CVE-2025-21966

HIGHNVD 7.87.8—

7.8

In the Linux kernel, the following vulnerability has been resolved:

dm-flakey: Fix memory corruption in optional corrupt_bio_byte feature

Fix memory corruption due to incorrect parameter being passed to bio_init

CVSS v3: 7.8
EG Score: 7.8(medium)
EPSS: 6.8%
KEV: Not listed

Published

April 1, 2025

Last Modified

October 1, 2025

References (4)

416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/57e9417f69839cb10f7ffca684c38acd28ceb57b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5a87e46da2418c57b445371f5ca0958d5779ba5f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/818330f756f3800c37d738bd36bce60eac949938
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/da070843e153471be4297a12fdaa64023276f40e

Patch Availability(20)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	linux-virtual-hwe-24.04-edge (6.11.0-28.28) @ oracular	2026-05-30	ubuntu
ubuntu	linux-tools-azure-edge (6.11.0-1018.18~24.04.1) @ noble	2026-05-30	ubuntu
ubuntu	linux-virtual-6.8 (6.8.0-84.84) @ noble	2026-05-30	ubuntu
ubuntu	linux-tools-oem-24.04b (6.11.0-1024.24) @ noble	2026-05-30	ubuntu
ubuntu	linux-tools-lowlatency-64k (6.11.0-1015.16) @ oracular	2026-05-30	ubuntu
ubuntu	linux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1039.42.1) @ noble	2026-05-30	ubuntu
ubuntu	linux-tools-gcp-edge (6.8.0-1040.42~22.04.1) @ jammy	2026-05-30	ubuntu
ubuntu	linux-tools-realtime-6.8.1 (6.8.1-1034.35) @ noble	2026-05-30	ubuntu
ubuntu	linux-tools-ibm-lts-24.04 (6.8.0-1037.37) @ noble	2026-05-30	ubuntu
ubuntu	linux-tools-oracle-lts-24.04 (6.8.0-1037.38) @ noble	2026-05-30	ubuntu
ubuntu	linux-tools-azure-nvidia-lts-24.04 (6.8.0-1025.27) @ noble	2026-05-30	ubuntu
ubuntu	linux-tools-oracle-edge (6.8.0-1037.38~22.04.1) @ jammy	2026-05-30	ubuntu
ubuntu	linux-tools-raspi-realtime-6.8 (6.8.0-2031.32) @ noble	2026-05-30	ubuntu
ubuntu	linux-tools-raspi-6.8 (6.8.0-1039.43) @ noble	2026-05-30	ubuntu
ubuntu	linux-tools-realtime-hwe-22.04 (6.8.1-1034.35~22.04.1) @ jammy	2026-05-30	ubuntu
ubuntu	linux-virtual-hwe-22.04-edge (6.8.0-85.85~22.04.1) @ jammy	2026-05-30	ubuntu
ubuntu	linux-virtual-hwe-22.04-edge (6.8.0-84.84~22.04.1) @ jammy	2026-05-30	ubuntu
ubuntu	linux-tools-azure-lts-24.04 (6.8.0-1038.44) @ noble	2026-05-30	ubuntu
redhat	kernel-0:5.14.0-570.17.1.el9_6	2025-05-19	redhat
redhat	kernel-0:6.12.0-55.12.1.el10_0	2025-05-19	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-787Out-of-bounds Write

All Vendor Advisories

(21)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 14× in last 7d / 46× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

2026-06-23 21:32 UTCEPSS rescore
2026-06-23 21:32 UTCEPSS rescore
2026-06-22 14:25 UTCEPSS rescore
2026-06-22 14:25 UTCEPSS rescore
2026-06-21 14:56 UTCEPSS rescore
2026-06-21 14:56 UTCEPSS rescore
2026-06-21 01:59 UTCEPSS rescore
2026-06-21 01:59 UTCEPSS rescore
2026-06-19 19:25 UTCEPSS rescore
2026-06-19 19:25 UTCEPSS rescore
2026-06-18 17:52 UTCEPSS rescore
2026-06-18 17:52 UTCEPSS rescore
2026-06-18 17:05 UTCOSV refresh
2026-06-17 17:52 UTCEPSS rescore
2026-06-16 17:52 UTCEPSS rescore
2026-06-16 17:52 UTCEPSS rescore
2026-06-15 17:48 UTCEPSS rescore
2026-06-14 23:17 UTCEPSS rescore
2026-06-13 22:59 UTCEPSS rescore
2026-06-12 23:11 UTCEPSS rescore
2026-06-11 13:59 UTCEPSS rescore
2026-06-10 22:18 UTCEPSS rescore
2026-06-10 13:22 UTCEPSS rescore
2026-06-08 14:16 UTCEPSS rescore
2026-06-08 14:16 UTCEPSS rescore

Show 21 more

2026-06-07 15:24 UTCEPSS rescore
2026-06-07 15:24 UTCEPSS rescore
2026-06-06 13:47 UTCEPSS rescore
2026-06-06 13:47 UTCEPSS rescore
2026-06-05 22:46 UTCEPSS rescore
2026-06-05 22:46 UTCEPSS rescore
2026-06-05 06:10 UTCEPSS rescore
2026-06-05 06:10 UTCEPSS rescore
2026-06-02 20:12 UTCEPSS rescore
2026-06-02 20:12 UTCEPSS rescore
2026-06-01 13:51 UTCEPSS rescore
2026-06-01 13:51 UTCEPSS rescore
2026-05-31 22:30 UTCEPSS rescore
2026-05-31 22:30 UTCEPSS rescore
2026-05-31 00:16 UTCEPSS rescore
2026-05-31 00:16 UTCEPSS rescore
2026-05-30 08:22 UTCEG score recompute
2026-05-30 08:22 UTCVendor advisory
2026-05-30 08:22 UTCGHSA enrichment
2026-05-30 07:59 UTCOSV refresh
2026-05-29 13:44 UTCEPSS rescore

Frequently asked(5)

What is CVE-2025-21966?

CVE-2025-21966 is a high vulnerability published on April 1, 2025. In the Linux kernel, the following vulnerability has been resolved: dm-flakey: Fix memory corruption in optional corruptbiobyte feature Fix memory corruption due to incorrect parameter being passed to bio_init

When was CVE-2025-21966 disclosed?

CVE-2025-21966 was first published in the National Vulnerability Database on April 1, 2025, with the most recent update on October 1, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2025-21966 actively exploited?

CVE-2025-21966 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 6.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2025-21966?

CVE-2025-21966 has a CVSS v3 base score of 7.8 (NVD).

How do I remediate CVE-2025-21966?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-21966, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2025-21966

Published

Last Modified

References (4)

Patch Availability(20)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2025-21966?

Same vendor

Same CWE

CVE-2025-21966

📅 Published

🔄 Last Modified

🔗 References (4)

Patch Availability(20)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2025-21966?

🔗 Related CVEs(same vendor + same CWE)

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References (4)

Frequently asked(5)

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