CVE-2022-50168

Kernel memory corruption via premature BPF pack free

Published Jun 18, 2025 · Updated Aug 5, 2026

Use-after-free in the x86 BPF JIT in Linux 5.18 allows local users to corrupt kernel memory via a crafted multi-subprogram eBPF load. During jit_subprogs cleanup after one compilation fails, bpf_jit_free releases a shared 2 MB bpf_prog_pack before every subprogram has been finalized. Reaching the flaw requires an x86-64 host and CAP_BPF or CAP_SYS_ADMIN; reuse of the freed executable pack enables kernel disclosure, writes, control-flow hijacking, or a kernel crash.

CVSS severity7.8
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the x86 BPF JIT in Linux 5.18 allows local users to corrupt kernel memory via a crafted multi-subprogram eBPF load. During jit_subprogs cleanup after one compilation fails, bpf_jit_free releases a shared 2 MB bpf_prog_pack before every subprogram has been finalized. Reaching the flaw requires an x86-64 host and CAP_BPF or CAP_SYS_ADMIN; reuse of the freed executable pack enables kernel disclosure, writes, control-flow hijacking, or a kernel crash.

The record

CVE
CVE-2022-50168
Published
Jun 18, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=1022a5498f6f745c3b5fd3f050a5e11e7ca354f0 <1d5f82d9dd477d5c66e0214a68c3e4f308eadd6d
  2. Affected versionversion=1022a5498f6f745c3b5fd3f050a5e11e7ca354f0 <60e66074812dde9cde3d99cdd3caa9e40f1a4516
  3. Affected versionversion=1022a5498f6f745c3b5fd3f050a5e11e7ca354f0 <f91ce608a79c0db3e72bd63c23e011a9ebc31505
  4. Affected versionversion=5.18

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1022a5498f6f745c3b5fd3f050a5e11e7ca354f0 <1d5f82d9dd477d5c66e0214a68c3e4f308eadd6d; version=1022a5498f6f745c3b5fd3f050a5e11e7ca354f0 <60e66074812dde9cde3d99cdd3caa9e40f1a4516; version=1022a5498f6f745c3b5fd3f050a5e11e7ca354f0 <f91ce608a79c0db3e72bd63c23e011a9ebc31505; version=5.18

Published CVSS scores

7.8UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8Linux Kernel CVE TeamCVSS: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

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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

T1068Exploitation for Privilege Escalation

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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