CVE-2025-21913

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2025-04-01. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

A fix is available — apply it.

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

x86/amd_nb: Use rdmsr_safe() in amd_get_mmconfig_range()

Xen doesn't offer MSR_FAM10H_MMIO_CONF_BASE to all guests. This results in the following warning:

unchecked MSR access error: RDMSR from 0xc0010058 at rIP: 0xffffffff8101d19f (xen_do_read_msr+0x7f/0xa0) Call Trace: xen_read_msr+0x1e/0x30 amd_get_mmconfig_range+0x2b/0x80 quirk_amd_mmconfig_area+0x28/0x100 pnp_fixup_device+0x39/0x50 __pnp_add_device+0xf/0x150 pnp_add_device+0x3d/0x100 pnpacpi_add_device_handler+0x1f9/0x280 acpi_ns_get_device_callback+0x104/0x1c0 acpi_ns_walk_namespace+0x1d0/0x260 acpi_get_devices+0x8a/0xb0 pnpacpi_init+0x50/0x80 do_one_initcall+0x46/0x2e0 kernel_init_freeable+0x1da/0x2f0 kernel_init+0x16/0x1b0 ret_from_fork+0x30/0x50 ret_from_fork_asm+0x1b/0x30

based on quirks for a "PNP0c01" device. Treating MMCFG as disabled is the right course of action, so no change is needed there.

This was most likely exposed by fixing the Xen MSR accessors to not be silently-safe.

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity55% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
9%
KEV
Not listed

Published

April 1, 2025

Last Modified

July 14, 2026

Advisory Details (7)

Auto-updated Jul 17, 2026
Patch available.
generic

SSA-019113

https://cert-portal.siemens.com/productcert/html/ssa-019113.html
generic Patch Available

[SECURITY] [DLA 4193-1] linux-6.1 security update

https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
generic

x86/amd_nb: Use rdmsr_safe() in amd_get_mmconfig_range() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ebf6a763904e42dabeb2e270ceb0bbe0f825d7ae
generic

x86/amd_nb: Use rdmsr_safe() in amd_get_mmconfig_range() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/923fede9eae9865af305bcdf8f111e4b62ae4bda
generic

x86/amd_nb: Use rdmsr_safe() in amd_get_mmconfig_range() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8f43ba5ee498fe037d1570f6868d9aeaf49dda80
generic

x86/amd_nb: Use rdmsr_safe() in amd_get_mmconfig_range() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/14cb5d83068ecf15d2da6f7d0e9ea9edbcbc0457
generic

x86/amd_nb: Use rdmsr_safe() in amd_get_mmconfig_range() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0c65d13bdcc54e5b924ebe790f85a7f01bfe1cb1

Vendor Advisories for CVE-2025-21913(1)

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

Patch Availability(19)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-84.84~22.04.1) @ jammy2026-05-30ubuntu
ubuntulinux-tools-oem-24.04b (6.11.0-1024.24) @ noble2026-05-30ubuntu
ubuntulinux-tools-gcp-edge (6.8.0-1040.42~22.04.1) @ jammy2026-05-30ubuntu
ubuntulinux-tools-lowlatency-64k (6.11.0-1015.16) @ oracular2026-05-30ubuntu
ubuntulinux-tools-azure-edge (6.11.0-1018.18~24.04.1) @ noble2026-05-30ubuntu
ubuntulinux-tools-realtime-6.8.1 (6.8.1-1034.35) @ noble2026-05-30ubuntu
ubuntulinux-tools-ibm-edge (6.8.0-1037.37~22.04.1) @ jammy2026-05-30ubuntu
ubuntulinux-tools-realtime-hwe-22.04 (6.8.1-1034.35~22.04.1) @ jammy2026-05-30ubuntu
ubuntulinux-tools-lowlatency-hwe-22.04-edge (6.8.0-84.84.1~22.04.1) @ jammy2026-05-30ubuntu
ubuntulinux-virtual-hwe-24.04-edge (6.11.0-28.28) @ oracular2026-05-30ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1039.42.1) @ noble2026-05-30ubuntu
ubuntulinux-tools-raspi-6.8 (6.8.0-1039.43) @ noble2026-05-30ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2031.32) @ noble2026-05-30ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-85.85~22.04.1) @ jammy2026-05-30ubuntu
ubuntulinux-tools-oracle-lts-24.04 (6.8.0-1037.38) @ noble2026-05-30ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1038.44) @ noble2026-05-30ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1037.38~22.04.1) @ jammy2026-05-30ubuntu
ubuntulinux-tools-azure-nvidia-lts-24.04 (6.8.0-1025.27) @ noble2026-05-30ubuntu
linuxKernel @ 6.1.131—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.

All Vendor Advisories

(18)

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 7× in last 7d / 41× 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 111 total refreshes for this CVE.

