CVE-2024-53241

Guest data disclosure via unmitigated hypercall returns

Published Dec 24, 2024 · Updated May 11, 2026

Information disclosure in the Linux kernel's x86 Xen guest support allows local users to read protected guest data. The Xen-provided hypercall page executes whole functions containing untransformed return instructions, bypassing guest-kernel rethunk or safe-ret speculation defenses. Exposure requires an x86 Xen guest using affected return-instruction mitigations; Arm systems are unaffected, and integrity or availability impact is not reported.

CVSS severity6.8
Medium
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in the Linux kernel's x86 Xen guest support allows local users to read protected guest data. The Xen-provided hypercall page executes whole functions containing untransformed return instructions, bypassing guest-kernel rethunk or safe-ret speculation defenses. Exposure requires an x86 Xen guest using affected return-instruction mitigations; Arm systems are unaffected, and integrity or availability impact is not reported.

The record

CVE
CVE-2024-53241
Published
Dec 24, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 24, 2024CVE 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=2.6.27
  2. Affected versionversion=cdacc1278b12d929f9a053c245ff3d16eb7af9f8 <05df6e6cd9a76b778aee33c3c18c9f3b3566d4a5
  3. Affected versionversion=cdacc1278b12d929f9a053c245ff3d16eb7af9f8 <82c211ead1ec440dbf81727e17b03b5e3c44b93d
  4. Affected versionversion=cdacc1278b12d929f9a053c245ff3d16eb7af9f8 <a2796dff62d6c6bfc5fbebdf2bee0d5ac0438906
  5. Affected versionversion=cdacc1278b12d929f9a053c245ff3d16eb7af9f8 <c7b4cfa6213a44fa48714186dfdf125072d036e3
  6. Affected versionversion=cdacc1278b12d929f9a053c245ff3d16eb7af9f8 <f7c3fdad0a474062d566aae3289d490d7e702d30
  7. Affected versionversion=cdacc1278b12d929f9a053c245ff3d16eb7af9f8 <fa719857f613fed94a79da055b13ca51214c694f

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.27; version=cdacc1278b12d929f9a053c245ff3d16eb7af9f8 <05df6e6cd9a76b778aee33c3c18c9f3b3566d4a5; version=cdacc1278b12d929f9a053c245ff3d16eb7af9f8 <82c211ead1ec440dbf81727e17b03b5e3c44b93d; version=cdacc1278b12d929f9a053c245ff3d16eb7af9f8 <a2796dff62d6c6bfc5fbebdf2bee0d5ac0438906; version=cdacc1278b12d929f9a053c245ff3d16eb7af9f8 <c7b4cfa6213a44fa48714186dfdf125072d036e3; version=cdacc1278b12d929f9a053c245ff3d16eb7af9f8 <f7c3fdad0a474062d566aae3289d490d7e702d30; version=cdacc1278b12d929f9a053c245ff3d16eb7af9f8 <fa719857f613fed94a79da055b13ca51214c694f

Published CVSS scores

6.8SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
5.7OracleCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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