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CVE-2026-90781— alsa-lib through 1.2.16.1 Off-by-One Stack Buffer Overflow in __snd_ctl_ascii_elem_id_parse()

Quick assessment

Affected
ALSA Project alsa-lib
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.

alsa-lib 1.2.16.1 及之前版本中存在一个栈缓冲区溢出漏洞，位于 函数中。该函数在解析包含 64 个或更多字符的 字段时，会向一个 64 字节缓冲区之外多写入一个字节。攻击者可以通过保存的状态文件或命令行参数提供一个较长的控制元素标识符字符串，从而覆盖相邻的栈内存，导致调用进程崩溃。

CVSS 4.4 · Medium

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2026-90781

Vulnerability Information
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Vulnerability Title
alsa-lib through 1.2.16.1 Off-by-One Stack Buffer Overflow in __snd_ctl_ascii_elem_id_parse()
Source: CVE Program / CVE List V5
Vulnerability Description
alsa-lib through 1.2.16.1 contains a stack buffer overflow in the __snd_ctl_ascii_elem_id_parse() function that writes one byte past a 64-byte buffer when parsing a name= field with 64 or more characters. Attackers can supply a long control-element identifier string through saved state files or command-line arguments to overwrite adjacent stack memory and crash the calling process.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
Off-by-one错误
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
ALSA Project alsa-lib 0 ~ 1.2.16.1 -

II. Public POCs for CVE-2026-90781

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III. Intelligence Information for CVE-2026-90781

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Patches & Fixes for CVE-2026-90781 (2)

Vendor Advisories for CVE-2026-90781 (1)

Mailing List Discussions for CVE-2026-90781 (1)

Vendor Pages for CVE-2026-90781 (1)

IV. Related Vulnerabilities

Same product: alsa-lib
Same vendor: ALSA Project
Same weakness: CWE-193

V. Comments for CVE-2026-90781

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