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Full vulnerability report · 2026
CVE-2026-54231High confidence

Abrt: unsanitized systemd journal content written to dump directory files enables content injection

Red Hat · Red Hat Enterprise Linux 8

Official source article: Red Hat RHSA-2026:54272 ↗. Check the applicable product and release in the original source.

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
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityMediumOperational priority:Low, lowered one band.downgradedsince 21 Sep 2026

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • Exploitation requires an existing local or physical foothold with privileges.
  • EPSS is 0.19% 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.
  • Monitor vendor guidance and exploitation sources for a material change.

Verification

  1. Confirm that the asset runs Red Hat Red Hat Enterprise Linux 8 and falls inside the recorded affected range.
  2. Verify the installed build against the product-specific fixed version after deployment.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: No default targetRemediation target: Normal maintenance

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

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-2026-54231 · CSAF 2.0 · revision 3 · finalRed Hat Product Securityabrt: unsanitized systemd journal content written to dump directory files enables content injection
36 known affected

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

  • abrt as a component of Red Hat Enterprise Linux 6
  • abrt-addon-ccpp as a component of Red Hat Enterprise Linux 6
  • abrt-addon-kerneloops as a component of Red Hat Enterprise Linux 6
  • abrt-addon-python as a component of Red Hat Enterprise Linux 6
  • abrt-addon-vmcore as a component of Red Hat Enterprise Linux 6
  • abrt-cli as a component of Red Hat Enterprise Linux 6
  • abrt-console-notification as a component of Red Hat Enterprise Linux 6
  • abrt-desktop as a component of Red Hat Enterprise Linux 6
  • abrt-devel as a component of Red Hat Enterprise Linux 6
  • abrt-gui as a component of Red Hat Enterprise Linux 6
  • abrt-libs as a component of Red Hat Enterprise Linux 6
  • abrt-python as a component of Red Hat Enterprise Linux 6
Summary
A content injection vulnerability was found in the ABRT post-create event handler scripts in libreport. The event script queries the systemd journal for log entries matching the crashed process and writes the results to files in the dump directory without sanitizing embedded control characters. A local user can inject arbitrary content into the journal output by embedding newline characters in syslog messages, controlling the content that root writes to dump directory files.
Remediation
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
Optional official sources

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-2026-36640

No EUVD known-exploited evidence

A content injection vulnerability was found in the ABRT post-create event handler scripts in libreport. The event script queries the systemd journal for log entries matching the crashed process and writes the results to files in the dump directory without sanitizing embedded control characters. A local user can inject arbitrary content into the journal output by embedding newline characters in syslog messages, controlling the content that root writes to dump directory files.

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
5.5 · CVSS 3.1
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

A content injection vulnerability was found in the ABRT post-create event handler scripts in libreport. The event script queries the systemd journal for log entries matching the crashed process and writes the results to files in the dump directory without sanitizing embedded control characters. A local user can inject arbitrary content into the journal output by embedding newline characters in syslog messages, controlling the content that root writes to dump directory files.

What

A content injection vulnerability was found in the ABRT post-create event handler scripts in libreport. The event script queries the systemd journal for log entries matching the crashed process and writes the results to files in the dump directory without sanitizing embedded control characters. A local user can inject arbitrary content into the journal output by embedding newline characters in syslog messages, controlling the content that root writes to dump directory files.

Why

The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may disrupt the affected service.

What

A content injection vulnerability was found in the ABRT post-create event handler scripts in libreport. The event script queries the systemd journal for log entries matching the crashed process and writes the results to files in the dump directory without sanitizing embedded control characters. A local user can inject arbitrary content into the journal output by embedding newline characters in syslog messages, controlling the content that root writes to dump directory files.

Why

The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may disrupt the affected service.

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 → Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') → disrupt the affected service
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-74 ↗

CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection'). The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.

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:H/A:N

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.IHighIntegrity impact: A successful attack can cause a major loss.ANoneAvailability impact: No direct loss is represented by this metric.
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.
Denial of serviceCWE-74
A

Official authority intelligence

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

ENISA EUVD · EUVD-2026-36640Official EUVD mapping

A content injection vulnerability was found in the ABRT post-create event handler scripts in libreport. The event script queries the systemd journal for log entries matching the crashed process and writes the results to files in the dump directory without sanitizing embedded control characters. A local user can inject arbitrary content into the journal output by embedding newline characters in syslog messages, controlling the content that root writes to dump directory files.

Official EUVD record ↗
BSI · German · WID-SEC-2026-3470Red Hat Enterprise Linux (abrt): Mehrere Schwachstellen ermöglichen Manipulation von Dateien

Ein lokaler Angreifer kann mehrere Schwachstellen in Red Hat Enterprise Linux ausnutzen, um Dateien zu manipulieren.

