CVE-2024-41091

Host memory disclosure and crash via short frames

Published Jul 29, 2024 · Updated Aug 5, 2026

Out-of-bounds access in the Linux kernel allows local users or guest OS users to disclose kernel memory or crash the host via short TAP frames. The tun_xdp_one() path passes frames shorter than ETH_HLEN to eth_type_trans(), which reads beyond valid frame data and propagates an skb with inconsistent header metadata. Reachability requires local access to a vhost-net TX ring and TAP backend, or access from a guest using virtio-net backed by vhost-net; a crafted zero-data descriptor can expose adjacent kernel memory or panic the host.

CVSS severity8.8
High
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds access in the Linux kernel allows local users or guest OS users to disclose kernel memory or crash the host via short TAP frames. The tun_xdp_one() path passes frames shorter than ETH_HLEN to eth_type_trans(), which reads beyond valid frame data and propagates an skb with inconsistent header metadata. Reachability requires local access to a vhost-net TX ring and TAP backend, or access from a guest using virtio-net backed by vhost-net; a crafted zero-data descriptor can expose adjacent kernel memory or panic the host.

The record

CVE
CVE-2024-41091
Published
Jul 29, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 29, 2024CVE 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=043d222f93ab8c76b56a3b315cd8692e35affb6c <049584807f1d797fc3078b68035450a9769eb5c3
  2. Affected versionversion=043d222f93ab8c76b56a3b315cd8692e35affb6c <32b0aaba5dbc85816898167d9b5d45a22eae82e9
  3. Affected versionversion=043d222f93ab8c76b56a3b315cd8692e35affb6c <589382f50b4a5d90d16d8bc9dcbc0e927a3e39b2
  4. Affected versionversion=043d222f93ab8c76b56a3b315cd8692e35affb6c <6100e0237204890269e3f934acfc50d35fd6f319
  5. Affected versionversion=043d222f93ab8c76b56a3b315cd8692e35affb6c <8418f55302fa1d2eeb73e16e345167e545c598a5
  6. Affected versionversion=043d222f93ab8c76b56a3b315cd8692e35affb6c <a9d1c27e2ee3b0ea5d40c105d6e728fc114470bb
  7. Affected versionversion=043d222f93ab8c76b56a3b315cd8692e35affb6c <ad6b3f622ccfb4bfedfa53b6ebd91c3d1d04f146
  8. Affected versionversion=043d222f93ab8c76b56a3b315cd8692e35affb6c <d5ad89b7d01ed4e66fd04734fc63d6e78536692a
  9. Affected versionversion=4.20

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=043d222f93ab8c76b56a3b315cd8692e35affb6c <049584807f1d797fc3078b68035450a9769eb5c3; version=043d222f93ab8c76b56a3b315cd8692e35affb6c <32b0aaba5dbc85816898167d9b5d45a22eae82e9; version=043d222f93ab8c76b56a3b315cd8692e35affb6c <589382f50b4a5d90d16d8bc9dcbc0e927a3e39b2; version=043d222f93ab8c76b56a3b315cd8692e35affb6c <6100e0237204890269e3f934acfc50d35fd6f319; version=043d222f93ab8c76b56a3b315cd8692e35affb6c <8418f55302fa1d2eeb73e16e345167e545c598a5; version=043d222f93ab8c76b56a3b315cd8692e35affb6c <a9d1c27e2ee3b0ea5d40c105d6e728fc114470bb; version=043d222f93ab8c76b56a3b315cd8692e35affb6c <ad6b3f622ccfb4bfedfa53b6ebd91c3d1d04f146; version=043d222f93ab8c76b56a3b315cd8692e35affb6c <d5ad89b7d01ed4e66fd04734fc63d6e78536692a; version=4.20

Published CVSS scores

7.1NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
8.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/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-125Out-of-bounds Read
T1068Exploitation for Privilege Escalation

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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