CVE-2026-103242

Rpm: heap-based buffer overflow write in hex2binv() via a mistyped rpmtag_filesignatures header tag

View on CVE.org

Published Sep 30, 2026 CVSS 3.1 · 7.1 High EPSS < 1% KEV · Not listed

Description

A heap-based buffer overflow flaw was found in rpm. RPMTAG_FILESIGNATURES in a crafted, unsigned RPM package's main header is declared with the wrong header type, causing hex2binv() to allocate a one-byte buffer and then write the tag's attacker-controlled, hex-decoded content — of attacker-chosen length — past the end of that allocation. This is reachable via rpm2cpio, rpm2archive, and rpm -qlvp on an untrusted package.

Analysis

Technical impact

A heap‑based buffer overflow occurs in rpm when the RPMTAG_FILESIGNATURES header of a crafted, unsigned RPM is declared with an incorrect header type. The wrong type causes hex2binv() to allocate only a one‑byte buffer and then write the attacker‑controlled, hex‑decoded data of arbitrary length beyond that allocation, leading to memory corruption that could be exploited to hijack execution flow.

Affected Systems

The flaw affects Red Hat Enterprise Linux 10, 6, 7, 8, 9 and Red Hat Hardened Images when they use the vulnerable rpm utility. Any system that processes RPM packages with these operating systems would be impacted.

Risk and Exploitability

The CVSS score of 7.1 indicates a medium severity vulnerability. EPSS is not available and the issue is not listed in the CISA KEV catalogue. The attack vector is reachable locally by exploiting rpm2cpio, rpm2archive or rpm –qlvp against an untrusted or unsigned RPM package, allowing an attacker to trigger the overflow and potentially achieve arbitrary code execution if they can supply a crafted payload.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Red Hat

Red Hat Hardened Images

affected

Version	Status	Constraints
`6.1.0-1.4.hum1`	unaffected	< *

Red Hat Red Hat Enterprise Linux 10 affected —

Red Hat Red Hat Enterprise Linux 6 unaffected —

Red Hat Red Hat Enterprise Linux 7 unaffected —

Red Hat Red Hat Enterprise Linux 8 affected —

Red Hat Red Hat Enterprise Linux 9 affected —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unknown —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unknown —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unknown —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unknown —

Red Hat Red Hat OpenShift AI (RHOAI) unknown —

Red Hat Red Hat OpenShift AI (RHOAI) unknown —

Red Hat Red Hat OpenShift AI (RHOAI) unknown —

Red Hat Red Hat OpenShift AI (RHOAI) unknown —

Red Hat Red Hat OpenShift AI (RHOAI) unknown —

Red Hat Red Hat OpenShift AI (RHOAI) unknown —

Red Hat Red Hat OpenShift AI (RHOAI) unknown —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unknown —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

No data.

No data.

Vendor Product Versions

Red Hat

Enterprise Linux

Version	Status	Scheme	Platform
`—`	affected	—	—

Red Hat

Enterprise Linux

Version	Status	Scheme	Platform
`—`	unaffected	—	—

Redhat

Enterprise Linux

Version	Status	Scheme	Platform
`—`	affected	—	—

Redhat

Enterprise Linux

Version	Status	Scheme	Platform
`—`	unaffected	—	—

Redhat

Hardened Images

Version	Status	Scheme	Platform
`—`	affected	—	—

Rpm

Rpm

Version	Status	Scheme	Platform
`—`	affected	—	—

Remediation

Vendor Workaround

Avoid processing or extracting RPM packages from untrusted or unsigned sources. Do not run rpm -qlvp, rpm2cpio, or rpm2archive against RPM files whose origin and integrity cannot be verified.

