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Full vulnerability report · 2025
CVE-2023-53397High confidence

modpost: fix off by one in is_executable_section()

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.

9 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 archivelinux-azure-6.11Affected, 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 8 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-gcp-6.11Affected, 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 8 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-hwe-6.11Affected, 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 8 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-intelAffected, 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 8 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-lowlatency-hwe-6.11Affected, 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 8 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-oem-6.11Affected, 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 8 Sept 2026
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 8 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-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 8 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 8 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-2025-29955

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
01

What, why and how

In the Linux kernel, the following vulnerability has been resolved: modpost: fix off by one in is_executable_section() The > comparison should be >= to prevent an out of bounds array access.

What

In the Linux kernel, the following vulnerability has been resolved: modpost: fix off by one in is_executable_section() The > comparison should be >= to prevent an out of bounds array access.

Why

A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value.

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: modpost: fix off by one in is_executable_section() The > comparison should be >= to prevent an out of bounds array access.

Why

A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value.

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 → Off-by-one Error → 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-193

CWE-193: Off-by-one Error. A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value.

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-193
A

Official authority intelligence

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

BSI · German · WID-SEC-W-2026-0349Dell Avamar und NetWorker: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Dell Avamar und Dell NetWorker ausnutzen, um Angriffe zu starten, die die Integrität, Vertraulichkeit und Verfügbarkeit von Systemen beeinträchtigen.

Official advisory
BSI · German · WID-SEC-W-2025-2092Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service

Ein Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen, um einen Denial of Service Angriff durchzuführen und um nicht nähere beschriebene Effekte zu verursachen.

Official advisory
CERT-FR · French · CERTFR-2025-AVI-1032Multiples vulnérabilités dans le noyau Linux de SUSE

d?id=CVE-2023-53377 Référence CVE CVE-2023-53379 https://www.cve.org/CVERecord?id=CVE-2023-53379 Référence CVE CVE-2023-53380 https://www.cve.org/CVERecord?id=CVE-2023-53380 Référence CVE CVE-2023-53384 https://www.cve.org/CVERecord?id=CVE-2023-53384 Référence CVE CVE-2023-53385 https://www.cve.org/CVERecord?id=CVE-2023-53385 Référence CVE CVE-2023-53386 https://www.cve.org/CVERecord?id=CVE-2023-53386 Référence CVE CVE-2023-53391 https://www.cve.org/CVERecord?id=CVE-2023-53391 Référence CVE CVE-2023-53394 https://www.cve.org/CVERecord?id=CVE-2023-53394 Référence CVE CVE-2023-53395 https://www.cve.org/CVERecord?id=CVE-2023-53395 Référence CVE CVE-2023-53397 https://www.cve.org/CVERecord?id=CVE-2023-53397 Référence CVE CVE-2023-53401 https://www.cve.org/CVERecord?id=CVE-2023-53401 Référence CVE CVE-2023-53420 https://www.cve.org/CVERecord?id=CVE-2023-53420 Référence CVE CVE-2023-53421 https://www.cve.org/CVERecord?id=CVE-2023-53421 Référence CVE CVE-2023-53424 https://www.cve.org/CVERecord?id=CVE-2023-53424 Référence CVE CVE-2023-53425 https://www.cve.org/CVERecord?id=CVE-2023-53425 Référence CVE CVE-2023-53426 https://www.cve.org/CVERecord?id=CVE-2023-53426 Référence CVE CVE-2023-53428 https://www.cve.org/CVERecord?id=CVE-2023-53428 Référence CVE CVE-2023-53429 https://www.cve.org/CVERecord?id=

Official advisory
CERT-FR · French · CERTFR-2025-AVI-1009Multiples vulnérabilités dans le noyau Linux de SUSE

d?id=CVE-2023-53377 Référence CVE CVE-2023-53379 https://www.cve.org/CVERecord?id=CVE-2023-53379 Référence CVE CVE-2023-53380 https://www.cve.org/CVERecord?id=CVE-2023-53380 Référence CVE CVE-2023-53384 https://www.cve.org/CVERecord?id=CVE-2023-53384 Référence CVE CVE-2023-53385 https://www.cve.org/CVERecord?id=CVE-2023-53385 Référence CVE CVE-2023-53386 https://www.cve.org/CVERecord?id=CVE-2023-53386 Référence CVE CVE-2023-53391 https://www.cve.org/CVERecord?id=CVE-2023-53391 Référence CVE CVE-2023-53394 https://www.cve.org/CVERecord?id=CVE-2023-53394 Référence CVE CVE-2023-53395 https://www.cve.org/CVERecord?id=CVE-2023-53395 Référence CVE CVE-2023-53397 https://www.cve.org/CVERecord?id=CVE-2023-53397 Référence CVE CVE-2023-53401 https://www.cve.org/CVERecord?id=CVE-2023-53401 Référence CVE CVE-2023-53420 https://www.cve.org/CVERecord?id=CVE-2023-53420 Référence CVE CVE-2023-53421 https://www.cve.org/CVERecord?id=CVE-2023-53421 Référence CVE CVE-2023-53424 https://www.cve.org/CVERecord?id=CVE-2023-53424 Référence CVE CVE-2023-53425 https://www.cve.org/CVERecord?id=CVE-2023-53425 Référence CVE CVE-2023-53426 https://www.cve.org/CVERecord?id=CVE-2023-53426 Référence CVE CVE-2023-53428 https://www.cve.org/CVERecord?id=CVE-2023-53428 Référence CVE CVE-2023-53429 https://www.cve.org/CVERecord?id=

