Vulnerability in xiph speex

[ Why it matters ]Priority signals

• Public proof-of-concept exploit exists (CISA SSVC)

[ Description ]Official description

Speex (libspeex) through 1.2.1 contains an out-of-bounds write vulnerability in speex_bits_read_whole_bytes() in libspeex/bits.c that mishandles length truncation for non-owned SpeexBits buffers. Attackers can stream crafted Speex data into buffers set up with speex_bits_init_buffer() or speex_bits_set_bit_buffer() to corrupt heap or stack memory and crash applications.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• github.com/xiph/speex
• github.com/xiph/speex/blob/Speex-1.2.1/libspeex/bits.c
• github.com/xiph/speex/issues/42
• gitlab.xiph.org/xiph/speex/-/merge_requests/32
• hackmd.io/@haindpwn/speex-bits-read-whole-bytes-oob-write
• www.vulncheck.com/advisories/speex-through-1.2.1-out-of-bounds-write-via-speex-bits-rea…
• hackmd.io/@haindpwn/cve-2026-116741-speex-bits-read-whole-bytes-oob-write