CVE-2024-57843

Guest crash via receive-fragment buffer overflow

Published Jan 11, 2025 · Updated Aug 5, 2026

Buffer overflow in the Linux kernel virtio-net receive path allows local users to crash a guest during receive-buffer refills. The allocation path reserves 16 bytes for virtnet_rq_dma at the start of a new one-page fragment but can then size the receive buffer past PAGE_SIZE. The condition is reliably reachable when net.core.high_order_alloc_disable is 1, and sustained transfers can crash the guest or cause transfer failures.

CVSS severity5.5
Medium
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in the Linux kernel virtio-net receive path allows local users to crash a guest during receive-buffer refills. The allocation path reserves 16 bytes for virtnet_rq_dma at the start of a new one-page fragment but can then size the receive buffer past PAGE_SIZE. The condition is reliably reachable when net.core.high_order_alloc_disable is 1, and sustained transfers can crash the guest or cause transfer failures.

The record

CVE
CVE-2024-57843
Published
Jan 11, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-191, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 11, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=295525e29a5b5694a6e96864f0c1365f79639863 <67a11de8965c2ab19e215fb6651d44847e068614
  2. Affected versionversion=295525e29a5b5694a6e96864f0c1365f79639863 <6aacd1484468361d1d04badfe75f264fa5314864
  3. Affected versionversion=295525e29a5b5694a6e96864f0c1365f79639863 <a8f7d6963768b114ec9644ff0148dde4c104e84b
  4. Affected versionversion=6.6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=295525e29a5b5694a6e96864f0c1365f79639863 <67a11de8965c2ab19e215fb6651d44847e068614; version=295525e29a5b5694a6e96864f0c1365f79639863 <6aacd1484468361d1d04badfe75f264fa5314864; version=295525e29a5b5694a6e96864f0c1365f79639863 <a8f7d6963768b114ec9644ff0148dde4c104e84b; version=6.6

Published CVSS scores

5.5OracleCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NIST NVDCVSS: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-191Integer Underflow (Wrap or Wraparound)
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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