CVE-2024-26862

Kernel availability loss via lockless ignore_outgoing access

Published Apr 17, 2024 · Updated May 11, 2026

Race condition in the Linux kernel allows local users to interrupt service through concurrent AF_PACKET socket operations. The ignore_outgoing flag in packet_sock is read locklessly by dev_queue_xmit_nit() and packet_getsockopt() while packet_setsockopt() writes the same byte, permitting inconsistent access during packet transmission. Exploitation requires low-privileged local access and winning a high-complexity race; the bounded consequence is loss of kernel availability.

CVSS severity4.7
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in the Linux kernel allows local users to interrupt service through concurrent AF_PACKET socket operations. The ignore_outgoing flag in packet_sock is read locklessly by dev_queue_xmit_nit() and packet_getsockopt() while packet_setsockopt() writes the same byte, permitting inconsistent access during packet transmission. Exploitation requires low-privileged local access and winning a high-complexity race; the bounded consequence is loss of kernel availability.

The record

CVE
CVE-2024-26862
Published
Apr 17, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-362, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 17, 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

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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=4.20
  2. Affected versionversion=fa788d986a3aac5069378ed04697bd06f83d3488 <2c02c5059c78a52d170bdee4a369b470de6deb37
  3. Affected versionversion=fa788d986a3aac5069378ed04697bd06f83d3488 <68e84120319d4fc298fcdb14cf0bea6a0f64ffbd
  4. Affected versionversion=fa788d986a3aac5069378ed04697bd06f83d3488 <6ebfad33161afacb3e1e59ed1c2feefef70f9f97
  5. Affected versionversion=fa788d986a3aac5069378ed04697bd06f83d3488 <84c510411e321caff3c07e6cd0f917f06633cfc0
  6. Affected versionversion=fa788d986a3aac5069378ed04697bd06f83d3488 <8b1e273c6afcf00d3c40a54ada7d6aac1b503b97
  7. Affected versionversion=fa788d986a3aac5069378ed04697bd06f83d3488 <d35b62c224e70797f8a1c37fe9bc4b3e294b7560
  8. Affected versionversion=fa788d986a3aac5069378ed04697bd06f83d3488 <ee413f30ec4fe94a0bdf32c8f042cb06fa913234
  9. Affected versionversion=fa788d986a3aac5069378ed04697bd06f83d3488 <ef7eed7e11d23337310ecc2c014ecaeea52719c5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.20; version=fa788d986a3aac5069378ed04697bd06f83d3488 <2c02c5059c78a52d170bdee4a369b470de6deb37; version=fa788d986a3aac5069378ed04697bd06f83d3488 <68e84120319d4fc298fcdb14cf0bea6a0f64ffbd; version=fa788d986a3aac5069378ed04697bd06f83d3488 <6ebfad33161afacb3e1e59ed1c2feefef70f9f97; version=fa788d986a3aac5069378ed04697bd06f83d3488 <84c510411e321caff3c07e6cd0f917f06633cfc0; version=fa788d986a3aac5069378ed04697bd06f83d3488 <8b1e273c6afcf00d3c40a54ada7d6aac1b503b97; version=fa788d986a3aac5069378ed04697bd06f83d3488 <d35b62c224e70797f8a1c37fe9bc4b3e294b7560; version=fa788d986a3aac5069378ed04697bd06f83d3488 <ee413f30ec4fe94a0bdf32c8f042cb06fa913234; version=fa788d986a3aac5069378ed04697bd06f83d3488 <ef7eed7e11d23337310ecc2c014ecaeea52719c5

Published CVSS scores

4.7NISTCVSS: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.

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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-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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