CVE-2026-116741— Speex through 1.2.1 Out-of-Bounds Write via speex_bits_read_whole_bytes

Quick assessment

Affected

xiph speex

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Speex（libspeex）1.2.1 及更早版本中存在一个越界写入漏洞。该漏洞位于文件中的函数，其问题在于对非所有者 SpeexBits 缓冲区进行了错误的长度截断处理。攻击者可以向通过或初始化的缓冲区注入特制的 Speex 数据，从而破坏堆或栈内存，导致应用程序崩溃。

CVSS 6.5 · Medium Updated Oct 27, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

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Vulnerability Information

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Vulnerability Title

Speex through 1.2.1 Out-of-Bounds Write via speex_bits_read_whole_bytes

Source: CVE Program / CVE List V5

Vulnerability 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.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

Source: CVE Program / CVE List V5

Vulnerability Type

跨界内存写

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
xiph	speex	0 ~ 1.2.1	-

II. Public POCs for CVE-2026-116741

#	POC Description	Source Link	Shenlong Link

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No public POC found.

III. Intelligence Information for CVE-2026-116741

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Other References for CVE-2026-116741 (6)

https://hackmd.io/@haindpwn/speex-bits-read-whole-bytes-oob-write third-party-advisory
https://gitlab.xiph.org/xiph/speex/-/merge_requests/32 patch
https://github.com/xiph/speex/blob/Speex-1.2.1/libspeex/bits.c#L177 technical-description
https://github.com/xiph/speex product
https://github.com/xiph/speex/issues/42 issue-tracking
https://www.vulncheck.com/advisories/speex-through-1.2.1-out-of-bounds-write-via-speex-bits-read-whole-bytes third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-116741

IV. Related Vulnerabilities

Same weakness: CWE-787