BlackTreeIndependent security intelligence
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Full vulnerability report · 2022
CVE-2022-28893High confidence

The SUNRPC subsystem in the Linux kernel through 5.17.2 can call xs_xprt_free before ensuring that sockets are in the intended state

n/a · n/a

7.8HighCVSS 3.1
Recommended action
Within 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
Distribution package intelligence

Ubuntu vendor package status

Canonical’s release and source-package findings are shown separately from local repository availability.

1 package state
Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Ubuntu releaseSource packageVendor stateFixed versionEvidence
Ubuntu 24.04 LTSnoble · standard archivelinux-raspi-realtimeAffected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.Not published in this feedCanonical record ↗Source updated 4 Sept 2026
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2022-33328

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

The SUNRPC subsystem in the Linux kernel through 5.17.2 can call xs_xprt_free before ensuring that sockets are in the intended state.

What

The SUNRPC subsystem in the Linux kernel through 5.17.2 can call xs_xprt_free before ensuring that sockets are in the intended state.

Why

The program can continue using memory after it has been released, producing unsafe and attacker-influenceable behaviour.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

The SUNRPC subsystem in the Linux kernel through 5.17.2 can call xs_xprt_free before ensuring that sockets are in the intended state.

Why

The program can continue using memory after it has been released, producing unsafe and attacker-influenceable behaviour.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
local access → Use After Free → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Local
Privileges required
Low: a basic authenticated account is required
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-416

CWE-416: Use After Free. The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory belongs to the code that operates on the new pointer.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVLocalAttack vector: The attacker needs local access to the vulnerable system.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
The issue can support a local privilege or sandbox boundary transition; normal system utilities may then be available in the gained context.
CWE-416
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

BSI · German · WID-SEC-W-2022-0251Linux Kernel: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff

Ein lokaler Angreifer kann mehrere Schwachstellen in Linux Kernel ausnutzen, um einen nicht näher spezifizierten Angriff durchzuführen.

Official advisory
CERT-FR · French · CERTFR-2026-AVI-0287Multiples vulnérabilités dans les produits NetApp

De multiples vulnérabilités ont été découvertes dans les produits NetApp. Elles permettent à un attaquant de provoquer un déni de service à distance, une atteinte à la confidentialité des données et une atteinte à l'intégrité des données.

Official advisory
CERT-FR · French · CERTFR-2024-AVI-0115Multiples vulnérabilités dans le noyau Linux de RedHat

Record?id=CVE-2022-2078 Référence CVE CVE-2022-21499 https://www.cve.org/CVERecord?id=CVE-2022-21499 Référence CVE CVE-2022-23222 https://www.cve.org/CVERecord?id=CVE-2022-23222 Référence CVE CVE-2022-24448 https://www.cve.org/CVERecord?id=CVE-2022-24448 Référence CVE CVE-2022-25265 https://www.cve.org/CVERecord?id=CVE-2022-25265 Référence CVE CVE-2022-2586 https://www.cve.org/CVERecord?id=CVE-2022-2586 Référence CVE CVE-2022-2663 https://www.cve.org/CVERecord?id=CVE-2022-2663 Référence CVE CVE-2022-28388 https://www.cve.org/CVERecord?id=CVE-2022-28388 Référence CVE CVE-2022-28390 https://www.cve.org/CVERecord?id=CVE-2022-28390 Référence CVE CVE-2022-28893 https://www.cve.org/CVERecord?id=CVE-2022-28893 Référence CVE CVE-2022-3524 https://www.cve.org/CVERecord?id=CVE-2022-3524 Référence CVE CVE-2022-3545 https://www.cve.org/CVERecord?id=CVE-2022-3545 Référence CVE CVE-2022-3566 https://www.cve.org/CVERecord?id=CVE-2022-3566 Référence CVE CVE-2022-3594 https://www.cve.org/CVERecord?id=CVE-2022-3594 Référence CVE CVE-2022-3619 https://www.cve.org/CVERecord?id=CVE-2022-3619 Référence CVE CVE-2022-3623 https://www.cve.org/CVERecord?id=CVE-2022-3623 Référence CVE CVE-2022-36946 https://www.cve.org/CVERecord?id=CVE-2022-36946 Référence CVE CVE-2022-3707 https://www.cve.org/CVERecord?id=CVE-2022-3707

