Debian Linux Kernel Multiple Vulnerabilities

unknownCVE-2021-47188 CVE-2021-47211 CVE-2022-48703 CVE-2022-49135 CVE-2022-49158 CVE-2022-49183

CSIRTS triage

vendor: Debian product: Linux KernelOther

What: Multiple vulnerabilities exist in the Debian Linux Kernel.
Who is affected: Deployments of Debian Linux Kernel.
Urgency: Remediation urgency is unclear due to lack of specific details.
Action: Monitor for updates from Debian.

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

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Details

Source: HKCERT Security Bulletins (HK · national-cert · site)
Severity: unknown
Published: 2026-07-06
Exploitation: Not in CISA KEV at last sync

Original advisory: https://www.hkcert.org/security-bulletin/debian-linux-kernel-multiple-vulnerabilities_20260706

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-2021-471880.24% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 15% of all EPSS-scored CVEs.
Low exploitation riskCVE-2021-472110.24% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 15% of all EPSS-scored CVEs.
Low exploitation riskCVE-2022-487030.23% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 14% of all EPSS-scored CVEs.
Low exploitation riskCVE-2022-491350.26% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 18% of all EPSS-scored CVEs.
Low exploitation riskCVE-2022-491580.27% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 19% of all EPSS-scored CVEs.
Low exploitation riskCVE-2022-491830.27% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 19% of all EPSS-scored CVEs.
Low exploitation riskCVE-2022-498220.19% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 9% of all EPSS-scored CVEs.
Low exploitation riskCVE-2022-500730.17% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 6% of all EPSS-scored CVEs.
Low exploitation riskCVE-2022-504720.34% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 27% of all EPSS-scored CVEs.
Low exploitation riskCVE-2022-504930.22% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 12% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2021-47188	coverage & exploitation status	NVD · CVE.org
CVE-2021-47211	coverage & exploitation status	NVD · CVE.org
CVE-2022-48703	coverage & exploitation status	NVD · CVE.org
CVE-2022-49135	coverage & exploitation status	NVD · CVE.org
CVE-2022-49158	coverage & exploitation status	NVD · CVE.org
CVE-2022-49183	coverage & exploitation status	NVD · CVE.org
CVE-2022-49822	coverage & exploitation status	NVD · CVE.org
CVE-2022-50073	coverage & exploitation status	NVD · CVE.org
CVE-2022-50472	coverage & exploitation status	NVD · CVE.org
CVE-2022-50493	coverage & exploitation status	NVD · CVE.org
CVE-2022-50552	coverage & exploitation status	NVD · CVE.org
CVE-2023-53133	coverage & exploitation status	NVD · CVE.org
CVE-2023-53292	coverage & exploitation status	NVD · CVE.org
CVE-2023-53421	coverage & exploitation status	NVD · CVE.org
CVE-2023-53596	coverage & exploitation status	NVD · CVE.org
CVE-2023-53989	coverage & exploitation status	NVD · CVE.org
CVE-2023-54125	coverage & exploitation status	NVD · CVE.org
CVE-2023-54129	coverage & exploitation status	NVD · CVE.org
CVE-2023-54271	coverage & exploitation status	NVD · CVE.org
CVE-2023-54322	coverage & exploitation status	NVD · CVE.org
CVE-2024-27012	coverage & exploitation status	NVD · CVE.org
CVE-2024-36922	coverage & exploitation status	NVD · CVE.org
CVE-2024-43902	coverage & exploitation status	NVD · CVE.org
CVE-2024-53221	coverage & exploitation status	NVD · CVE.org
CVE-2024-56657	coverage & exploitation status	NVD · CVE.org
CVE-2025-10263	coverage & exploitation status	NVD · CVE.org
CVE-2025-21739	coverage & exploitation status	NVD · CVE.org
CVE-2025-21863	coverage & exploitation status	NVD · CVE.org
CVE-2025-22026	coverage & exploitation status	NVD · CVE.org
CVE-2025-22105	coverage & exploitation status	NVD · CVE.org
CVE-2025-22107	coverage & exploitation status	NVD · CVE.org
CVE-2025-23131	coverage & exploitation status	NVD · CVE.org
CVE-2025-37864	coverage & exploitation status	NVD · CVE.org
CVE-2025-38129	coverage & exploitation status	NVD · CVE.org
CVE-2025-38250	coverage & exploitation status	NVD · CVE.org
CVE-2025-38584	coverage & exploitation status	NVD · CVE.org
CVE-2025-38627	coverage & exploitation status	NVD · CVE.org
CVE-2025-38710	coverage & exploitation status	NVD · CVE.org
CVE-2025-39929	coverage & exploitation status	NVD · CVE.org
CVE-2025-39997	coverage & exploitation status	NVD · CVE.org
CVE-2025-40164	coverage & exploitation status	NVD · CVE.org
CVE-2025-40347	coverage & exploitation status	NVD · CVE.org
CVE-2025-68201	coverage & exploitation status	NVD · CVE.org
CVE-2025-68315	coverage & exploitation status	NVD · CVE.org
CVE-2025-68340	coverage & exploitation status	NVD · CVE.org
CVE-2025-68823	coverage & exploitation status	NVD · CVE.org
CVE-2026-23066	coverage & exploitation status	NVD · CVE.org
CVE-2026-23099	coverage & exploitation status	NVD · CVE.org

+12 more CVEs referenced in this advisory.

Same CVEs, other sources

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

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Recent advisories for Debian Linux Kernel

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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