BlackTreeIndependent security intelligence
← Back to the CVE catalogue
Full vulnerability report · 2024
CVE-2024-43845High confidence

udf: Fix bogus checksum computation in udf_rename()

Linux · Linux

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.

14 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.

Ubuntu releaseSource packageVendor stateFixed versionEvidence
Ubuntu 24.04 LTSnoble · standard archivelinuxAffected, 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 9 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-awsAffected, 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 9 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-azureAffected, 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 9 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-gcpAffected, 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 9 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-gkeAffected, 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 9 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-gkeopAffected, 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 9 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-ibmAffected, 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 9 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-lowlatencyAffected, 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 9 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-nvidiaAffected, 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 9 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-nvidia-lowlatencyAffected, 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 9 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-oem-6.8Affected, 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 9 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-oracleAffected, 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 9 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-raspiAffected, 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 9 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-riscvAffected, 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 9 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-2024-40495

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

In the Linux kernel, the following vulnerability has been resolved: udf: Fix bogus checksum computation in udf_rename() Syzbot reports uninitialized memory access in udf_rename() when updating checksum of '..' directory entry of a moved directory. This is indeed true as we pass on-stack diriter.fi to the udf_update_tag() and because that has only struct fileIdentDesc included in it and not the impUse or name fields, the checksumming function is going to checksum random stack contents beyond the end of the structure. This is actually harmless because the following udf_fiiter_write_fi() will recompute the checksum from on-disk buffers where everything is properly included. So all that is needed is just removing the bogus calculation.

What

In the Linux kernel, the following vulnerability has been resolved: udf: Fix bogus checksum computation in udf_rename() Syzbot reports uninitialized memory access in udf_rename() when updating checksum of '..' directory entry of a moved directory. This is indeed true as we pass on-stack diriter.fi to the udf_update_tag() and because that has only struct fileIdentDesc included in it and not the impUse or name fields, the checksumming function is going to checksum random stack contents beyond the end of the structure. This is actually harmless because the following udf_fiiter_write_fi() will recompute the checksum from on-disk buffers where everything is properly included. So all that is needed is just removing the bogus calculation.

Why

The product uses or accesses a resource that has not been initialized.

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

In the Linux kernel, the following vulnerability has been resolved: udf: Fix bogus checksum computation in udf_rename() Syzbot reports uninitialized memory access in udf_rename() when updating checksum of '..' directory entry of a moved directory. This is indeed true as we pass on-stack diriter.fi to the udf_update_tag() and because that has only struct fileIdentDesc included in it and not the impUse or name fields, the checksumming function is going to checksum random stack contents beyond the end of the structure. This is actually harmless because the following udf_fiiter_write_fi() will recompute the checksum from on-disk buffers where everything is properly included. So all that is needed is just removing the bogus calculation.

Why

The product uses or accesses a resource that has not been initialized.

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 of Uninitialized Resource → 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-908

CWE-908: Use of Uninitialized Resource. The product uses or accesses a resource that has not been initialized.

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-908
A

Official authority intelligence

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

BSI · German · WID-SEC-W-2024-1875Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service

Ein lokaler Angreifer kann mehrere Schwachstellen in Linux Kernel ausnutzen, um einen Denial of Service Angriff durchzuführen oder unbekannte Auswirkungen zu erzielen.

Official advisory
CERT-FR · French · CERTFR-2025-AVI-0022Multiples vulnérabilités dans le noyau Linux d'Ubuntu

d?id=CVE-2024-43833 Référence CVE CVE-2024-43834 https://www.cve.org/CVERecord?id=CVE-2024-43834 Référence CVE CVE-2024-43835 https://www.cve.org/CVERecord?id=CVE-2024-43835 Référence CVE CVE-2024-43837 https://www.cve.org/CVERecord?id=CVE-2024-43837 Référence CVE CVE-2024-43839 https://www.cve.org/CVERecord?id=CVE-2024-43839 Référence CVE CVE-2024-43840 https://www.cve.org/CVERecord?id=CVE-2024-43840 Référence CVE CVE-2024-43841 https://www.cve.org/CVERecord?id=CVE-2024-43841 Référence CVE CVE-2024-43842 https://www.cve.org/CVERecord?id=CVE-2024-43842 Référence CVE CVE-2024-43843 https://www.cve.org/CVERecord?id=CVE-2024-43843 Référence CVE CVE-2024-43845 https://www.cve.org/CVERecord?id=CVE-2024-43845 Référence CVE CVE-2024-43846 https://www.cve.org/CVERecord?id=CVE-2024-43846 Référence CVE CVE-2024-43847 https://www.cve.org/CVERecord?id=CVE-2024-43847 Référence CVE CVE-2024-43849 https://www.cve.org/CVERecord?id=CVE-2024-43849 Référence CVE CVE-2024-43850 https://www.cve.org/CVERecord?id=CVE-2024-43850 Référence CVE CVE-2024-43852 https://www.cve.org/CVERecord?id=CVE-2024-43852 Référence CVE CVE-2024-43853 https://www.cve.org/CVERecord?id=CVE-2024-43853 Référence CVE CVE-2024-43854 https://www.cve.org/CVERecord?id=CVE-2024-43854 Référence CVE CVE-2024-43856 https://www.cve.org/CVERecord?id=