  1. 2026-08-07 16:26 UTCEPSS rescore
  2. 2026-08-06 13:46 UTCEPSS rescore
  3. 2026-08-05 19:16 UTCEPSS rescore
  4. 2026-08-04 15:09 UTCEPSS rescore
  5. 2026-08-04 10:37 UTCEPSS rescore
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  7. 2026-08-02 02:25 UTCEPSS rescore
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  9. 2026-07-30 16:27 UTCEPSS rescore
  10. 2026-07-30 01:29 UTCEPSS rescore
  11. 2026-07-28 15:35 UTCEPSS rescore
  12. 2026-07-27 14:12 UTCEPSS rescore
  13. 2026-07-26 14:53 UTCEPSS rescore
  14. 2026-07-24 14:17 UTCEPSS rescore
  15. 2026-07-24 10:41 UTCOSV refresh
  16. 2026-07-23 14:17 UTCEPSS rescore
  17. 2026-07-23 02:50 UTCEG score recompute
  18. 2026-07-22 14:07 UTCEPSS rescore
  19. 2026-07-22 14:07 UTCEPSS rescore
  20. 2026-07-21 15:24 UTCEPSS rescore
  21. 2026-07-20 17:07 UTCEPSS rescore
  22. 2026-07-19 14:30 UTCEPSS rescore
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  24. 2026-07-19 02:28 UTCEPSS rescore
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  1. 2026-07-18 10:03 UTCEPSS rescore
  2. 2026-07-16 17:02 UTCEPSS rescore
  3. 2026-07-15 16:57 UTCEPSS rescore
  4. 2026-07-15 16:57 UTCEPSS rescore
  5. 2026-07-15 01:59 UTCEPSS rescore
  6. 2026-07-14 13:19 UTCNVD updateCVSS v3 → 5.5 · severity → MEDIUM
  7. 2026-07-14 13:11 UTCMITRE cvelistV5
  8. 2026-07-13 22:29 UTCEPSS rescore
  9. 2026-07-13 22:29 UTCEPSS rescore
  10. 2026-07-13 06:12 UTCEPSS rescore
  11. 2026-07-13 06:12 UTCEPSS rescore
  12. 2026-07-12 05:46 UTCEPSS rescore
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  14. 2026-07-11 08:27 UTCEPSS rescore
  15. 2026-07-11 08:26 UTCEPSS rescore
  16. 2026-07-09 19:09 UTCEPSS rescore
  17. 2026-07-08 15:14 UTCEPSS rescore
  18. 2026-07-07 13:45 UTCEPSS rescore
  19. 2026-07-07 05:51 UTCOSV refresh
  20. 2026-07-06 16:26 UTCEPSS rescore
  21. 2026-07-06 02:22 UTCEPSS rescore
  22. 2026-07-06 02:22 UTCEPSS rescore
  23. 2026-07-05 02:30 UTCEPSS rescore
  24. 2026-07-04 06:30 UTCEPSS rescore
  25. 2026-07-01 15:06 UTCEPSS rescore
  26. 2026-06-30 23:21 UTCEPSS rescore
  27. 2026-06-30 23:21 UTCEPSS rescore
  28. 2026-06-29 14:06 UTCEPSS rescore
  29. 2026-06-28 14:07 UTCEPSS rescore
  30. 2026-06-28 14:07 UTCEPSS rescore
  31. 2026-06-28 04:55 UTCEPSS rescore
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  35. 2026-06-25 13:49 UTCEPSS rescore
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  37. 2026-06-24 14:04 UTCEPSS rescore
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  39. 2026-06-23 21:32 UTCEPSS rescore
  40. 2026-06-23 21:32 UTCEPSS rescore
  41. 2026-06-22 14:25 UTCEPSS rescore
  42. 2026-06-22 14:25 UTCEPSS rescore
  43. 2026-06-21 14:56 UTCEPSS rescore
  44. 2026-06-21 14:56 UTCEPSS rescore
  45. 2026-06-21 01:59 UTCEPSS rescore
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  47. 2026-06-19 19:25 UTCEPSS rescore
  48. 2026-06-19 19:25 UTCEPSS rescore
  49. 2026-06-18 17:52 UTCEPSS rescore
  50. 2026-06-18 17:52 UTCEPSS rescore
  51. 2026-06-18 17:05 UTCOSV refresh
  52. 2026-06-17 17:52 UTCEPSS rescore
  53. 2026-06-16 17:52 UTCEPSS rescore
  54. 2026-06-16 17:52 UTCEPSS rescore
  55. 2026-06-15 17:48 UTCEPSS rescore
  56. 2026-06-14 23:17 UTCEPSS rescore
  57. 2026-06-13 22:59 UTCEPSS rescore
  58. 2026-06-12 23:11 UTCEPSS rescore
  59. 2026-06-11 13:59 UTCEPSS rescore
  60. 2026-06-10 22:18 UTCEPSS rescore
  61. 2026-06-10 13:22 UTCEPSS rescore
  62. 2026-06-08 14:16 UTCEPSS rescore
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  64. 2026-06-07 15:24 UTCEPSS rescore
  65. 2026-06-07 15:24 UTCEPSS rescore
  66. 2026-06-06 13:47 UTCEPSS rescore
  67. 2026-06-06 13:47 UTCEPSS rescore
  68. 2026-06-05 22:46 UTCEPSS rescore
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  70. 2026-06-05 06:10 UTCEPSS rescore
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  72. 2026-06-04 13:11 UTCEPSS rescore
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  74. 2026-06-02 20:12 UTCEPSS rescore
  75. 2026-06-02 20:12 UTCEPSS rescore

Frequently asked(5)

What is CVE-2025-21913?
CVE-2025-21913 is a medium vulnerability published on April 1, 2025. In the Linux kernel, the following vulnerability has been resolved: x86/amdnb: Use rdmsrsafe() in amdgetmmconfig_range() Xen doesn't offer MSRFAM10HMMIOCONFBASE to all guests. This results in the following warning: unchecked MSR access error: RDMSR from 0xc0010058 at rIP: 0xffffffff8101d19f…
When was CVE-2025-21913 disclosed?
CVE-2025-21913 was first published in the National Vulnerability Database on April 1, 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-2025-21913 actively exploited?
CVE-2025-21913 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 90.6% of all scored CVEs.
What is the CVSS score of CVE-2025-21913?
CVE-2025-21913 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2025-21913?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-21913, 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.

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