CVE-2025-38002

Kernel memory disclosure via unlocked fdinfo reads

Published Jun 6, 2025 · Updated Aug 5, 2026

Use-after-free in Linux kernel 6.13 through 6.14.7 allows local users to disclose kernel memory or trigger a panic through io_uring fdinfo. io_uring_show_fdinfo() reads stale ctx->rings, ctx->sq_array, and ctx->sq_sqes pointers while another thread resizes and frees the old ring mappings. Any unprivileged local user can race reads of the process's own /proc/self/fdinfo entry against ring resizing, exposing kernel contents and enabling a reliable system panic.

CVSS severity7.8
High
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Linux kernel 6.13 through 6.14.7 allows local users to disclose kernel memory or trigger a panic through io_uring fdinfo. io_uring_show_fdinfo() reads stale ctx->rings, ctx->sq_array, and ctx->sq_sqes pointers while another thread resizes and frees the old ring mappings. Any unprivileged local user can race reads of the process's own /proc/self/fdinfo entry against ring resizing, exposing kernel contents and enabling a reliable system panic.

The record

CVE
CVE-2025-38002
Published
Jun 6, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Jun 6, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.13
  2. Affected versionversion=79cfe9e59c2a12c3b3faeeefe38d23f3d8030972 <bdb7d2ec2e31c46c45d1f32667dfa8216a72705e
  3. Affected versionversion=79cfe9e59c2a12c3b3faeeefe38d23f3d8030972 <d871198ee431d90f5308d53998c1ba1d5db5619a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=6.13; version=79cfe9e59c2a12c3b3faeeefe38d23f3d8030972 <bdb7d2ec2e31c46c45d1f32667dfa8216a72705e; version=79cfe9e59c2a12c3b3faeeefe38d23f3d8030972 <d871198ee431d90f5308d53998c1ba1d5db5619a

Published CVSS scores

5.5CanonicalCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.8CanonicalCVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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