Official advisory
CERT-FR · French · CERTFR-2025-AVI-0921Multiples vulnérabilités dans le noyau Linux de SUSE

d?id=CVE-2023-53385 Référence CVE CVE-2023-53386 https://www.cve.org/CVERecord?id=CVE-2023-53386 Référence CVE CVE-2023-53388 https://www.cve.org/CVERecord?id=CVE-2023-53388 Référence CVE CVE-2023-53390 https://www.cve.org/CVERecord?id=CVE-2023-53390 Référence CVE CVE-2023-53391 https://www.cve.org/CVERecord?id=CVE-2023-53391 Référence CVE CVE-2023-53393 https://www.cve.org/CVERecord?id=CVE-2023-53393 Référence CVE CVE-2023-53394 https://www.cve.org/CVERecord?id=CVE-2023-53394 Référence CVE CVE-2023-53395 https://www.cve.org/CVERecord?id=CVE-2023-53395 Référence CVE CVE-2023-53396 https://www.cve.org/CVERecord?id=CVE-2023-53396 Référence CVE CVE-2023-53397 https://www.cve.org/CVERecord?id=CVE-2023-53397 Référence CVE CVE-2023-53400 https://www.cve.org/CVERecord?id=CVE-2023-53400 Référence CVE CVE-2023-53401 https://www.cve.org/CVERecord?id=CVE-2023-53401 Référence CVE CVE-2023-53404 https://www.cve.org/CVERecord?id=CVE-2023-53404 Référence CVE CVE-2023-53405 https://www.cve.org/CVERecord?id=CVE-2023-53405 Référence CVE CVE-2023-53406 https://www.cve.org/CVERecord?id=CVE-2023-53406 Référence CVE CVE-2023-53409 https://www.cve.org/CVERecord?id=CVE-2023-53409 Référence CVE CVE-2023-53413 https://www.cve.org/CVERecord?id=CVE-2023-53413 Référence CVE CVE-2023-53414 https://www.cve.org/CVERecord?id=

Official advisory
CERT-FR · French · CERTFR-2025-AVI-0895Multiples vulnérabilités dans le noyau Linux de SUSE

d?id=CVE-2023-53385 Référence CVE CVE-2023-53386 https://www.cve.org/CVERecord?id=CVE-2023-53386 Référence CVE CVE-2023-53388 https://www.cve.org/CVERecord?id=CVE-2023-53388 Référence CVE CVE-2023-53390 https://www.cve.org/CVERecord?id=CVE-2023-53390 Référence CVE CVE-2023-53391 https://www.cve.org/CVERecord?id=CVE-2023-53391 Référence CVE CVE-2023-53393 https://www.cve.org/CVERecord?id=CVE-2023-53393 Référence CVE CVE-2023-53394 https://www.cve.org/CVERecord?id=CVE-2023-53394 Référence CVE CVE-2023-53395 https://www.cve.org/CVERecord?id=CVE-2023-53395 Référence CVE CVE-2023-53396 https://www.cve.org/CVERecord?id=CVE-2023-53396 Référence CVE CVE-2023-53397 https://www.cve.org/CVERecord?id=CVE-2023-53397 Référence CVE CVE-2023-53398 https://www.cve.org/CVERecord?id=CVE-2023-53398 Référence CVE CVE-2023-53400 https://www.cve.org/CVERecord?id=CVE-2023-53400 Référence CVE CVE-2023-53401 https://www.cve.org/CVERecord?id=CVE-2023-53401 Référence CVE CVE-2023-53404 https://www.cve.org/CVERecord?id=CVE-2023-53404 Référence CVE CVE-2023-53405 https://www.cve.org/CVERecord?id=CVE-2023-53405 Référence CVE CVE-2023-53406 https://www.cve.org/CVERecord?id=CVE-2023-53406 Référence CVE CVE-2023-53409 https://www.cve.org/CVERecord?id=CVE-2023-53409 Référence CVE CVE-2023-53413 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
52dc0595d540155436d91811f929bdc8afd6a2a1 < 7ee557590bac154d324de446d1cd0444988bd511; 52dc0595d540155436d91811f929bdc8afd6a2a1 < 02dc8e8bdbe4412cfcf17ee3873e63fa5a55b957; 52dc0595d540155436d91811f929bdc8afd6a2a1 < cb0cdca5c979bc34c27602e2039562932c2591a4; 52dc0595d540155436d91811f929bdc8afd6a2a1 < 5e0424cd8a44b5f480feb06753cdf4e1f248d148; 52dc0595d540155436d91811f929bdc8afd6a2a1 < dd872d5576cc94528f427c7264c2c438928cc6d2; 52dc0595d540155436d91811f929bdc8afd6a2a1 < cade370efe2f9e2a79ea8587506ffe2b51ac6d2b; 52dc0595d540155436d91811f929bdc8afd6a2a1 < 8b2e77050b91199453bf19d0517b047b7339a9e3; 52dc0595d540155436d91811f929bdc8afd6a2a1 < 3a3f1e573a105328a2cca45a7cfbebabbf5e3192
Fixed
< 4.1; 4.14.322 ≤ 4.14.*; 5.4.251 ≤ 5.4.*; 5.10.188 ≤ 5.10.*; 5.15.121 ≤ 5.15.*; 6.1.39 ≤ 6.1.*; 6.3.13 ≤ 6.3.*; 6.4.4 ≤ 6.4.*
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 18 Sept 2025 · Last source change 11 May 2026, 19:44 UTC · CWE-193 · Off-by-one Error

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-2025-29955
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceCISA ADP
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-2023-53397 · cve.blacktree.nl