Official advisory
CERT-FR · French · CERTFR-2024-AVI-1080Multiples vulnérabilités dans le noyau Linux d'Ubuntu

d?id=CVE-2024-43833 Référence CVE CVE-2024-43834 https://www.cve.org/CVERecord?id=CVE-2024-43834 Référence CVE CVE-2024-43835 https://www.cve.org/CVERecord?id=CVE-2024-43835 Référence CVE CVE-2024-43837 https://www.cve.org/CVERecord?id=CVE-2024-43837 Référence CVE CVE-2024-43839 https://www.cve.org/CVERecord?id=CVE-2024-43839 Référence CVE CVE-2024-43840 https://www.cve.org/CVERecord?id=CVE-2024-43840 Référence CVE CVE-2024-43841 https://www.cve.org/CVERecord?id=CVE-2024-43841 Référence CVE CVE-2024-43842 https://www.cve.org/CVERecord?id=CVE-2024-43842 Référence CVE CVE-2024-43843 https://www.cve.org/CVERecord?id=CVE-2024-43843 Référence CVE CVE-2024-43845 https://www.cve.org/CVERecord?id=CVE-2024-43845 Référence CVE CVE-2024-43846 https://www.cve.org/CVERecord?id=CVE-2024-43846 Référence CVE CVE-2024-43847 https://www.cve.org/CVERecord?id=CVE-2024-43847 Référence CVE CVE-2024-43849 https://www.cve.org/CVERecord?id=CVE-2024-43849 Référence CVE CVE-2024-43850 https://www.cve.org/CVERecord?id=CVE-2024-43850 Référence CVE CVE-2024-43852 https://www.cve.org/CVERecord?id=CVE-2024-43852 Référence CVE CVE-2024-43853 https://www.cve.org/CVERecord?id=CVE-2024-43853 Référence CVE CVE-2024-43854 https://www.cve.org/CVERecord?id=CVE-2024-43854 Référence CVE CVE-2024-43855 https://www.cve.org/CVERecord?id=

Official advisory
CERT-FR · French · CERTFR-2024-AVI-0870Multiples vulnérabilités dans le noyau Linux de SUSE

d?id=CVE-2024-42265 Référence CVE CVE-2024-42294 https://www.cve.org/CVERecord?id=CVE-2024-42294 Référence CVE CVE-2024-42301 https://www.cve.org/CVERecord?id=CVE-2024-42301 Référence CVE CVE-2024-42304 https://www.cve.org/CVERecord?id=CVE-2024-42304 Référence CVE CVE-2024-42305 https://www.cve.org/CVERecord?id=CVE-2024-42305 Référence CVE CVE-2024-42306 https://www.cve.org/CVERecord?id=CVE-2024-42306 Référence CVE CVE-2024-43828 https://www.cve.org/CVERecord?id=CVE-2024-43828 Référence CVE CVE-2024-43832 https://www.cve.org/CVERecord?id=CVE-2024-43832 Référence CVE CVE-2024-43835 https://www.cve.org/CVERecord?id=CVE-2024-43835 Référence CVE CVE-2024-43845 https://www.cve.org/CVERecord?id=CVE-2024-43845 Référence CVE CVE-2024-43870 https://www.cve.org/CVERecord?id=CVE-2024-43870 Référence CVE CVE-2024-43884 https://www.cve.org/CVERecord?id=CVE-2024-43884 Référence CVE CVE-2024-43886 https://www.cve.org/CVERecord?id=CVE-2024-43886 Référence CVE CVE-2024-43890 https://www.cve.org/CVERecord?id=CVE-2024-43890 Référence CVE CVE-2024-43898 https://www.cve.org/CVERecord?id=CVE-2024-43898 Référence CVE CVE-2024-43904 https://www.cve.org/CVERecord?id=CVE-2024-43904 Référence CVE CVE-2024-43912 https://www.cve.org/CVERecord?id=CVE-2024-43912 Référence CVE CVE-2024-43914 https://www.cve.org/CVERecord?id=

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
626860c470ff88e5f7f22a282efd1bfe953a1b54 < 9c439311c13fc6faab1921441165c9b8b500c83b; e9109a92d2a95889498bed3719cd2318892171a2 < fe2ead240c31e8d158713beca9d0681a6e6a53ab; e9109a92d2a95889498bed3719cd2318892171a2 < 40d7b3ed52449d36143bab8d3e70926aa61a60f4; e9109a92d2a95889498bed3719cd2318892171a2 < 27ab33854873e6fb958cb074681a0107cc2ecc4c; 6.3
Fixed
< 6.3; 6.6.44 ≤ 6.6.*; 6.10.3 ≤ 6.10.*; 6.11 ≤ *
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 17 Aug 2024 · Last source change 5 Aug 2026, 11:36 UTC · CWE-908 · Use of Uninitialized Resource

CVE recordCVE.org · 5.2
CVSS sourceCNA
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-2024-40495
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-2024-43845 · cve.blacktree.nl