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Fencer Vulns
medium 4.4

CVE-2026-90781 json

alsa-lib through 1.2.16.1 Off-by-One Stack Buffer Overflow in __snd_ctl_ascii_elem_id_parse()

published 2026-09-13 56 d ago modified 2026-09-24 45 d ago also EUVD-2026-77008

cvss
4.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 7%
public exploits
0
none known

Summary

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.

Patch / fix

  • alsa-lib Debian 14 1.2.16.1-2

debian advisories DEBIAN-CVE-2026-90781

  • alsa-lib hummingbird 1 1.2.16.1-2.1.hum1
  • alsa-ucm hummingbird 1 1.2.16.1-2.1.hum1
  • alsa-topology hummingbird 1 1.2.16.1-2.1.hum1
  • alsa-lib hummingbird 1 1.2.16.1-2.hum1
  • alsa-ucm hummingbird 1 1.2.16.1-2.hum1
  • alsa-topology hummingbird 1 1.2.16.1-2.hum1

red hat advisories RHSA-2026:67289RHSA-2026:40573

  • alsa openSUSE Tumbleweed 1.2.16.1-2.1

opensuse advisories openSUSE-SU-2026:11783-1

  • alsa-lib Azure Linux 3.0 1.2.16.1-3

azure linux advisories AZL-104928

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-90781 updated cvss 6.1

alsa-lib: alsa-lib: Denial of Service via off-by-one stack buffer overflow

  • Red Hat Enterprise Linux 6 alsa-lib
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 alsa-lib Red Hat Enterprise Linux 8 alsa-lib, alsa-ucm Red Hat Enterprise Linux 9 alsa-lib, alsa-ucm Red Hat Enterprise Linux 10 alsa-lib
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Hardened Images alsa-lib 1.2.16.1-2.hum1, alsa-ucm 1.2.16.1-2.hum1, alsa-lib 1.2.16.1-2.1.hum1, alsa-ucm 1.2.16.1-2.1.hum1, alsa-topology 1.2.16.1-2.hum1, alsa-topology 1.2.16.1-2.1.hum1
    fixed: vendor fix RHSA-2026:67289

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
53 d ago

Exploit prediction

0.18% chance of exploitation in the next 30 days, higher than 7% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 4.8 CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
CNA 3.1 4.4 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
CNA 4.0 4.8 CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

  • ALSA Project alsa-lib

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.