Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update
Affects Red HatSource GCVE Database
Not known to be exploited · CVSS 4.8 Medium.
Data as of 6 Nov 2026, 03:02 UTC
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 13 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| ALSA Projectalsa-lib | Affected
| Fixed in– |
GitHubalsa-libpkg:github/alsa-libOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Red Hat currently does not provide a mitigation that meets their criteria for ease of use, deployment, applicability, or stability. The recommended action is to apply the updated alsa-lib packages provided in the Red Hat Hardened Images RPMs update (version 1.2.16.1-2.1.hum1). Users should follow Red Hat's update instructions at https://images.redhat.com/ to deploy the fixed packages. No other mitigations are currently available.
Description
CVE-2026-90781 is an off-by-one stack buffer overflow vulnerability in the alsa-lib component of Red Hat Hardened Images RPMs. A local attacker can exploit this flaw by providing a specially crafted long control-element identifier string, causing a one-byte overflow past a 64-byte buffer. This leads to adjacent stack memory corruption and results in a denial of service (DoS) by crashing the calling process. No patch or mitigation meeting Red Hat's criteria is currently available.
References
- access.redhat.com/errata/RHSA-2026:67289 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-90781 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- images.redhat.com (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_67289.json (opens in a new tab)