BlackTreeIndependent security intelligence

Full vulnerability report · 2024

CVE-2021-47490High confidence

drm/ttm: fix memleak in ttm_transfered_destroy

Linux · Linux

5.5MediumCVSS 3.1

Recommended action

Scheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

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 release	Source package	Vendor state	Fixed version	Evidence
Ubuntu 24.04 LTSnoble · standard archive	`linux-raspi-realtime`	Affected, 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 feed`	Canonical record ↗Source updated 10 Sept 2026

Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current

CVE-2021-47490 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitykernel: drm/ttm: fix memleak in ttm_transfered_destroy

184 known affected

The vendor explicitly identifies these products as affected by this CVE.

bpftool as a component of Red Hat Enterprise Linux 7
kernel as a component of Red Hat Enterprise Linux 7
kernel-abi-whitelists as a component of Red Hat Enterprise Linux 7
kernel-bootwrapper as a component of Red Hat Enterprise Linux 7
kernel-debug as a component of Red Hat Enterprise Linux 7
kernel-debug-devel as a component of Red Hat Enterprise Linux 7
kernel-devel as a component of Red Hat Enterprise Linux 7
kernel-doc as a component of Red Hat Enterprise Linux 7
kernel-headers as a component of Red Hat Enterprise Linux 7
kernel-kdump as a component of Red Hat Enterprise Linux 7
kernel-kdump-devel as a component of Red Hat Enterprise Linux 7
kernel-rt as a component of Red Hat Enterprise Linux 7

Summary: In the Linux kernel, the following vulnerability has been resolved: drm/ttm: fix memleak in ttm_transfered_destroy We need to cleanup the fences for ghost objects as well. Bug: https://bugzilla.kernel.org/show_bug.cgi?id=214029 Bug: https://bugzilla.kernel.org/show_bug.cgi?id=214447
Remediation: Fix deferred

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-2021-34494

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 actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available

What, why and how

In the Linux kernel, the following vulnerability has been resolved: drm/ttm: fix memleak in ttm_transfered_destroy We need to cleanup the fences for ghost objects as well. Bug: https://bugzilla.kernel.org/show_bug.cgi?id=214029 Bug: https://bugzilla.kernel.org/show_bug.cgi?id=214447

What

Why

The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

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

Why

The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

How

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 → Missing Release of Memory after Effective Lifetime → 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-401 ↗
CWE-401: Missing Release of Memory after Effective Lifetime. The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.
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:N/I:N/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.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.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-401

Official authority intelligence

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

ENISA EUVD · EUVD-2021-34494Official EUVD mapping

0 linked advisory records.

Official EUVD record

BSI · German · WID-SEC-W-2024-1197Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service und unspezifische Angriffe

Ein lokaler Angreifer kann mehrere Schwachstellen im Linux-Kernel ausnutzen, um einen Denial-of-Service-Zustand zu erzeugen oder unspezifische Angriffe durchzuführen.

Official advisory

CERT-FR · French · CERTFR-2025-AVI-1057Multiples vulnérabilités dans les produits VMware

d?id=CVE-2021-47429 Référence CVE CVE-2021-47430 https://www.cve.org/CVERecord?id=CVE-2021-47430 Référence CVE CVE-2021-47438 https://www.cve.org/CVERecord?id=CVE-2021-47438 Référence CVE CVE-2021-47444 https://www.cve.org/CVERecord?id=CVE-2021-47444 Référence CVE CVE-2021-47454 https://www.cve.org/CVERecord?id=CVE-2021-47454 Référence CVE CVE-2021-47457 https://www.cve.org/CVERecord?id=CVE-2021-47457 Référence CVE CVE-2021-47465 https://www.cve.org/CVERecord?id=CVE-2021-47465 Référence CVE CVE-2021-47481 https://www.cve.org/CVERecord?id=CVE-2021-47481 Référence CVE CVE-2021-47483 https://www.cve.org/CVERecord?id=CVE-2021-47483 Référence CVE CVE-2021-47490 https://www.cve.org/CVERecord?id=CVE-2021-47490 Référence CVE CVE-2021-47495 https://www.cve.org/CVERecord?id=CVE-2021-47495 Référence CVE CVE-2021-47497 https://www.cve.org/CVERecord?id=CVE-2021-47497 Référence CVE CVE-2021-47499 https://www.cve.org/CVERecord?id=CVE-2021-47499 Référence CVE CVE-2021-47500 https://www.cve.org/CVERecord?id=CVE-2021-47500 Référence CVE CVE-2021-47505 https://www.cve.org/CVERecord?id=CVE-2021-47505 Référence CVE CVE-2021-47516 https://www.cve.org/CVERecord?id=CVE-2021-47516 Référence CVE CVE-2021-47517 https://www.cve.org/CVERecord?id=CVE-2021-47517 Référence CVE CVE-2021-47519 https://www.cve.org/CVERecord?id=

