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NVD / CVE Program· CNA Linux

CVE-2025-22047: x86/microcode/AMD: Fix __apply_microcode_amd()'s return value

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.21% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 31ab12df723543047c3fc19cb8f8c4498ec6267f, 6.12.23, 6.13.11.
  • Severity is disputed: the assigning authority (CNA) scores it 7.8, NVD 5.5.

Low priority for now. Upgrade to Linux Linux 31ab12df723543047c3fc19cb8f8c4498ec6267f, 6.12.23, 6.13.11 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: x86/microcode/AMD: Fix __apply_microcode_amd()'s return value When verify_sha256_digest() fails, __apply_microcode_amd() should propagate the failure by returning false (and not -1 which is promoted to true).

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Apr 16, 2025
Updated
Aug 5, 2026
EPSS
0.2% · 11th percentile
CWE
—

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CNA vs NVD score

NVD
5.5
CNA · Linux
7.8
2.3 point gap

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel6.6.81 and later · before 6.6.87
  • linux linux kernel6.12.18 and later · before 6.12.23
  • linux linux kernel6.13.6 and later · before 6.13.11
  • linux linux kernel6.14
  • linux linux kernel6.14.1

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 6.14affected
    • bef830144febedb7de86863ae99d8f53bed76e95 and later · before 763f4d638f71cb45235395790a46e9f9e84227fdaffected · git
    • 3e8653e399e7111a3e87d534ff4533b250ae574f and later · before ada88219d5315fc13f2910fe278c7112d8d68889affected · git
    • c162ba4f45ab6ef3b7114af6fb419f1833f050c0 and later · before d295c58fad1d5ab987a81f139dd21498732c4f13affected · git
    • 50cef76d5cb0e199cda19f026842560f6eedc4f7 and later · before 7f705a45f130a85fbf31c2abdc999c65644c8307affected · git
    • 50cef76d5cb0e199cda19f026842560f6eedc4f7 and later · before 31ab12df723543047c3fc19cb8f8c4498ec6267faffected · git
    • 6.6.81 and later · before 6.6.87affected · semver
    • 6.12.18 and later · before 6.12.23affected · semver
    • 6.13.6 and later · before 6.13.11affected · semver
    • before 6.14not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:13linuxbefore 6.12.25-16.12.25-1
openSUSE:Leap 15.6dtb-aarch64before 6.4.0-150600.23.87.16.4.0-150600.23.87.1
openSUSE:Leap 15.6kernel-64kbbefore 6.4.0-150600.23.87.16.4.0-150600.23.87.1
openSUSE:Leap 15.6kernel-debugbefore 6.4.0-150600.23.87.16.4.0-150600.23.87.1
openSUSE:Leap 15.6kernel-defaultbefore 6.4.0-150600.23.87.16.4.0-150600.23.87.1
openSUSE:Leap 15.6kernel-default-basebefore 6.4.0-150600.23.87.1.150600.12.40.16.4.0-150600.23.87.1.150600.12.40.1
openSUSE:Leap 15.6kernel-docsbefore 6.4.0-150600.23.87.16.4.0-150600.23.87.1
openSUSE:Leap 15.6kernel-kvmsmallbefore 6.4.0-150600.23.87.16.4.0-150600.23.87.1
openSUSE:Leap 15.6kernel-obs-buildbefore 6.4.0-150600.23.87.16.4.0-150600.23.87.1
openSUSE:Leap 15.6kernel-obs-qabefore 6.4.0-150600.23.87.16.4.0-150600.23.87.1
openSUSE:Leap 15.6kernel-sourcebefore 6.4.0-150600.23.87.16.4.0-150600.23.87.1
openSUSE:Leap 15.6kernel-symsbefore 6.4.0-150600.23.87.16.4.0-150600.23.87.1
openSUSE:Leap 15.6kernel-zfcpdumpbefore 6.4.0-150600.23.87.16.4.0-150600.23.87.1
SUSE:Linux Enterprise Live Patching 15 SP6kernel-defaultbefore 6.4.0-150600.23.87.16.4.0-150600.23.87.1
SUSE:Linux Enterprise Live Patching 15 SP6kernel-livepatch-SLE15-SP6_Update_20before 1-150600.13.3.11-150600.13.3.1
SUSE:Linux Enterprise Live Patching 15 SP7kernel-livepatch-SLE15-SP7_Update_9before 1-150700.15.3.11-150700.15.3.1
SUSE:Linux Enterprise Live Patching 15 SP7kernel-livepatch-SLE15-SP7-RT_Update_9before 1-150700.1.3.21-150700.1.3.2
SUSE:Linux Enterprise Module for Basesystem 15 SP7kernel-64kbbefore 6.4.0-150700.53.31.16.4.0-150700.53.31.1
SUSE:Linux Enterprise Module for Basesystem 15 SP7kernel-defaultbefore 6.4.0-150700.53.31.16.4.0-150700.53.31.1
SUSE:Linux Enterprise Module for Basesystem 15 SP7kernel-default-basebefore 6.4.0-150700.53.31.1.150700.17.21.16.4.0-150700.53.31.1.150700.17.21.1
SUSE:Linux Enterprise Module for Basesystem 15 SP7kernel-sourcebefore 6.4.0-150700.53.31.16.4.0-150700.53.31.1
SUSE:Linux Enterprise Module for Basesystem 15 SP7kernel-zfcpdumpbefore 6.4.0-150700.53.31.16.4.0-150700.53.31.1
SUSE:Linux Enterprise Module for Development Tools 15 SP7kernel-docsbefore 6.4.0-150700.53.31.16.4.0-150700.53.31.1
SUSE:Linux Enterprise Module for Development Tools 15 SP7kernel-obs-buildbefore 6.4.0-150700.53.31.16.4.0-150700.53.31.1

