CVE-2026-99092Public exploit

JIT failure via read-only executable memory writes

Published Oct 26, 2026 · Updated Oct 26, 2026

BPF JIT failure in the Linux RISC-V kernel allows local users to trigger warnings by loading programs on affected configurations. In arch/riscv/kernel/patch.c, patch_map() returns read-only BPF executable memory without a writable alias when CONFIG_STRICT_MODULE_RWX=n, causing instruction copying to fail. MMU-enabled builds fall back to interpretation unless CONFIG_BPF_JIT_ALWAYS_ON=y, which also causes a demonstrated boot panic during PTP classifier initialization without user involvement.

CVSS severityUnavailable
Unscored
EPSS probability0.16%
Next 30 days · Nov 1, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

BPF JIT failure in the Linux RISC-V kernel allows local users to trigger warnings by loading programs on affected configurations. In arch/riscv/kernel/patch.c, patch_map() returns read-only BPF executable memory without a writable alias when CONFIG_STRICT_MODULE_RWX=n, causing instruction copying to fail. MMU-enabled builds fall back to interpretation unless CONFIG_BPF_JIT_ALWAYS_ON=y, which also causes a demonstrated boot panic during PTP classifier initialization without user involvement.

The record

CVE
CVE-2026-99092
Published
Oct 26, 2026
Updated
Oct 26, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 26, 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?

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  1. Affected versionversion=2c9e5d4a008293407836d29d35dfd4353615bd2f <562a35b9e0b3d9483d9472995219cadb3592db3d
  2. Affected versionversion=2c9e5d4a008293407836d29d35dfd4353615bd2f <9e8fc7972b398e9dc2415ece283d8f64edac3858
  3. Affected versionversion=2c9e5d4a008293407836d29d35dfd4353615bd2f <a510e1ae8c9030750c2edf7b0bc9b186cd8c7a06
  4. Affected versionversion=2c9e5d4a008293407836d29d35dfd4353615bd2f <f71d6ea3843c8038c431c2699482f246aea37ca0
  5. Affected versionversion=6.10

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=2c9e5d4a008293407836d29d35dfd4353615bd2f <562a35b9e0b3d9483d9472995219cadb3592db3d; version=2c9e5d4a008293407836d29d35dfd4353615bd2f <9e8fc7972b398e9dc2415ece283d8f64edac3858; version=2c9e5d4a008293407836d29d35dfd4353615bd2f <a510e1ae8c9030750c2edf7b0bc9b186cd8c7a06; version=2c9e5d4a008293407836d29d35dfd4353615bd2f <f71d6ea3843c8038c431c2699482f246aea37ca0; version=6.10

Published CVSS scores

No CVSS assessment is available in this record.

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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

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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