CVE-2026-74524

Local system crash via folded page-table indexing

Published Aug 15, 2026 · Updated Aug 15, 2026

Out-of-bounds page-table walking introduced in Linux 6.11 allows local users to crash RISC-V systems during memory hot-remove. In arch/riscv/mm/init.c, remove_pud_mapping() and remove_p4d_mapping() add a nonzero address index after folded-level helpers return the parent entry, walking beyond that table and passing an invalid page to __free_pages(). Reachability requires a RISC-V Sv39 or Sv48 system and a memory hot-remove operation; the reported consequence is a kernel crash.

CVSS severity5.5
Medium
EPSS probability0.17%
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 page-table walking introduced in Linux 6.11 allows local users to crash RISC-V systems during memory hot-remove. In arch/riscv/mm/init.c, remove_pud_mapping() and remove_p4d_mapping() add a nonzero address index after folded-level helpers return the parent entry, walking beyond that table and passing an invalid page to __free_pages(). Reachability requires a RISC-V Sv39 or Sv48 system and a memory hot-remove operation; the reported consequence is a kernel crash.

The record

CVE
CVE-2026-74524
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-787, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=6.11
  2. Affected versionversion=c75a74f4ba19c904c0ae1e011ae2568449409ae4 <1bb0ef8069ef158d245bac91ac178bb4f1a7ccd2
  3. Affected versionversion=c75a74f4ba19c904c0ae1e011ae2568449409ae4 <1da6d832eda02d908df11a30ba6a856b98a3dd76
  4. Affected versionversion=c75a74f4ba19c904c0ae1e011ae2568449409ae4 <54e07a158f7aea2754849d3a5a4cba1ac338ae7e
  5. Affected versionversion=c75a74f4ba19c904c0ae1e011ae2568449409ae4 <a0188cc133696627857d16054e43f9ebc7efc821

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.11; version=c75a74f4ba19c904c0ae1e011ae2568449409ae4 <1bb0ef8069ef158d245bac91ac178bb4f1a7ccd2; version=c75a74f4ba19c904c0ae1e011ae2568449409ae4 <1da6d832eda02d908df11a30ba6a856b98a3dd76; version=c75a74f4ba19c904c0ae1e011ae2568449409ae4 <54e07a158f7aea2754849d3a5a4cba1ac338ae7e; version=c75a74f4ba19c904c0ae1e011ae2568449409ae4 <a0188cc133696627857d16054e43f9ebc7efc821

Published CVSS scores

5.5Red HatCVSS: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 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-787Out-of-bounds Write
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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