CVE-2024-26924

Local privilege escalation via nft_set_pipapo use-after-free

Published Apr 24, 2024 · Updated Aug 5, 2026

Use-after-free in nft_set_pipapo in Linux 5.6 through 6.9-rc4 allows local users to escalate privileges via crafted nftables batches. A duplicate-key add and delete sequence makes nft_pipapo_remove() unmap the wrong element, leaving a freed element reachable through packet lookup. Local users can obtain namespace-scoped CAP_NET_ADMIN to poison the set; a matching packet can crash the host or enable kernel control-flow hijacking.

CVSS severity7.8
High
EPSS probability0.85%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in nft_set_pipapo in Linux 5.6 through 6.9-rc4 allows local users to escalate privileges via crafted nftables batches. A duplicate-key add and delete sequence makes nft_pipapo_remove() unmap the wrong element, leaving a freed element reachable through packet lookup. Local users can obtain namespace-scoped CAP_NET_ADMIN to poison the set; a matching packet can crash the host or enable kernel control-flow hijacking.

The record

CVE
CVE-2024-26924
Published
Apr 24, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1068, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 24, 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=3c4287f62044a90e73a561aa05fc46e62da173da <14b001ba221136c15f894577253e8db535b99487
  2. Affected versionversion=3c4287f62044a90e73a561aa05fc46e62da173da <3cfc9ec039af60dbd8965ae085b2c2ccdcfbe1cc
  3. Affected versionversion=3c4287f62044a90e73a561aa05fc46e62da173da <41d8fdf3afaff312e17466e4ab732937738d5644
  4. Affected versionversion=3c4287f62044a90e73a561aa05fc46e62da173da <7a1679e2d9bfa3b5f8755c2c7113e54b7d42bd46
  5. Affected versionversion=3c4287f62044a90e73a561aa05fc46e62da173da <e3b887a9c11caf8357a821260e095f2a694a34f2
  6. Affected versionversion=3c4287f62044a90e73a561aa05fc46e62da173da <ebf7c9746f073035ee26209e38c3a1170f7b349a
  7. Affected versionversion=5.6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3c4287f62044a90e73a561aa05fc46e62da173da <14b001ba221136c15f894577253e8db535b99487; version=3c4287f62044a90e73a561aa05fc46e62da173da <3cfc9ec039af60dbd8965ae085b2c2ccdcfbe1cc; version=3c4287f62044a90e73a561aa05fc46e62da173da <41d8fdf3afaff312e17466e4ab732937738d5644; version=3c4287f62044a90e73a561aa05fc46e62da173da <7a1679e2d9bfa3b5f8755c2c7113e54b7d42bd46; version=3c4287f62044a90e73a561aa05fc46e62da173da <e3b887a9c11caf8357a821260e095f2a694a34f2; version=3c4287f62044a90e73a561aa05fc46e62da173da <ebf7c9746f073035ee26209e38c3a1170f7b349a; version=5.6
The Linux Kernel Organization · Linux Kernelversion=3c4287f62044; version=5.6

Published CVSS scores

5.9CISA ADPCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
7.8Linux CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/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-476NULL Pointer Dereference
T1068Exploitation for Privilege Escalation
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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