+14

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2025-22043Apr 16, 2025 · ksmbd: add bounds check for durable handle context
    22Monitor
  • ← EarlierCVE-2025-22046Apr 16, 2025 · uprobes/x86: Harden uretprobe syscall trampoline check
    22Monitor
  • Later →CVE-2025-22049Apr 16, 2025 · LoongArch: Increase ARCH_DMA_MINALIGN up to 16
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux31ab12df723543047c3fc19cb8f8c4498ec6267fVendor (CNA)
Linux Linux6.12.23Vendor (CNA)
Linux Linux6.13.11Vendor (CNA)
Linux Linux6.6.87Vendor (CNA)
Linux Linux763f4d638f71cb45235395790a46e9f9e84227fdVendor (CNA)
Linux Linux7f705a45f130a85fbf31c2abdc999c65644c8307Vendor (CNA)
Linux Linuxada88219d5315fc13f2910fe278c7112d8d68889Vendor (CNA)
Linux Linuxd295c58fad1d5ab987a81f139dd21498732c4f13Vendor (CNA)
debian:linux6.12.25-1 · Debian:13Package registry (OSV)
opensuse:dtb-aarch646.4.0-150600.23.87.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-64kb6.4.0-150600.23.87.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-debug6.4.0-150600.23.87.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-default6.4.0-150600.23.87.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-default-base6.4.0-150600.23.87.1.150600.12.40.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-docs6.4.0-150600.23.87.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-kvmsmall6.4.0-150600.23.87.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-obs-build6.4.0-150600.23.87.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-obs-qa6.4.0-150600.23.87.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-source6.4.0-150600.23.87.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-syms6.4.0-150600.23.87.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-zfcpdump6.4.0-150600.23.87.1 · openSUSE:Leap 15.6Package registry (OSV)
suse:kernel-64kb6.4.0-150600.23.87.1 · SUSE:Linux Enterprise Server 15 SP6-LTSSPackage registry (OSV)
suse:kernel-64kb6.4.0-150700.53.31.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP7Package registry (OSV)
suse:kernel-azure6.4.0-150700.20.27.1 · SUSE:Linux Enterprise Module for Public Cloud 15 SP7Package registry (OSV)
suse:kernel-default6.4.0-150600.23.87.1 · SUSE:Linux Enterprise Live Patching 15 SP6Package registry (OSV)
suse:kernel-default6.4.0-150700.53.31.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP7Package registry (OSV)
suse:kernel-default-base6.4.0-150600.23.87.1.150600.12.40.1 · SUSE:Linux Enterprise Server 15 SP6-LTSSPackage registry (OSV)
suse:kernel-default-base6.4.0-150700.53.31.1.150700.17.21.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP7Package registry (OSV)
suse:kernel-docs6.4.0-150600.23.87.1 · SUSE:Linux Enterprise Server 15 SP6-LTSSPackage registry (OSV)
suse:kernel-docs6.4.0-150700.53.31.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP7Package registry (OSV)

+11

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (4 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records