OpenCVE Recommended Actions

Avoid using rpm’s rpm2cpio, rpm2archive or rpm –qlvp commands on any untrusted or unsigned RPM files
Verify the integrity and GPG signature of RPM packages before processing them with rpm tools
Apply Red Hat security updates or patches that fix the vulnerable rpm package as soon as they are released

Generated by OpenCVE AI on September 30, 2026 at 13:27 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact High

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.119% probability within 30 days)

Exploitation none

Automatable no

Technical Impact total

References

Link	Providers
https://access.redhat.com/errata/RHSA-2026:98095
https://access.redhat.com/security/cve/CVE-2026-103242
https://bugzilla.redhat.com/show_bug.cgi?id=2543866
https://nvd.nist.gov/vuln/detail/CVE-2026-103242
https://www.cve.org/CVERecord?id=CVE-2026-103242

History

Nov 13, 2026 1:45 PM Added references View changes

Type	Values Removed	Values Added
References		https://access.redhat.com/errata/RHSA-2026:98095

Nov 10, 2026 11:00 PM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Red Hat Red Hat enterprise Linux Redhat hardened Images Rpm Rpm rpm
Vendors & Products		Red Hat Red Hat enterprise Linux Redhat hardened Images Rpm Rpm rpm

Nov 6, 2026 7:45 AM First appearance in the feed. Affected versions updated. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Redhat openshift Ai
CPEs		cpe:/a:redhat:openshift_ai
Vendors & Products		Redhat openshift Ai

Nov 5, 2026 5:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Nov 5, 2026 4:00 PM First appearance in the feed. Affected versions updated. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Redhat rhel Els
CPEs	cpe:/o:redhat:enterprise_linux:10 cpe:/o:redhat:enterprise_linux:6 cpe:/o:redhat:enterprise_linux:7 cpe:/o:redhat:enterprise_linux:8 cpe:/o:redhat:enterprise_linux:9	cpe:/a:redhat:enterprise_linux:10 cpe:/a:redhat:enterprise_linux:8 cpe:/a:redhat:enterprise_linux:9 cpe:/o:redhat:rhel_els:6 cpe:/o:redhat:rhel_els:7
Vendors & Products		Redhat rhel Els

Oct 1, 2026 12:15 AM Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
References		https://nvd.nist.gov/vuln/detail/CVE-2026-103242 https://www.cve.org/CVERecord?id=CVE-2026-103242
Metrics	threat_severity `None`	threat_severity `Moderate`

Sep 30, 2026 12:00 PM Description updated. Title updated. First appearance in the feed. Weaknesses updated. Affected versions updated. Affected vendors updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		A heap-based buffer overflow flaw was found in rpm. RPMTAG_FILESIGNATURES in a crafted, unsigned RPM package's main header is declared with the wrong header type, causing hex2binv() to allocate a one-byte buffer and then write the tag's attacker-controlled, hex-decoded content — of attacker-chosen length — past the end of that allocation. This is reachable via rpm2cpio, rpm2archive, and rpm -qlvp on an untrusted package.
Title		Rpm: heap-based buffer overflow write in hex2binv() via a mistyped rpmtag_filesignatures header tag
First Time appeared		Redhat Redhat enterprise Linux Redhat hummingbird
Weaknesses		CWE-122
CPEs		cpe:/a:redhat:hummingbird:1 cpe:/o:redhat:enterprise_linux:10 cpe:/o:redhat:enterprise_linux:6 cpe:/o:redhat:enterprise_linux:7 cpe:/o:redhat:enterprise_linux:8 cpe:/o:redhat:enterprise_linux:9
Vendors & Products		Redhat Redhat enterprise Linux Redhat hummingbird
References		https://access.redhat.com/security/cve/CVE-2026-103242 https://bugzilla.redhat.com/show_bug.cgi?id=2543866
Metrics		cvssV3_1 `{'score': 7.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H'}`

Earlier changes (2)

