CVE-2024-26588

Kernel crash via unconditional next-instruction read

Published Feb 22, 2024 · Updated May 11, 2026

Out-of-bounds read in the LoongArch BPF JIT in Linux 6.1 and later allows local users to trigger a kernel page fault via a BPF program. The build_insn function reads (insn + 1)->imm unconditionally when the final instruction ends at a page boundary, even outside imm64 handling. Reaching the demonstrated fault requires a LoongArch kernel with 16 KB pages and permission to load BPF programs; the observed consequence is a kernel Oops and service interruption.

CVSS severity7.8
High
EPSS probability0.24%
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 read in the LoongArch BPF JIT in Linux 6.1 and later allows local users to trigger a kernel page fault via a BPF program. The build_insn function reads (insn + 1)->imm unconditionally when the final instruction ends at a page boundary, even outside imm64 handling. Reaching the demonstrated fault requires a LoongArch kernel with 16 KB pages and permission to load BPF programs; the observed consequence is a kernel Oops and service interruption.

The record

CVE
CVE-2024-26588
Published
Feb 22, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125, CWE-119, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 22, 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=6.1
  2. Affected versionversion=bbfddb904df6f82a5948687a2d57766216b9bc0f <36a87385e31c9343af9a4756598e704741250a67
  3. Affected versionversion=bbfddb904df6f82a5948687a2d57766216b9bc0f <4631c2dd69d928bca396f9f58baeddf85e14ced5
  4. Affected versionversion=bbfddb904df6f82a5948687a2d57766216b9bc0f <7924ade13a49c0067da6ea13e398102979c0654a
  5. Affected versionversion=bbfddb904df6f82a5948687a2d57766216b9bc0f <9aeb09f4d85a87bac46c010d75a2ea299d462f28

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.1; version=bbfddb904df6f82a5948687a2d57766216b9bc0f <36a87385e31c9343af9a4756598e704741250a67; version=bbfddb904df6f82a5948687a2d57766216b9bc0f <4631c2dd69d928bca396f9f58baeddf85e14ced5; version=bbfddb904df6f82a5948687a2d57766216b9bc0f <7924ade13a49c0067da6ea13e398102979c0654a; version=bbfddb904df6f82a5948687a2d57766216b9bc0f <9aeb09f4d85a87bac46c010d75a2ea299d462f28

Published CVSS scores

7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1499Endpoint Denial of Service

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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