Official advisory

CERT-FR · French · CERTFR-2024-AVI-0526Multiples vulnérabilités dans le noyau Linux de SUSE

d?id=CVE-2021-47480 Référence CVE CVE-2021-47481 https://www.cve.org/CVERecord?id=CVE-2021-47481 Référence CVE CVE-2021-47482 https://www.cve.org/CVERecord?id=CVE-2021-47482 Référence CVE CVE-2021-47483 https://www.cve.org/CVERecord?id=CVE-2021-47483 Référence CVE CVE-2021-47484 https://www.cve.org/CVERecord?id=CVE-2021-47484 Référence CVE CVE-2021-47485 https://www.cve.org/CVERecord?id=CVE-2021-47485 Référence CVE CVE-2021-47486 https://www.cve.org/CVERecord?id=CVE-2021-47486 Référence CVE CVE-2021-47488 https://www.cve.org/CVERecord?id=CVE-2021-47488 Référence CVE CVE-2021-47489 https://www.cve.org/CVERecord?id=CVE-2021-47489 Référence CVE CVE-2021-47490 https://www.cve.org/CVERecord?id=CVE-2021-47490 Référence CVE CVE-2021-47491 https://www.cve.org/CVERecord?id=CVE-2021-47491 Référence CVE CVE-2021-47492 https://www.cve.org/CVERecord?id=CVE-2021-47492 Référence CVE CVE-2021-47493 https://www.cve.org/CVERecord?id=CVE-2021-47493 Référence CVE CVE-2021-47494 https://www.cve.org/CVERecord?id=CVE-2021-47494 Référence CVE CVE-2021-47495 https://www.cve.org/CVERecord?id=CVE-2021-47495 Référence CVE CVE-2021-47496 https://www.cve.org/CVERecord?id=CVE-2021-47496 Référence CVE CVE-2021-47497 https://www.cve.org/CVERecord?id=CVE-2021-47497 Référence CVE CVE-2021-47498 https://www.cve.org/CVERecord?id=

Official advisory

CERT-FR · French · CERTFR-2024-AVI-0496Multiples vulnérabilités dans le noyau Linux de SUSE

Official advisory

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: bpftool as a component of Red Hat Enterprise Linux 7; kernel as a component of Red Hat Enterprise Linux 7; kernel-abi-whitelists as a component of Red Hat Enterprise Linux 7; kernel-bootwrapper as a component of Red Hat Enterprise Linux 7; kernel-debug as a component of Red Hat Enterprise Linux 7; kernel-debug-devel as a component of Red Hat Enterprise Linux 7; kernel-devel as a component of Red Hat Enterprise Linux 7; kernel-doc as a component of Red Hat Enterprise Linux 7; kernel-headers as a component of Red Hat Enterprise Linux 7; kernel-kdump as a component of Red Hat Enterprise Linux 7; kernel-kdump-devel as a component of Red Hat Enterprise Linux 7; kernel-rt as a component of Red Hat Enterprise Linux 7; kernel-rt-debug as a component of Red Hat Enterprise Linux 7; kernel-rt-debug-devel as a component of Red Hat Enterprise Linux 7; kernel-rt-debug-kvm as a component of Red Hat Enterprise Linux 7; kernel-rt-devel as a component of Red Hat Enterprise Linux 7; kernel-rt-doc as a component of Red Hat Enterprise Linux 7; kernel-rt-kvm as a component of Red Hat Enterprise Linux 7; kernel-rt-trace as a component of Red Hat Enterprise Linux 7; kernel-rt-trace-devel as a component of Red Hat Enterprise Linux 7; kernel-rt-trace-kvm as a component of Red Hat Enterprise Linux 7; kernel-rt.src as a component of Red Hat Enterprise Linux 7; kernel-tools as a component of Red Hat Enterprise Linux 7; kernel-tools-libs as a component of Red Hat Enterprise Linux 7; kernel-tools-libs-devel as a component of Red Hat Enterprise Linux 7; kernel.src as a component of Red Hat Enterprise Linux 7; perf as a component of Red Hat Enterprise Linux 7; python-perf as a component of Red Hat Enterprise Linux 7; bpftool as a component of Red Hat Enterprise Linux 8; kernel as a component of Red Hat Enterprise Linux 8; and 154 more
Fixed: < 5.14; 5.14.16 ≤ 5.14.*; 5.15 ≤ *
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.

Evidence and provenance

Published 22 May 2024 · Last source change 11 May 2026, 13:55 UTC · CWE-401 · Missing Release of Memory after Effective Lifetime

CVE recordCVE.org · 5.2

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-2021-34494

Product sourceVendor CSAF · Red Hat Product Security

Remediation sourceVendor CSAF · Red Hat Product Security

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.

2024-05-22CVE published

2026-05-11Fixed release or patch reference recorded

ENISA EUVD · EUVD-2021-34494↗Vendor CSAF · Red Hat Product Security↗CVE authority or vendor reference↗Patch or update reference↗Patch or update reference↗Patch or update reference↗Official CVE record (CNA and ADP data)↗NVD record↗

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.

drm/ttm: fix memleak in ttm_transfered_destroy

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

EUVD-2021-34494

What, why and how

Exploit reality and attack path

Official authority intelligence

Patch and workaround

Evidence and provenance

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