Official advisory
CERT-FR · French · CERTFR-2023-AVI-0258Multiples vulnérabilités dans les produits IBM

ve.org/CVERecord?id=CVE-2022-0854 Référence CVE CVE-2022-1016 https://www.cve.org/CVERecord?id=CVE-2022-1016 Référence CVE CVE-2022-2047 https://www.cve.org/CVERecord?id=CVE-2022-2047 Référence CVE CVE-2022-2421 https://www.cve.org/CVERecord?id=CVE-2022-2421 Référence CVE CVE-2022-2588 https://www.cve.org/CVERecord?id=CVE-2022-2588 Référence CVE CVE-2022-2601 https://www.cve.org/CVERecord?id=CVE-2022-2601 Référence CVE CVE-2022-27664 https://www.cve.org/CVERecord?id=CVE-2022-27664 Référence CVE CVE-2022-2879 https://www.cve.org/CVERecord?id=CVE-2022-2879 Référence CVE CVE-2022-2880 https://www.cve.org/CVERecord?id=CVE-2022-2880 Référence CVE CVE-2022-28893 https://www.cve.org/CVERecord?id=CVE-2022-28893 Référence CVE CVE-2022-32190 https://www.cve.org/CVERecord?id=CVE-2022-32190 Référence CVE CVE-2022-3996 https://www.cve.org/CVERecord?id=CVE-2022-3996 Référence CVE CVE-2022-4139 https://www.cve.org/CVERecord?id=CVE-2022-4139 Référence CVE CVE-2022-41715 https://www.cve.org/CVERecord?id=CVE-2022-41715 Référence CVE CVE-2022-41716 https://www.cve.org/CVERecord?id=CVE-2022-41716 Référence CVE CVE-2022-41717 https://www.cve.org/CVERecord?id=CVE-2022-41717 Référence CVE CVE-2022-4203 https://www.cve.org/CVERecord?id=CVE-2022-4203 Référence CVE CVE-2022-4269 https://www.cve.org/CVERecord?id=CVE-202

Official advisory
CERT-FR · French · CERTFR-2022-AVI-773Multiples vulnérabilités dans le noyau Linux d'Ubuntu

De multiples vulnérabilités ont été découvertes dans le noyau Linux d'Ubuntu. Elles permettent à un attaquant de provoquer une exécution de code arbitraire, un déni de service et une atteinte à la confidentialité des données.

Official advisory
CERT-FR · French · CERTFR-2022-AVI-740Multiples vulnérabilités dans le noyau Linux d'Ubuntu

De multiples vulnérabilités ont été découvertes dans le noyau Linux d'Ubuntu. Certaines d'entre elles permettent à un attaquant de provoquer une exécution de code arbitraire, un déni de service à distance et un contournement de la politique de sécurité.

Official advisory
CERT-FR · French · CERTFR-2022-AVI-700Multiples vulnérabilités dans le noyau Linux d'Ubuntu

De multiples vulnérabilités ont été découvertes dans le noyau Linux d'Ubuntu. Elles permettent à un attaquant de provoquer une exécution de code arbitraire, un déni de service et une élévation de privilèges.

Official advisory
CERT-FR · French · CERTFR-2022-AVI-567Multiples vulnérabilités dans le noyau Linux de SUSE

Record?id=CVE-2022-1966 Référence CVE CVE-2022-1974 https://www.cve.org/CVERecord?id=CVE-2022-1974 Référence CVE CVE-2022-1975 https://www.cve.org/CVERecord?id=CVE-2022-1975 Référence CVE CVE-2022-21123 https://www.cve.org/CVERecord?id=CVE-2022-21123 Référence CVE CVE-2022-21125 https://www.cve.org/CVERecord?id=CVE-2022-21125 Référence CVE CVE-2022-21127 https://www.cve.org/CVERecord?id=CVE-2022-21127 Référence CVE CVE-2022-21166 https://www.cve.org/CVERecord?id=CVE-2022-21166 Référence CVE CVE-2022-21180 https://www.cve.org/CVERecord?id=CVE-2022-21180 Référence CVE CVE-2022-21499 https://www.cve.org/CVERecord?id=CVE-2022-21499 Référence CVE CVE-2022-28893 https://www.cve.org/CVERecord?id=CVE-2022-28893 Référence CVE CVE-2022-30594 https://www.cve.org/CVERecord?id=CVE-2022-30594 Gestion détaillée du document le 17 juin 2022 Version initiale Alertes Avis Bulletins d’actualités Mentions légales Conditions générales À propos Contact cyber.gouv.fr service-public.fr legifrance.gouv.fr info.gouv.fr france.fr info.gouv.fr/risques Premier Ministre / Secrétariat Général de la Défense et de la Sécurité Nationale / Agence nationale de la sécurité des systèmes d'information

Official advisory
CERT-FR · French · CERTFR-2022-AVI-542Multiples vulnérabilités dans le noyau Linux de Debian

De multiples vulnérabilités ont été découvertes dans le noyau Linux de Debian. Certaines d'entre elles permettent à un attaquant de provoquer un problème de sécurité non spécifié par l'éditeur, un déni de service et une atteinte à l'intégrité des données.

