Skip to content
Fencer Intel
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 last mo. modified last mo. 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

Is CVE-2026-90781 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

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
last mo.

Exploit prediction

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

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 Intel 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.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.