CVE intelligence and bounded remediation

CVE-2023-28576 — The buffer obtained from kernel APIs such as cam_mem_get_cpu_buf() may be readable/writable in userspace after kernel accesses it

High CVSS 7

The buffer obtained from kernel APIs such as cam_mem_get_cpu_buf() may be readable/writable in userspace after kernel accesses it. In other words, user mode may race and modify the packet header (e.g. header.count), causing checks (e.g. size checks) in kernel code to be invalid. This may lead to out-of-bounds read/write issues.

Severity
High
CVSS
7 (3.1)
Published
2023-08-08
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-367

Affected products

  • qualcomm / fastconnect_6800_firmware
  • qualcomm / fastconnect_6900_firmware
  • qualcomm / fastconnect_7800_firmware
  • qualcomm / qca6391_firmware
  • qualcomm / qca6426_firmware
  • qualcomm / qca6436_firmware

Showing 6 representative product identities from 31 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Race condition, TOCTOU, and lifecycle synchronization

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Check exposure

  • Map concurrent actors, shared state, lock boundaries, signals, callbacks, retries, and check-then-use sequences in the affected path.
  • Determine whether untrusted users can influence timing, object names, filesystem state, or repeated state transitions.
  • Identify clustered and multi-process behavior that repository-local tests may not represent.

Remediate safely

  • Make the sensitive state transition atomic or protect it with a consistently ordered synchronization primitive.
  • Perform authorization and invariant checks on the same authoritative object and transaction used for the operation.
  • Use unique private resources, safe ownership transfer, and idempotent operations; add deterministic concurrency regression tests.

Authoritative sources

Complete CVE record and remediation plan

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