CVE-2024-46855

Service interruption via leaked socket references

Published Sep 27, 2024 · Updated Aug 5, 2026

Socket reference leakage in affected Linux kernel builds allows local users to interrupt service via crafted nftables traffic. In nft_socket_eval(), the NFT_SOCKET_MARK and NFT_SOCKET_WILDCARD failure paths return after a socket lookup without calling sock_gen_put() when the looked-up socket differs from skb->sk. Exploitation requires local access and low privileges to exercise the nftables socket expression; repeated evaluations retain socket references and can exhaust kernel resources until the host hangs or crashes.

CVSS severity7.5
High
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Socket reference leakage in affected Linux kernel builds allows local users to interrupt service via crafted nftables traffic. In nft_socket_eval(), the NFT_SOCKET_MARK and NFT_SOCKET_WILDCARD failure paths return after a socket lookup without calling sock_gen_put() when the looked-up socket differs from skb->sk. Exploitation requires local access and low privileges to exercise the nftables socket expression; repeated evaluations retain socket references and can exhaust kernel resources until the host hangs or crashes.

The record

CVE
CVE-2024-46855
Published
Sep 27, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-772, T1499.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 27, 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=039b1f4f24ecc8493b6bb9d70b4b78750d1b35c2 <076d281e90aaf4192799ecb9a1ed82321e133ecd
  2. Affected versionversion=039b1f4f24ecc8493b6bb9d70b4b78750d1b35c2 <1f68e097e20d3c695281a9c6433acc37be47fe11
  3. Affected versionversion=039b1f4f24ecc8493b6bb9d70b4b78750d1b35c2 <33c2258bf8cb17fba9e58b111d4c4f4cf43a4896
  4. Affected versionversion=039b1f4f24ecc8493b6bb9d70b4b78750d1b35c2 <6572440f78b724c46070841a68254ebc534cde24
  5. Affected versionversion=039b1f4f24ecc8493b6bb9d70b4b78750d1b35c2 <83e6fb59040e8964888afcaa5612cc1243736715
  6. Affected versionversion=039b1f4f24ecc8493b6bb9d70b4b78750d1b35c2 <8b26ff7af8c32cb4148b3e147c52f9e4c695209c
  7. Affected versionversion=039b1f4f24ecc8493b6bb9d70b4b78750d1b35c2 <ddc7c423c4a5386bf865474c694b48178efd311a
  8. Affected versionversion=4.19.76 <4.20
  9. Affected versionversion=5.2.18 <5.3
  10. Affected versionversion=5.3
  11. Affected versionversion=6934809432d23e9e0081f82d882b8fc765deeb4a
  12. Affected versionversion=f63432cd1bb224f61216e4a4726ff29ddffbed98

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=039b1f4f24ecc8493b6bb9d70b4b78750d1b35c2 <076d281e90aaf4192799ecb9a1ed82321e133ecd; version=039b1f4f24ecc8493b6bb9d70b4b78750d1b35c2 <1f68e097e20d3c695281a9c6433acc37be47fe11; version=039b1f4f24ecc8493b6bb9d70b4b78750d1b35c2 <33c2258bf8cb17fba9e58b111d4c4f4cf43a4896; version=039b1f4f24ecc8493b6bb9d70b4b78750d1b35c2 <6572440f78b724c46070841a68254ebc534cde24; version=039b1f4f24ecc8493b6bb9d70b4b78750d1b35c2 <83e6fb59040e8964888afcaa5612cc1243736715; version=039b1f4f24ecc8493b6bb9d70b4b78750d1b35c2 <8b26ff7af8c32cb4148b3e147c52f9e4c695209c; version=039b1f4f24ecc8493b6bb9d70b4b78750d1b35c2 <ddc7c423c4a5386bf865474c694b48178efd311a; version=4.19.76 <4.20; version=5.2.18 <5.3; version=5.3; version=6934809432d23e9e0081f82d882b8fc765deeb4a; version=f63432cd1bb224f61216e4a4726ff29ddffbed98

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.5Linux kernel CNACVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-772Missing Release of Resource after Effective Lifetime
T1499.001OS Exhaustion Flood

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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