CVE-2025-38375

Kernel memory disclosure and corruption via virtio lengths

Published Jul 25, 2025 · Updated Aug 5, 2026

Out-of-bounds memory access in Linux allows attackers controlling a virtio backend to disclose kernel memory, corrupt it, or crash the guest. The xdp_linearize_page path trusts used-ring lengths and copies subsequent receive buffers without checking each length against its allocated size, permitting oversized reads and unsigned-wraparound writes. Exploitation requires an XDP-enabled virtio-net guest and control of its backend; remote packets, guest credentials, and user interaction are insufficient and unnecessary.

CVSS severity8.4
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds memory access in Linux allows attackers controlling a virtio backend to disclose kernel memory, corrupt it, or crash the guest. The xdp_linearize_page path trusts used-ring lengths and copies subsequent receive buffers without checking each length against its allocated size, permitting oversized reads and unsigned-wraparound writes. Exploitation requires an XDP-enabled virtio-net guest and control of its backend; remote packets, guest credentials, and user interaction are insufficient and unnecessary.

The record

CVE
CVE-2025-38375
Published
Jul 25, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 25, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=4.14
  2. Affected versionversion=4941d472bf95b4345d6e38906fcf354e74afa311 <11f2d0e8be2b5e784ac45fa3da226492c3e506d8
  3. Affected versionversion=4941d472bf95b4345d6e38906fcf354e74afa311 <315dbdd7cdf6aa533829774caaf4d25f1fd20e73
  4. Affected versionversion=4941d472bf95b4345d6e38906fcf354e74afa311 <6aca3dad2145e864dfe4d1060f45eb1bac75dd58
  5. Affected versionversion=4941d472bf95b4345d6e38906fcf354e74afa311 <773e95c268b5d859f51f7547559734fd2a57660c
  6. Affected versionversion=4941d472bf95b4345d6e38906fcf354e74afa311 <80b971be4c37a4d23a7f1abc5ff33dc7733d649b
  7. Affected versionversion=4941d472bf95b4345d6e38906fcf354e74afa311 <982beb7582c193544eb9c6083937ec5ac1c9d651
  8. Affected versionversion=4941d472bf95b4345d6e38906fcf354e74afa311 <bc68bc3563344ccdc57d1961457cdeecab8f81ef
  9. Affected versionversion=4941d472bf95b4345d6e38906fcf354e74afa311 <ddc8649d363141fb3371dd81a73e1cb4ef8ed1e1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.14; version=4941d472bf95b4345d6e38906fcf354e74afa311 <11f2d0e8be2b5e784ac45fa3da226492c3e506d8; version=4941d472bf95b4345d6e38906fcf354e74afa311 <315dbdd7cdf6aa533829774caaf4d25f1fd20e73; version=4941d472bf95b4345d6e38906fcf354e74afa311 <6aca3dad2145e864dfe4d1060f45eb1bac75dd58; version=4941d472bf95b4345d6e38906fcf354e74afa311 <773e95c268b5d859f51f7547559734fd2a57660c; version=4941d472bf95b4345d6e38906fcf354e74afa311 <80b971be4c37a4d23a7f1abc5ff33dc7733d649b; version=4941d472bf95b4345d6e38906fcf354e74afa311 <982beb7582c193544eb9c6083937ec5ac1c9d651; version=4941d472bf95b4345d6e38906fcf354e74afa311 <bc68bc3563344ccdc57d1961457cdeecab8f81ef; version=4941d472bf95b4345d6e38906fcf354e74afa311 <ddc8649d363141fb3371dd81a73e1cb4ef8ed1e1

Published CVSS scores

5.2OracleCVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H
8.4Linux CNACVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1499.004Application or System Exploitation

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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