026-643039.8 CRITICALspi: fsl-lpspi: terminate the RX channel on TX prepare failure path
CVE-2026-645239.8 CRITICALnet/handshake: Take a long-lived file reference at submit
CVE-2026-644599.8 CRITICALtcp: restore RCU grace period in tcp_ao_destroy_sock
CVE-2026-642699.1 CRITICALRDMA/rtrs-srv: Bound RDMA-Write length to chunk size in rdma_write_sg
CVE-2026-643939.1 CRITICALksmbd: run set info with opener credentials
CVE-2026-643929.1 CRITICALksmbd: use opener credentials for delete-on-close
CVE-2026-643199.1 CRITICALnvmet-auth: validate reply message payload bounds against transfer length
CVE-2026-644509.1 CRITICALtipc: fix out-of-bounds read in broadcast Gap ACK blocks

Showing top 20 of 274 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-64520

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