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Fencer Vulns
medium 4.3

CVE-2026-16254 json

Claircore: claircore: denial of service via out-of-bounds slice in claircore's apk installed-database parser

published 2026-07-20 3 mo ago modified 2026-07-21 3 mo ago also EUVD-2026-45900

cvss
4.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 31%
public exploits
0
none known

Summary

A flaw was found in claircore's apk package scanner. Malformed package-database data in a container layer can cause an out-of-bounds access that panics the scanner. If that panic is not recovered, the Clair indexer process can crash, leading to a denial of service.

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-2026-16254 updated cvss 4.3

claircore: claircore: Denial of service via out-of-bounds slice in claircore's apk installed-database parser

  • Red Hat Advanced Cluster Security 4 advanced-cluster-security/rhacs-main-rhel8, advanced-cluster-security/rhacs-main-rhel9, advanced-cluster-security/rhacs-roxctl-rhel8, advanced-cluster-security/rhacs-roxctl-rhel9, advanced-cluster-security/rhacs-rhel8-operator, advanced-cluster-security/rhacs-rhel9-operator, +3 more Red Hat Quay 3 quay/clair-rhel8, quay/clair-rhel9
    affected: workaround, no fix available “Limit image push/indexing to trusted sources until a fix is available. Where possible, run indexing so a single scanner failure cannot disrupt shared indexing capacity.”

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
3 mo ago

Exploit prediction

0.37% chance of exploitation in the next 30 days, higher than 31% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Affected products

  • Red Hat Red Hat Advanced Cluster Security 4
  • Red Hat Red Hat Quay 3

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.