CVE-2022-49967

Local denial of service via torn limit read

Published Jun 18, 2025 · Updated May 23, 2026

Data race in Linux kernel BPF JIT accounting allows local users to cause denial of service through a torn bpf_jit_limit read. In kernel/bpf/core.c, bpf_jit_charge_modmem compares current JIT memory with bpf_jit_limit through an ordinary long-sized load while the sysctl path can update that value concurrently. Reachability requires low-privileged local access and a concurrent sysctl update; the published impact is limited to service availability.

CVSS severity4.7
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Data race in Linux kernel BPF JIT accounting allows local users to cause denial of service through a torn bpf_jit_limit read. In kernel/bpf/core.c, bpf_jit_charge_modmem compares current JIT memory with bpf_jit_limit through an ordinary long-sized load while the sysctl path can update that value concurrently. Reachability requires low-privileged local access and a concurrent sysctl update; the published impact is limited to service availability.

The record

CVE
CVE-2022-49967
Published
Jun 18, 2025
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-362, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 2025CVE publishedPublication date reported by the CVE source.
  2. May 23, 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=4.14.140 <4.15
  2. Affected versionversion=4.19.47 <4.20
  3. Affected versionversion=4.20
  4. Affected versionversion=43caa29c99db5a41b204e8ced01b00e151335ca8
  5. Affected versionversion=4.9.190 <4.10
  6. Affected versionversion=a1fe647042affe713a17243cd10e9b25f3d83948
  7. Affected versionversion=c98446e1bab6253ddce7144cc2a91c400a323839
  8. Affected versionversion=ede95a63b5e84ddeea6b0c473b36ab8bfd8c6ce3 <0947ae1121083d363d522ff7518ee72b55bd8d29
  9. Affected versionversion=ede95a63b5e84ddeea6b0c473b36ab8bfd8c6ce3 <ba632ad0bacb13197a8f38e7526448974e87f292

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.14.140 <4.15; version=4.19.47 <4.20; version=4.20; version=43caa29c99db5a41b204e8ced01b00e151335ca8; version=4.9.190 <4.10; version=a1fe647042affe713a17243cd10e9b25f3d83948; version=c98446e1bab6253ddce7144cc2a91c400a323839; version=ede95a63b5e84ddeea6b0c473b36ab8bfd8c6ce3 <0947ae1121083d363d522ff7518ee72b55bd8d29; version=ede95a63b5e84ddeea6b0c473b36ab8bfd8c6ce3 <ba632ad0bacb13197a8f38e7526448974e87f292

Published CVSS scores

4.7NIST NVDCVSS:3.1/AV:L/AC:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
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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