CVE-2024-42246

Kernel freeze via unhandled BPF connection denial

Published Aug 7, 2024 · Updated May 11, 2026

Infinite loop in SUNRPC TCP setup in affected Linux kernel releases allows local users to freeze the kernel through a BPF-denied connection. xs_tcp_setup_socket repeatedly retries when kernel_connect returns EPERM instead of remapping that unexpected result to a conventional network error. Exploitation requires local access and a BPF program attached to kernel_connect; the loop floods syslog and can leave the host unresponsive.

CVSS severity5.5
Medium
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

Infinite loop in SUNRPC TCP setup in affected Linux kernel releases allows local users to freeze the kernel through a BPF-denied connection. xs_tcp_setup_socket repeatedly retries when kernel_connect returns EPERM instead of remapping that unexpected result to a conventional network error. Exploitation requires local access and a BPF program attached to kernel_connect; the loop floods syslog and can leave the host unresponsive.

The record

CVE
CVE-2024-42246
Published
Aug 7, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-835, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 7, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.17
  2. Affected versionversion=4fbac77d2d092b475dda9eea66da674369665427 <02ee1976edb21a96ce8e3fd4ef563f14cc16d041
  3. Affected versionversion=4fbac77d2d092b475dda9eea66da674369665427 <5d8254e012996cee1a0f9cc920531cb7e4d9a011
  4. Affected versionversion=4fbac77d2d092b475dda9eea66da674369665427 <626dfed5fa3bfb41e0dffd796032b555b69f9cde
  5. Affected versionversion=4fbac77d2d092b475dda9eea66da674369665427 <934247ea65bc5eca8bdb7f8c0ddc15cef992a5d6
  6. Affected versionversion=4fbac77d2d092b475dda9eea66da674369665427 <bc790261218952635f846aaf90bcc0974f6f62c6
  7. Affected versionversion=4fbac77d2d092b475dda9eea66da674369665427 <d6c686c01c5f12ff8f7264e0ddf71df6cb0d4414
  8. Affected versionversion=4fbac77d2d092b475dda9eea66da674369665427 <f2431e7db0fe0daccb2f06bb0d23740affcd2fa6
  9. Affected versionversion=4fbac77d2d092b475dda9eea66da674369665427 <f388cfd913a2b96c05339a335f365795db1b36b6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.17; version=4fbac77d2d092b475dda9eea66da674369665427 <02ee1976edb21a96ce8e3fd4ef563f14cc16d041; version=4fbac77d2d092b475dda9eea66da674369665427 <5d8254e012996cee1a0f9cc920531cb7e4d9a011; version=4fbac77d2d092b475dda9eea66da674369665427 <626dfed5fa3bfb41e0dffd796032b555b69f9cde; version=4fbac77d2d092b475dda9eea66da674369665427 <934247ea65bc5eca8bdb7f8c0ddc15cef992a5d6; version=4fbac77d2d092b475dda9eea66da674369665427 <bc790261218952635f846aaf90bcc0974f6f62c6; version=4fbac77d2d092b475dda9eea66da674369665427 <d6c686c01c5f12ff8f7264e0ddf71df6cb0d4414; version=4fbac77d2d092b475dda9eea66da674369665427 <f2431e7db0fe0daccb2f06bb0d23740affcd2fa6; version=4fbac77d2d092b475dda9eea66da674369665427 <f388cfd913a2b96c05339a335f365795db1b36b6

Published CVSS scores

5.5NISTCVSS:3.1/AV:L/AC:L/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.

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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-835Loop with Unreachable Exit Condition ('Infinite Loop')
T1499.004Application or System Exploitation

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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