CVE-2024-57877

Kernel-stack disclosure via zero-length SETREGSET

Published Jan 11, 2025 · Updated May 11, 2026

Information disclosure in arm64 ptrace in Linux 6.12 through 6.12.4 and 6.13-rc1 allows local users to read 64 bits of kernel-stack data. The poe_set() handler leaves its temporary ctrl value uninitialized when NT_ARM_POE SETREGSET receives a zero-length write, then stores that stack value in target->thread.por_el0. A local user with ptrace access to a target process can retrieve the value through GETREGSET; disclosure is limited to one stack slot and provides no write primitive.

CVSS severity6.1
Medium
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

Information disclosure in arm64 ptrace in Linux 6.12 through 6.12.4 and 6.13-rc1 allows local users to read 64 bits of kernel-stack data. The poe_set() handler leaves its temporary ctrl value uninitialized when NT_ARM_POE SETREGSET receives a zero-length write, then stores that stack value in target->thread.por_el0. A local user with ptrace access to a target process can retrieve the value through GETREGSET; disclosure is limited to one stack slot and provides no write primitive.

The record

CVE
CVE-2024-57877
Published
Jan 11, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-908
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 11, 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=17519819926211e6b2834e00e4554bec0daf22ac <4105dd76bc8ad6529d47157ef0565cb84ca6676c
  2. Affected versionversion=17519819926211e6b2834e00e4554bec0daf22ac <594bfc4947c4fcabba1318d8384c61a29a6b89fb
  3. Affected versionversion=6.12

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=17519819926211e6b2834e00e4554bec0daf22ac <4105dd76bc8ad6529d47157ef0565cb84ca6676c; version=17519819926211e6b2834e00e4554bec0daf22ac <594bfc4947c4fcabba1318d8384c61a29a6b89fb; version=6.12

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
6.1CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/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 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

CWE-908Use of Uninitialized Resource

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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