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2026-021526Abrt project等の複数ベンダの製品におけるインジェクションに関する脆弱性

libreportのABRTポスト作成イベントハンドラースクリプトにコンテンツインジェクションの脆弱性が発見されました。このイベントスクリプトは、クラッシュしたプロセスに一致するログエントリをsystemdジャーナルから照会し、埋め込み制御文字をサニタイズせずにダンプディレクトリ内のファイルに結果を書き込みます。ローカルユーザーはsyslogメッセージに改行文字を埋め込むことでジャーナル出力に任意のコンテンツを注入でき、その結果ルートがダンプディレクトリのファイルに書き込む内容を制御できます。

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
Fixed
Action
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 13 Jun 2026 · Last source change 21 Sept 2026, 05:48 UTC · CWE-74 · Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

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-2026-36640
Product sourceVendor CSAF · Red Hat Product Security
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCNA
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 ↗
  1. Vendor guidanceAuthoritative vendor guidance changed: added remediation: access.redhat.com/RHSA-2026:54272; removed remediation: access.redhat.com/RHSA-2026:69116; removed vendor advisory: access.redhat.com/RHSA-2026:69116.
    Before
    remediation: access.redhat.com/RHSA-2026:69116 · vendor advisory: access.redhat.com/CVE-2026-54231 · vendor advisory: access.redhat.com/RHSA-2026:69116 · 1 more references
    After
    remediation: access.redhat.com/RHSA-2026:54272 · vendor advisory: access.redhat.com/CVE-2026-54231 · vendor advisory: bugzilla.redhat.com/show_bug.cgi?id=2488571
    secalert@redhat.com ↗
  2. Vendor guidanceAuthoritative vendor guidance changed: added remediation: access.redhat.com/RHSA-2026:69116; added vendor advisory: access.redhat.com/RHSA-2026:69116; removed remediation: access.redhat.com/RHSA-2026:54272.
    Before
    remediation: access.redhat.com/RHSA-2026:54272 · vendor advisory: access.redhat.com/CVE-2026-54231 · vendor advisory: bugzilla.redhat.com/show_bug.cgi?id=2488571
    After
    remediation: access.redhat.com/RHSA-2026:69116 · vendor advisory: access.redhat.com/CVE-2026-54231 · vendor advisory: access.redhat.com/RHSA-2026:69116 · 1 more references
    access.redhat.com ↗
  3. Affected versionsThe structured affected or fixed version information changed.
    Before
    See the vendor and CVE records for the affected range. · Fixed: Red Hat Enterprise Linux 8: 0:2.10.9-26.el8_10 < *; Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support: 0:2.10.9-25.el8_6.2 < *; Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On: 0:2.10.9-25.el8_6.2 < *; Red Hat Enterprise Linux 8.8 Telecommunications Update Service: 0:2.10.9-25.el8_8.2 < *; Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions: 0:2.10.9-25.el8_8.2 < *
    After
    See the vendor and CVE records for the affected range. · Fixed: Red Hat Enterprise Linux 8: 0:2.10.9-26.el8_10 < *; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support: 0:2.10.9-25.el8_4.2 < *; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On: 0:2.10.9-25.el8_4.2 < *; Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support: 0:2.10.9-25.el8_6.2 < *; Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On: 0:2.10.9-25.el8_6.2 < *; Red Hat Enterprise Linux 8.8 Telecommunications Update Service: 0:2.10.9-25.el8_8.2 < *; Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions: 0:2.10.9-25.el8_8.2 < *
    CNA ↗
  4. Affected versionsThe structured affected or fixed version information changed.
    Before
    See the vendor and CVE records for the affected range. · Fixed: Red Hat Enterprise Linux 8: 0:2.10.9-26.el8_10 < *
    After
    See the vendor and CVE records for the affected range. · Fixed: Red Hat Enterprise Linux 8: 0:2.10.9-26.el8_10 < *; Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support: 0:2.10.9-25.el8_6.2 < *; Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On: 0:2.10.9-25.el8_6.2 < *; Red Hat Enterprise Linux 8.8 Telecommunications Update Service: 0:2.10.9-25.el8_8.2 < *; Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions: 0:2.10.9-25.el8_8.2 < *
    CNA ↗
  5. Affected versionsThe structured affected or fixed version information changed.
    Before
    See the vendor and CVE records for the affected range. · Fixed: 0:2.10.9-26.el8_10 < *
    After
    See the vendor and CVE records for the affected range. · Fixed: Red Hat Enterprise Linux 8: 0:2.10.9-26.el8_10 < *
    CNA ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2026-36640↗Vendor advisory↗Vendor advisory↗CVE authority or vendor reference · Red Hat RHSA-2026:54272↗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.
Free version - for non-commercial use only.CVE-2026-54231 · cve.blacktree.nl