kernel/bpf/verifier.c in the Linux kernel through 5.15.14 allows local users to gain privileges because of the availability of pointer arithmetic via certain *_OR_NULL pointer types
Unknown · Unknown
7.8HighCVSS 3.1
Recommended action
Within 7 days
High technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.
Published severityHigh→Operational priority:High, unchanged from published severity.unchanged
Evidence used
No CISA KEV confirmation is currently recorded.
A structured source references public exploit or proof-of-concept material.
Exploitation requires an existing local or physical foothold with privileges.
EPSS is 1.92% for the current model date.
Compensating controls
Validate the affected product branch and deploy the verified fixed release.
Restrict local access and enforce least privilege on affected hosts.
Increase monitoring for the attack path and post-exploitation behaviour described in the report.
Verification
Confirm that the asset runs Unknown Unknown and falls inside the recorded affected range.
Verify the installed build against the product-specific fixed version after deployment.
Validate exposure, authentication requirements and compensating controls in the actual environment.
Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Distribution package intelligence
Release-specific package status
Debian findings are scoped to the named distribution, release and source package. An absent finding does not mean a package is unaffected.
4 package states
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.
Distribution release
Source package
Vendor state
Fixed version
Evidence
Debian trixietrixie · source
linux
Vendor fix publishedDebian records a fixed source-package version for this release.
National CERT insights ?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.
Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.
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-2022-28310
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 with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.
Patch available
01
What, why and how
kernel/bpf/verifier.c in the Linux kernel through 5.15.14 allows local users to gain privileges because of the availability of pointer arithmetic via certain *_OR_NULL pointer types.
What
kernel/bpf/verifier.c in the Linux kernel through 5.15.14 allows local users to gain privileges because of the availability of pointer arithmetic via certain *_OR_NULL pointer types.
Why
The product dereferences a pointer that it expects to be valid but is NULL.
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
kernel/bpf/verifier.c in the Linux kernel through 5.15.14 allows local users to gain privileges because of the availability of pointer arithmetic via certain *_OR_NULL pointer types.
Why
The product dereferences a pointer that it expects to be valid but is NULL.
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.Reference recorded
A structured CVE source labels at least one public reference as exploit material. BlackTree has not independently validated that it is safe, reliable or weaponised.
Likely attack path
local access → NULL Pointer Dereference → 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-476: NULL Pointer Dereference. The product dereferences a pointer that it expects to be valid but is NULL.
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-476Public exploit reference
A
Official authority intelligence
Only matched European and national findings are included. Language selectors and unavailable sources are omitted.
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Google Android ausnutzen, um seine Privilegien zu erhöhen, vertrauliche Informationen offenzulegen, beliebigen Code auszuführen und einen Denial-of-Service-Zustand auszulösen.
Official advisory ↗BSI · German · WID-SEC-2022-0138Linux Kernel: Schwachstelle ermöglicht Privilegieneskalation
Ein lokaler Angreifer kann eine Schwachstelle im Linux Kernel ausnutzen, um seine Privilegien zu erhöhen.
Official advisory ↗Cyber Security Agency of Singapore · English · CSA-SB-20220119Security Bulletin 19 Jan 2022
The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 19 Jan 2022, published on 19 January 2022. Open the linked bulletin for the product, severity and reference information published in that issue.
Official advisory ↗CERT-FR · French · CERTFR-2024-AVI-1032Multiples vulnérabilités dans le noyau Linux de Red Hat
e sécurité Red Hat RHSA-2024:10275 du 26 novembre 2024
https://access.redhat.com/errata/RHSA-2024:10275
Bulletin de sécurité Red Hat RHSA-2024:10281 du 26 novembre 2024
https://access.redhat.com/errata/RHSA-2024:10281
Bulletin de sécurité Red Hat RHSA-2024:10282 du 26 novembre 2024
https://access.redhat.com/errata/RHSA-2024:10282
Référence CVE CVE-2021-4204
https://www.cve.org/CVERecord?id=CVE-2021-4204
Référence CVE CVE-2021-47393
https://www.cve.org/CVERecord?id=CVE-2021-47393
Référence CVE CVE-2021-47461
https://www.cve.org/CVERecord?id=CVE-2021-47461
Référence CVE CVE-2022-0500
https://www.cve.org/CVERecord?id=CVE-2022-0500
Référence CVE CVE-2022-23222
https://www.cve.org/CVERecord?id=CVE-2022-23222
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https://www.cve.org/CVERecord?id=CVE-2022-48686
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https://www.cve.org/CVERecord?id=CVE-2022-48773
