CVE-2026-74429Network attack vector

Kernel oops via premature RxRPC reply processing

Published Aug 15, 2026 · Updated Aug 15, 2026

Denial of service in the Linux kernel allows remote attackers to trigger a kernel oops via an early RxRPC reply DATA packet. Before the client exposes a call by sending its first request packet, rxrpc_receiving_reply() accepts an apparent reply and rxrpc_rotate_tx_window() iterates an empty transmit queue. An attacker must reach an application using AF_RXRPC and win this early-reply ordering; successful exploitation disrupts the affected kernel execution path.

CVSS severity7.5
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the Linux kernel allows remote attackers to trigger a kernel oops via an early RxRPC reply DATA packet. Before the client exposes a call by sending its first request packet, rxrpc_receiving_reply() accepts an apparent reply and rxrpc_rotate_tx_window() iterates an empty transmit queue. An attacker must reach an application using AF_RXRPC and win this early-reply ordering; successful exploitation disrupts the affected kernel execution path.

The record

CVE
CVE-2026-74429
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=6.14
  2. Affected versionversion=b341a0263b1b804d329f864c2dc24815364510ec <a58e33405acd2584e730c1da72635f822ada6b49
  3. Affected versionversion=b341a0263b1b804d329f864c2dc24815364510ec <e220ae559e5a0fc33e41ec6a348ea50387cb8b0f
  4. Affected versionversion=b341a0263b1b804d329f864c2dc24815364510ec <f9be514984471ff0003738b2e1efed12bc3433ff

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.14; version=b341a0263b1b804d329f864c2dc24815364510ec <a58e33405acd2584e730c1da72635f822ada6b49; version=b341a0263b1b804d329f864c2dc24815364510ec <e220ae559e5a0fc33e41ec6a348ea50387cb8b0f; version=b341a0263b1b804d329f864c2dc24815364510ec <f9be514984471ff0003738b2e1efed12bc3433ff

Published CVSS scores

7.5Amazon LinuxCVSS:3.1/AV:N/AC:L/PR:N/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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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