Official advisory
CERT-FR · French · CERTFR-2022-AVI-1036Multiples vulnérabilités dans le noyau Linux de Red Hat

ecord?id=CVE-2022-21166 Référence CVE CVE-2022-21499 https://www.cve.org/CVERecord?id=CVE-2022-21499 Référence CVE CVE-2022-23816 https://www.cve.org/CVERecord?id=CVE-2022-23816 Référence CVE CVE-2022-23825 https://www.cve.org/CVERecord?id=CVE-2022-23825 Référence CVE CVE-2022-24448 https://www.cve.org/CVERecord?id=CVE-2022-24448 Référence CVE CVE-2022-2586 https://www.cve.org/CVERecord?id=CVE-2022-2586 Référence CVE CVE-2022-26373 https://www.cve.org/CVERecord?id=CVE-2022-26373 Référence CVE CVE-2022-2639 https://www.cve.org/CVERecord?id=CVE-2022-2639 Référence CVE CVE-2022-28390 https://www.cve.org/CVERecord?id=CVE-2022-28390 Référence CVE CVE-2022-28893 https://www.cve.org/CVERecord?id=CVE-2022-28893 Référence CVE CVE-2022-29581 https://www.cve.org/CVERecord?id=CVE-2022-29581 Référence CVE CVE-2022-29900 https://www.cve.org/CVERecord?id=CVE-2022-29900 Référence CVE CVE-2022-29901 https://www.cve.org/CVERecord?id=CVE-2022-29901 Référence CVE CVE-2022-36946 https://www.cve.org/CVERecord?id=CVE-2022-36946 Référence CVE CVE-2022-39190 https://www.cve.org/CVERecord?id=CVE-2022-39190 Gestion détaillée du document le 16 novembre 2022 Version initiale Alertes Avis Bulletins d’actualités Mentions légales Conditions générales À propos Contact cyber.gouv.fr service-public.fr legifrance.gouv.fr info.go

Official advisory
CERT-FR · French · CERTFR-2022-AVI-1002Multiples vulnérabilités dans le noyau Linux de Red Hat

Record?id=CVE-2022-2078 Référence CVE CVE-2022-21499 https://www.cve.org/CVERecord?id=CVE-2022-21499 Référence CVE CVE-2022-23960 https://www.cve.org/CVERecord?id=CVE-2022-23960 Référence CVE CVE-2022-24448 https://www.cve.org/CVERecord?id=CVE-2022-24448 Référence CVE CVE-2022-2586 https://www.cve.org/CVERecord?id=CVE-2022-2586 Référence CVE CVE-2022-26373 https://www.cve.org/CVERecord?id=CVE-2022-26373 Référence CVE CVE-2022-2639 https://www.cve.org/CVERecord?id=CVE-2022-2639 Référence CVE CVE-2022-27950 https://www.cve.org/CVERecord?id=CVE-2022-27950 Référence CVE CVE-2022-28390 https://www.cve.org/CVERecord?id=CVE-2022-28390 Référence CVE CVE-2022-28893 https://www.cve.org/CVERecord?id=CVE-2022-28893 Référence CVE CVE-2022-2938 https://www.cve.org/CVERecord?id=CVE-2022-2938 Référence CVE CVE-2022-29581 https://www.cve.org/CVERecord?id=CVE-2022-29581 Référence CVE CVE-2022-36946 https://www.cve.org/CVERecord?id=CVE-2022-36946 Gestion détaillée du document le 08 novembre 2022 Version initiale Alertes Avis Bulletins d’actualités Mentions légales Conditions générales À propos Contact cyber.gouv.fr service-public.fr legifrance.gouv.fr info.gouv.fr france.fr info.gouv.fr/risques Premier Ministre / Secrétariat Général de la Défense et de la Sécurité Nationale / Agence nationale de la sécurité des

Official advisory
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
n/a
Fixed
An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
Action
Review the linked authoritative reference and apply the recorded fixed release appropriate to the affected product branch.
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 11 Apr 2022 · Last source change 3 Aug 2024, 06:10 UTC · CWE-416 · Use After Free

CVE recordCVE.org · 5.1
CVSS sourceNIST NVD
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2022-33328
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceNIST NVD
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates →

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2022-28893 · cve.blacktree.nl