CVE-2022-2586 — Linux Kernel Use-After-Free Vulnerability
It was discovered that a nft object or expression could reference a nft set on a different nft table, leading to a use-after-free once that table was deleted.
Published
2024-01-08T17:46:06.110Z
Last modified
2025-10-21T23:05:29.297Z
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H
CISA KEV — Actively Exploited
01What is this vulnerability?
It was discovered that a nft object or expression could reference a nft set on a different nft table, leading to a use-after-free once that table was deleted.
02Affected products
| Vendor | Product | Versions |
|---|
| The Linux Kernel Organization | linux | 0 |
03Active exploitation status
Yes — actively exploited. Added to the CISA KEV catalog on 2024-06-26. Ransomware use: Unknown.
04Recommended remediation
- Patch to a fixed version listed in the vendor advisory (see references below).
- Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
- Hunt historical logs for exploitation indicators — see Detection signatures below.
05Technical details
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
06Detection signatures
Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:
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07Related CVEs
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.
08Timeline
- Published: 2024-01-08T17:46:06.110Z
- Last modified: 2025-10-21T23:05:29.297Z
- Added to CISA KEV: 2024-06-26
- BOD 22-01 due: 2024-07-17
09References
- ubuntu.com — https://ubuntu.com/security/notices/USN-5564-1
- ubuntu.com — https://ubuntu.com/security/notices/USN-5560-2
- ubuntu.com — https://ubuntu.com/security/notices/USN-5582-1
- ubuntu.com — https://ubuntu.com/security/notices/USN-5567-1
- ubuntu.com — https://ubuntu.com/security/notices/USN-5560-1
- ubuntu.com — https://ubuntu.com/security/notices/USN-5566-1
- www.openwall.com — https://www.openwall.com/lists/oss-security/2022/08/09/5
- ubuntu.com — https://ubuntu.com/security/notices/USN-5565-1
- www.zerodayinitiative.com — https://www.zerodayinitiative.com/advisories/ZDI-22-1118/
- lore.kernel.org — https://lore.kernel.org/netfilter-devel/20220809170148.164591-1-cascardo@canonic…
- ubuntu.com — https://ubuntu.com/security/notices/USN-5562-1
- ubuntu.com — https://ubuntu.com/security/notices/USN-5557-1
- cve.mitre.org — https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-2586
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