CVE-2026-92519

Memory leak via incomplete BPF JIT cleanup

Published Sep 17, 2026 · Updated Oct 19, 2026

A memory leak in Linux's RISC-V BPF JIT allows local users to leave kernel memory allocated after subprogram compilation fails. The bpf_jit_free() function releases the JIT metadata without freeing jit_data->ctx.offset, which an earlier compilation pass retains for subsequent processing. Triggering requires access to BPF JIT compilation and failure in a later subprogram; the documented consequence is leaked kernel memory, not a demonstrated crash or data disclosure.

CVSS severity3.3
Low
EPSS probability0.21%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A memory leak in Linux's RISC-V BPF JIT allows local users to leave kernel memory allocated after subprogram compilation fails. The bpf_jit_free() function releases the JIT metadata without freeing jit_data->ctx.offset, which an earlier compilation pass retains for subsequent processing. Triggering requires access to BPF JIT compilation and failure in a later subprogram; the documented consequence is leaked kernel memory, not a demonstrated crash or data disclosure.

The record

CVE
CVE-2026-92519
Published
Sep 17, 2026
Updated
Oct 19, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 19, 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=48a8f78c50bd6f7f08fd40daa62252fd043f2f18 <2a3a29e90021806ea00527f6458cfd2edb58b42a
  2. Affected versionversion=48a8f78c50bd6f7f08fd40daa62252fd043f2f18 <369e4635d04801f394d5bd42556f21029e95ff93
  3. Affected versionversion=48a8f78c50bd6f7f08fd40daa62252fd043f2f18 <5cadc66b534fe8140441916200a20c7efb06a388
  4. Affected versionversion=48a8f78c50bd6f7f08fd40daa62252fd043f2f18 <b594c23f584ab032a5eae809eee81b809dd27330
  5. Affected versionversion=6.6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=48a8f78c50bd6f7f08fd40daa62252fd043f2f18 <2a3a29e90021806ea00527f6458cfd2edb58b42a; version=48a8f78c50bd6f7f08fd40daa62252fd043f2f18 <369e4635d04801f394d5bd42556f21029e95ff93; version=48a8f78c50bd6f7f08fd40daa62252fd043f2f18 <5cadc66b534fe8140441916200a20c7efb06a388; version=48a8f78c50bd6f7f08fd40daa62252fd043f2f18 <b594c23f584ab032a5eae809eee81b809dd27330; version=6.6

Published CVSS scores

3.3Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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