[UPDATE] [high] Red Hat Enterprise Linux (openCryptoki, hplip, 389-ds-base): Multiple Vulnerabilities

highCVE-2026-40253 CVE-2026-8631 CVE-2026-8632 CVE-2026-9064

An attacker can exploit multiple vulnerabilities in Red Hat Enterprise Linux to conduct a denial of service attack, disclose confidential information, gain elevated permissions, or execute arbitrary code.

CSIRTS triage

vendor: Red Hat product: Red Hat Enterprise Linux Remote code execution Information disclosure Privilege escalation Denial of service

What: Multiple vulnerabilities can be exploited to conduct denial of service, disclose confidential information, gain elevated permissions, or execute arbitrary code.
Who is affected: Deployments of Red Hat Enterprise Linux are affected by these vulnerabilities.
Urgency: Remediation is urgent due to the high severity of the vulnerabilities, although they are not currently exploited.
Action: Update to the latest version of Red Hat Enterprise Linux to address these vulnerabilities.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity: high
Published: 2026-08-18
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1957

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-402530.16% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 6% of all EPSS-scored CVEs.
Moderate exploitation riskCVE-2026-86311.8% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 77% of all EPSS-scored CVEs.
Moderate exploitation riskCVE-2026-86324.1% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 90% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-90640.81% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 54% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-40253	coverage & exploitation status	NVD · CVE.org
CVE-2026-8631	coverage & exploitation status	NVD · CVE.org
CVE-2026-8632	coverage & exploitation status	NVD · CVE.org
CVE-2026-9064	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

unknownDSA-6402-1 hplip - security updatedebian