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High severity7.8NVD Advisory· Published Jun 27, 2026· Updated Jul 1, 2026

CVE-2026-45258

CVE-2026-45258

Description

dsp_mmap_single() validated the requested mapping by checking the sum of the user-supplied offset and length against the buffer size. This addition could overflow, so that a large offset and length wrapped around and passed the check. The offset was then narrowed from 64 to 32 bits when converted to a buffer address, yielding a mapping that extended past the audio buffer into unrelated kernel memory.

The /dev/dsp device nodes are world-accessible by default. On a system with an audio device, either issue allows an unprivileged local user to read and write kernel memory, which can be used to escalate privileges, potentially gaining full control of the affected system. At a minimum, an attacker can crash the kernel, resulting in a Denial of Service (DoS).

Affected products

32
  • FreeBSD/FreeBSD31 versions
    cpe:2.3:o:freebsd:freebsd:14.3:-:*:*:*:*:*:*+ 30 more
    • cpe:2.3:o:freebsd:freebsd:14.3:-:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:14.3:p10:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:14.3:p11:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:14.3:p12:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:14.3:p13:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:14.3:p14:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:14.3:p1:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:14.3:p2:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:14.3:p3:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:14.3:p4:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:14.3:p5:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:14.3:p6:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:14.3:p7:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:14.3:p8:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:14.3:p9:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:14.4:-:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:14.4:p1:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:14.4:p2:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:14.4:p3:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:14.4:p4:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:14.4:p5:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:15.0:-:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:15.0:p1:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:15.0:p2:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:15.0:p3:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:15.0:p4:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:15.0:p5:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:15.0:p6:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:15.0:p7:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:15.0:p8:*:*:*:*:*:*
    • cpe:2.3:o:freebsd:freebsd:15.0:p9:*:*:*:*:*:*
  • FreeBSD/soundllm-create

Patches

Vulnerability mechanics

References

1

News mentions

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