CVE-2025-38334

Kernel panic via poisoned SGX page reclaim

Published Jul 10, 2025 · Updated May 11, 2026

Denial of service in the Linux kernel allows local users to panic the host during reclaim of a poisoned SGX EPC page. arch_memory_failure() marks the page poisoned but leaves it on sgx_active_page_list, so the reclaimer executes EWB against contents that SGX microcode cannot safely access after a machine check. Reachability requires an x86 host with SGX EPC memory, a poisoned enclave page, and reclaim selection; the resulting core shutdown can panic the host.

CVSS severity5.5
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the Linux kernel allows local users to panic the host during reclaim of a poisoned SGX EPC page. arch_memory_failure() marks the page poisoned but leaves it on sgx_active_page_list, so the reclaimer executes EWB against contents that SGX microcode cannot safely access after a machine check. Reachability requires an x86 host with SGX EPC memory, a poisoned enclave page, and reclaim selection; the resulting core shutdown can panic the host.

The record

CVE
CVE-2025-38334
Published
Jul 10, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-754, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 10, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=5.11
  2. Affected versionversion=70d3b8ddcd20d3c859676f56c43c7b2360c70266 <00a88e9ea1b170d579c56327c38f7e8cf689df87
  3. Affected versionversion=70d3b8ddcd20d3c859676f56c43c7b2360c70266 <31dcbac94bfeabb86bf85b0c36803fdd6536437b
  4. Affected versionversion=70d3b8ddcd20d3c859676f56c43c7b2360c70266 <62b62a2a6dc51ed6e8e334861f04220c9cf8106a
  5. Affected versionversion=70d3b8ddcd20d3c859676f56c43c7b2360c70266 <dc5de5bd6deabd327ced2b2b1d0b4f14cd146afe
  6. Affected versionversion=70d3b8ddcd20d3c859676f56c43c7b2360c70266 <ed16618c380c32c68c06186d0ccbb0d5e0586e59

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.11; version=70d3b8ddcd20d3c859676f56c43c7b2360c70266 <00a88e9ea1b170d579c56327c38f7e8cf689df87; version=70d3b8ddcd20d3c859676f56c43c7b2360c70266 <31dcbac94bfeabb86bf85b0c36803fdd6536437b; version=70d3b8ddcd20d3c859676f56c43c7b2360c70266 <62b62a2a6dc51ed6e8e334861f04220c9cf8106a; version=70d3b8ddcd20d3c859676f56c43c7b2360c70266 <dc5de5bd6deabd327ced2b2b1d0b4f14cd146afe; version=70d3b8ddcd20d3c859676f56c43c7b2360c70266 <ed16618c380c32c68c06186d0ccbb0d5e0586e59

Published CVSS scores

5.5UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-754Improper Check for Unusual or Exceptional Conditions
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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