Medium severity · published Oct 26, 2026
CVE-2026-116741
Speex through 1.2.1 Out-of-Bounds Write via speex_bits_read_whole_bytes
New
6.5
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 35% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SP
speex · xiph
through 1.2.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-116741
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-116741
github.com
https://github.com/xiph/speex
github.com
https://github.com/xiph/speex/blob/Speex-1.2.1/libspeex/bits.c#L177
github.com
https://github.com/xiph/speex/issues/42
gitlab.xiph.org
https://gitlab.xiph.org/xiph/speex/-/merge_requests/32
hackmd.io
https://hackmd.io/@haindpwn/speex-bits-read-whole-bytes-oob-write
www.vulncheck.com
https://www.vulncheck.com/advisories/speex-through-1.2.1-out-of-bounds-write-via-speex-bits-read-whole-bytes
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