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NVD / CVE Program· CNA Linux

CVE-2025-38565: perf/core: Exit early on perf_mmap() fail

Noroxi assessment

Priority: Monitor (action score 31/100)

  • 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: 0.19% (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 07091aade394f690e7b655578140ef84d0e8d7b0, 163b0d1a209fe0df5476c1df2330ca12b55abf92, 27d44145bd576bbef9bf6165bcd78128ec3e6cbd; azl3 kernel 6.6.96.2-2 on Azure Linux 3.0 6.6.104.2-1; cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.0 5.15.200.1-1.

Low priority for now. Upgrade to Linux Linux 07091aade394f690e7b655578140ef84d0e8d7b0, 163b0d1a209fe0df5476c1df2330ca12b55abf92, 27d44145bd576bbef9bf6165bcd78128ec3e6cbd; azl3 kernel 6.6.96.2-2 on Azure Linux 3.0 6.6.104.2-1; cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.0 5.15.200.1-1 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: perf/core: Exit early on perf_mmap() fail When perf_mmap() fails to allocate a buffer, it still invokes the event_mapped() callback of the related event. On X86 this might increase the perf_rdpmc_allowed reference counter. But nothing undoes this as perf_mmap_close() is never called in this case, which causes another reference count leak. Return early on failure to prevent that.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Aug 19, 2025
Updated
Jun 17, 2026
EPSS
0.1% · 8th percentile
CWE
—

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

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.

Follow CVE-2025-38565

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
debiandebian linux

Affected versions

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

  • debian debian linux11.0
  • linux linux kernel5.5 and later · before 5.10.241
  • linux linux kernel5.11 and later · before 5.15.190
  • linux linux kernel5.16 and later · before 6.1.148
  • linux linux kernel4.0 and later · before 5.4.297
  • linux linux kernel6.7 and later · before 6.12.42
  • linux linux kernel6.13 and later · before 6.15.10
  • linux linux kernel6.16 and later · before 6.16.1
  • linux linux kernel6.2 and later · before 6.6.102

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

    • 4.0affected
    • 1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb and later · before 5ffda7f3ed76ec8defc19d985e33b3b82ba07839affected · git
    • 1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb and later · before 9b90a48c7de828a15c7a4fc565d46999c6e22d6baffected · git
    • 1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb and later · before de85e72598d89880a02170a1cbc27b35a7d978a9affected · git
    • 1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb and later · before 27d44145bd576bbef9bf6165bcd78128ec3e6cbdaffected · git
    • 1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb and later · before f41e9eba77bf97626e04296dc5677d02816d2432affected · git
    • 1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb and later · before 92043120a2e992800580855498ab8507e1b22db9affected · git
    • 1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb and later · before 163b0d1a209fe0df5476c1df2330ca12b55abf92affected · git
    • 1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb and later · before 7ff8521f30c4c2fcd4e88bd7640486602bf8a650affected · git
    • 1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb and later · before 07091aade394f690e7b655578140ef84d0e8d7b0affected · git

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.148-16.1.148-1
Debian:13linuxbefore 6.12.43-16.12.43-1
Debian:14linuxbefore 6.16.3-16.16.3-1
SUSE:Linux Enterprise Micro 5.2kernel-defaultbefore 5.3.18-150300.59.235.15.3.18-150300.59.235.1
SUSE:Linux Enterprise Micro 5.2kernel-default-basebefore 5.3.18-150300.59.235.1.150300.18.140.15.3.18-150300.59.235.1.150300.18.140.1
SUSE:Linux Enterprise Micro 5.2kernel-rtbefore 5.3.18-150300.235.15.3.18-150300.235.1
SUSE:Linux Enterprise Micro 5.2kernel-source-rtbefore 5.3.18-150300.235.15.3.18-150300.235.1

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-2025-38563Aug 19, 2025 · perf/core: Prevent VMA split of buffer mappings
    31Monitor
  • ← EarlierCVE-2025-38564Aug 19, 2025 · perf/core: Handle buffer mapping fail correctly in perf_mmap()
    22Monitor
  • Later →CVE-2025-38567Aug 19, 2025 · nfsd: avoid ref leak in nfsd_open_local_fh()
    18Monitor

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 Linux07091aade394f690e7b655578140ef84d0e8d7b0Vendor (CNA)
Linux Linux163b0d1a209fe0df5476c1df2330ca12b55abf92Vendor (CNA)
Linux Linux27d44145bd576bbef9bf6165bcd78128ec3e6cbdVendor (CNA)
Linux Linux5ffda7f3ed76ec8defc19d985e33b3b82ba07839Vendor (CNA)
Linux Linux7ff8521f30c4c2fcd4e88bd7640486602bf8a650Vendor (CNA)
Linux Linux92043120a2e992800580855498ab8507e1b22db9Vendor (CNA)
Linux Linux9b90a48c7de828a15c7a4fc565d46999c6e22d6bVendor (CNA)
Linux Linuxde85e72598d89880a02170a1cbc27b35a7d978a9Vendor (CNA)
Linux Linuxf41e9eba77bf97626e04296dc5677d02816d2432Vendor (CNA)
azl3 kernel 6.6.96.2-2 on Azure Linux 3.06.6.104.2-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.05.15.200.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.148-1 · Debian:12Package registry (OSV)
suse:kernel-default5.3.18-150300.59.235.1 · SUSE:Linux Enterprise Micro 5.2Package registry (OSV)
suse:kernel-default-base5.3.18-150300.59.235.1.150300.18.140.1 · SUSE:Linux Enterprise Micro 5.2Package registry (OSV)
suse:kernel-rt5.3.18-150300.235.1 · SUSE:Linux Enterprise Micro 5.2Package registry (OSV)
suse:kernel-source-rt5.3.18-150300.235.1 · SUSE:Linux Enterprise Micro 5.2Package registry (OSV)

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.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

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

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 (10 more)

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

All records