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https://www.cve.org/CVERecord?id=CVE-2022-48786
Référence CVE CVE-2022-48929
https://www.cve.org/CVERecord?id=CVE-2022-48929
Référence CVE CVE-2023-0597
https://www.cve.org/CVERecord?id=CVE-2023-0597
Référence CVE CVE-2023-52489
https://www.cve.org/CVERecord?id=CVE-2023-52489
Référence CVE CVE-2024-26671
https://www.cve.org/CVERecord?id=CVE-2024-26671
Référence CVE CVE-2024-26961
https://www.cve.org/CVERecord?id=CV
Official advisory ↗CERT-FR · French · CERTFR-2024-AVI-0840Multiples vulnérabilités dans le noyau Linux de SUSE
Official advisory ↗CERT-FR · French · CERTFR-2022-AVI-323Multiples vulnérabilités dans le noyau Linux d'Ubuntu
e.org/CVERecord?id=CVE-2021-45402
Référence CVE CVE-2021-45480
https://www.cve.org/CVERecord?id=CVE-2021-45480
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https://www.cve.org/CVERecord?id=CVE-2022-0264
Référence CVE CVE-2022-0382
https://www.cve.org/CVERecord?id=CVE-2022-0382
Référence CVE CVE-2022-0435
https://www.cve.org/CVERecord?id=CVE-2022-0435
Référence CVE CVE-2022-0492
https://www.cve.org/CVERecord?id=CVE-2022-0492
Référence CVE CVE-2022-0516
https://www.cve.org/CVERecord?id=CVE-2022-0516
Référence CVE CVE-2022-0742
https://www.cve.org/CVERecord?id=CVE-2022-0742
Référence CVE CVE-2022-1055
https://www.cve.org/CVERecord?id=CVE-2022-1055
Référence CVE CVE-2022-23222
https://www.cve.org/CVERecord?id=CVE-2022-23222
Référence CVE CVE-2022-27666
https://www.cve.org/CVERecord?id=CVE-2022-27666
Gestion détaillée du document
le 08 avril 2022
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sécurité des systèmes d'information
Official advisory ↗CERT-FR · French · CERTFR-2022-AVI-299Multiples vulnérabilités dans le noyau Linux d'Ubuntu
ve.org/CVERecord?id=CVE-2022-0185
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https://www.cve.org/CVERecord?id=CVE-2022-0330
Référence CVE CVE-2022-0435
https://www.cve.org/CVERecord?id=CVE-2022-0435
Référence CVE CVE-2022-0492
https://www.cve.org/CVERecord?id=CVE-2022-0492
Référence CVE CVE-2022-0516
https://www.cve.org/CVERecord?id=CVE-2022-0516
Référence CVE CVE-2022-0742
https://www.cve.org/CVERecord?id=CVE-2022-0742
Référence CVE CVE-2022-0847
https://www.cve.org/CVERecord?id=CVE-2022-0847
Référence CVE CVE-2022-1055
https://www.cve.org/CVERecord?id=CVE-2022-1055
Référence CVE CVE-2022-22942
https://www.cve.org/CVERecord?id=CVE-2022-22942
Référence CVE CVE-2022-23222
https://www.cve.org/CVERecord?id=CVE-2022-23222
Référence CVE CVE-2022-23960
https://www.cve.org/CVERecord?id=CVE-2022-23960
Référence CVE CVE-2022-25636
https://www.cve.org/CVERecord?id=CVE-2022-25636
Référence CVE CVE-2022-27666
https://www.cve.org/CVERecord?id=CVE-2022-27666
Gestion détaillée du document
le 01 avril 2022
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sécurité des s
Official advisory ↗CERT-FR · French · CERTFR-2022-AVI-265Multiples vulnérabilités dans le noyau Linux de Ubuntu
org/CVERecord?id=CVE-2021-45469
Référence CVE CVE-2021-45480
https://www.cve.org/CVERecord?id=CVE-2021-45480
Référence CVE CVE-2021-45485
https://www.cve.org/CVERecord?id=CVE-2021-45485
Référence CVE CVE-2022-0264
https://www.cve.org/CVERecord?id=CVE-2022-0264
Référence CVE CVE-2022-0382
https://www.cve.org/CVERecord?id=CVE-2022-0382
Référence CVE CVE-2022-0435
https://www.cve.org/CVERecord?id=CVE-2022-0435
Référence CVE CVE-2022-0492
https://www.cve.org/CVERecord?id=CVE-2022-0492
Référence CVE CVE-2022-0516
https://www.cve.org/CVERecord?id=CVE-2022-0516
Référence CVE CVE-2022-0742
https://www.cve.org/CVERecord?id=CVE-2022-0742
Référence CVE CVE-2022-23222
https://www.cve.org/CVERecord?id=CVE-2022-23222
Gestion détaillée du document
le 23 mars 2022
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cyber.gouv.fr
service-public.fr
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info.gouv.fr
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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
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ERecord?id=CVE-2021-44733
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https://www.cve.org/CVERecord?id=CVE-2021-45095
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https://www.cve.org/CVERecord?id=CVE-2021-45480
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https://www.cve.org/CVERecord?id=CVE-2022-0264
Référence CVE CVE-2022-0330
https://www.cve.org/CVERecord?id=CVE-2022-0330
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https://www.cve.org/CVERecord?id=CVE-2022-0382
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https://www.cve.org/CVERecord?id=CVE-2022-21813
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https://www.cve.org/CVERecord?id=CVE-2022-21814
Référence CVE CVE-2022-22942
https://www.cve.org/CVERecord?id=CVE-2022-22942
Référence CVE CVE-2022-23222
https://www.cve.org/CVERecord?id=CVE-2022-23222
Référence CVE CVE-2022-24122
https://www.cve.org/CVERecord?id=CVE-2022-24122
Gestion détaillée du document
le 11 février 2022
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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-071Multiples 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 la confidentialité des données.
Official advisory ↗JVN iPedia · Japanese · JVNDB-2022-003385Linux Kernel における NULL ポインタデリファレンスに関する脆弱性
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.
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.