CVE-2025-21724

NVD 0.07.8▲
EchelonGraph scoreLOW confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2025-02-27.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa
0.0
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No confirmed exploitation signals yet
CISA-KEV: Not listedEPSS: 0%CVSS: —Exploit: NoneExposed: 0

A fix is available — apply it.

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

iommufd/iova_bitmap: Fix shift-out-of-bounds in iova_bitmap_offset_to_index()

Resolve a UBSAN shift-out-of-bounds issue in iova_bitmap_offset_to_index() where shifting the constant "1" (of type int) by bitmap->mapped.pgshift (an unsigned long value) could result in undefined behavior.

The constant "1" defaults to a 32-bit "int", and when "pgshift" exceeds 31 (e.g., pgshift = 63) the shift operation overflows, as the result cannot be represented in a 32-bit type.

To resolve this, the constant is updated to "1UL", promoting it to an unsigned long type to match the operand's type.

CVSS v3
—
EG Score
7.8(low)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity78% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
7.8%
KEV
Not listed

Published

February 27, 2025

Last Modified

July 14, 2026

Advisory Details (7)

Auto-updated May 12, 2026
⚠️ Active exploitation confirmed. Patch available.
generic🔴 Active Exploitation

SSA-082556

https://cert-portal.siemens.com/productcert/html/ssa-082556.html
generic Patch Available

[SECURITY] [DLA 4102-1] linux-6.1 security update

https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
generic

iommufd/iova_bitmap: Fix shift-out-of-bounds in iova_bitmap_offset_to_index() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e24c1551059268b37f6f40639883eafb281b8b9c
generic

iommufd/iova_bitmap: Fix shift-out-of-bounds in iova_bitmap_offset_to_index() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d5d33f01b86af44b23eea61ee309e4ef22c0cdfe
generic

iommufd/iova_bitmap: Fix shift-out-of-bounds in iova_bitmap_offset_to_index() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b1f8453b8ff1ab79a03820ef608256c499769cb6
generic

iommufd/iova_bitmap: Fix shift-out-of-bounds in iova_bitmap_offset_to_index() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/44d9c94b7a3f29a3e07c4753603a35e9b28842a3
generic

iommufd/iova_bitmap: Fix shift-out-of-bounds in iova_bitmap_offset_to_index() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/38ac76fc06bc6826a3e4b12a98efbe98432380a9

Vendor Advisories for CVE-2025-21724(3)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(16)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-aws (6.11.0-1014.15) @ oracular2026-05-21ubuntu
ubuntulinux-tools-realtime-6.8.1 (6.8.1-1025.26) @ noble2026-05-21ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-64.67~22.04.1) @ jammy2026-05-21ubuntu
ubuntulinux-tools-lowlatency-hwe-20.04-edge (6.8.0-64.67.1) @ noble2026-05-21ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1029.30~22.04.1) @ jammy2026-05-21ubuntu
ubuntulinux-tools-gcp-lts-24.04 (6.8.0-1033.35) @ noble2026-05-21ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2026.27) @ noble2026-05-21ubuntu
ubuntulinux-tools-raspi-6.8 (6.8.0-1031.35) @ noble2026-05-21ubuntu
ubuntulinux-virtual-6.8 (6.8.0-64.67) @ noble2026-05-21ubuntu
ubuntulinux-tools-azure-nvidia-lts-24.04 (6.8.0-1022.23) @ noble2026-05-21ubuntu
ubuntulinux-tools-oracle-64k (6.11.0-1016.17) @ oracular2026-05-21ubuntu
ubuntulinux-virtual-hwe-24.04-edge (6.11.0-26.26) @ oracular2026-05-21ubuntu
redhatkernel-0:5.14.0-284.154.1.el9_22026-01-28redhat
redhatkernel-rt-0:5.14.0-284.154.1.rt14.439.el9_22026-01-28redhat
redhatkernel-0:5.14.0-427.107.1.el9_42026-01-21redhat
linuxKernel @ 6.1.129—osv

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.

Additional Vendor Advisories

(12)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 11× in last 7d / 48× 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.

Showing the most recent 100 of 128 total refreshes for this CVE.

  1. 2026-07-23 02:50 UTCEG score recompute
  2. 2026-07-22 14:07 UTCEPSS rescore
  3. 2026-07-22 14:07 UTCEPSS rescore
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  15. 2026-07-14 13:11 UTCMITRE cvelistV5
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  24. 2026-07-10 17:52 UTCOSV refresh
  25. 2026-07-09 19:09 UTCEPSS rescore
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  26. 2026-06-22 02:07 UTCOSV refresh
  27. 2026-06-21 14:56 UTCEPSS rescore
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Frequently asked(4)

What is CVE-2025-21724?
CVE-2025-21724 is a publicly disclosed vulnerability published on February 27, 2025. In the Linux kernel, the following vulnerability has been resolved: iommufd/iovabitmap: Fix shift-out-of-bounds in iovabitmapoffsetto_index() Resolve a UBSAN shift-out-of-bounds issue in iovabitmapoffsettoindex() where shifting the constant "1" (of type int) by bitmap->mapped.pgshift (an unsigned…
When was CVE-2025-21724 disclosed?
CVE-2025-21724 was first published in the National Vulnerability Database on February 27, 2025, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-21724 actively exploited?
CVE-2025-21724 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 7.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2025-21724?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-21724, 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

Explore the affected products and dependency analysis for CVE-2025-21724

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