Subscriptions

Red Hat Enterprise Linux

Redhat Enterprise Linux Hardened Images Hummingbird Openshift Ai Rhel Els

Rpm Rpm

Weaknesses

CWE-122
Heap-based Buffer Overflow

Sources

CVE record Updated: Nov 13, 2026, 1:33 PM

Status: PUBLISHED
Assigner: redhat
Published: Sep 30, 2026, 11:50 AM
Updated: Nov 13, 2026, 1:33 PM
Reserved: Sep 30, 2026, 10:39 AM

View source JSON

Vulnrichment Updated: Sep 30, 2026, 4:37 PM

Updated: Sep 30, 2026, 4:37 PM

NVD Updated: Nov 6, 2026, 8:17 AM

Status: Awaiting Analysis
Published: Sep 30, 2026, 12:17 PM
Modified: Nov 6, 2026, 8:17 AM

View source JSON

Red Hat Updated: Sep 30, 2026, 11:00 AM

Severity: Moderate
Public date: Sep 30, 2026, 11:00 AM

View source Bugzilla JSON

OpenCVE enrichment Updated: Nov 10, 2026, 10:45 PM

Updated: Nov 10, 2026, 10:45 PM

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"defaultStatus": "unaffected", "packageName": "rhoai/odh-ogx-k8s-operator-rhel9", "product": "Red Hat OpenShift AI (RHOAI)", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:openshift_ai"], "defaultStatus": "unaffected", "packageName": "rhoai/odh-ogx-module-operator-rhel9", "product": "Red Hat OpenShift AI (RHOAI)", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:openshift_ai"], "defaultStatus": "unaffected", "packageName": "rhoai/odh-training-operator-rhel9", "product": "Red Hat OpenShift AI (RHOAI)", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:openshift_ai"], "defaultStatus": "unaffected", "packageName": "rhoai/odh-trustyai-service-operator-rhel9", "product": "Red Hat OpenShift AI (RHOAI)", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:openshift_ai"], "defaultStatus": "unaffected", "packageName": "rhoai/odh-workbenches-operator-rhel9", "product": "Red Hat OpenShift AI (RHOAI)", "vendor": "Red Hat"}], "source": "secalert@redhat.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A heap-based buffer overflow flaw was found in rpm. RPMTAG_FILESIGNATURES in a crafted, unsigned RPM package's main header is declared with the wrong header type, causing hex2binv() to allocate a one-byte buffer and then write the tag's attacker-controlled, hex-decoded content \u2014 of attacker-chosen length \u2014 past the end of that allocation. This is reachable via rpm2cpio, rpm2archive, and rpm -qlvp on an untrusted package."}], "id": "CVE-2026-103242", "lastModified": "2026-11-06T08:17:17.297", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "secalert@redhat.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-103242", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-09-30T16:36:10.336744Z", "version": "2.0.3"}}]}, "published": "2026-09-30T12:17:12.653", "references": [{"source": "secalert@redhat.com", "url": "https://access.redhat.com/security/cve/CVE-2026-103242"}, {"source": "secalert@redhat.com", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2543866"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-122"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

{"acknowledgement": "Red Hat would like to thank Calif.io for reporting this issue.", "bugzilla": {"description": "rpm: Heap-based buffer overflow write in hex2binv() via a mistyped RPMTAG_FILESIGNATURES header tag", "id": "2543866", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2543866"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.1", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H", "status": "draft"}, "cwe": "CWE-122", "details": ["A heap-based buffer overflow flaw was found in rpm. RPMTAG_FILESIGNATURES in a crafted, unsigned RPM package's main header is declared with the wrong header type, causing hex2binv() to allocate a one-byte buffer and then write the tag's attacker-controlled, hex-decoded content \u2014 of attacker-chosen length \u2014 past the end of that allocation. This is reachable via rpm2cpio, rpm2archive, and rpm -qlvp on an untrusted package."], "mitigation": {"lang": "en:us", "value": "Avoid processing or extracting RPM packages from untrusted or unsigned sources. Do not run rpm -qlvp, rpm2cpio, or rpm2archive against RPM files whose origin and integrity cannot be verified."}, "name": "CVE-2026-103242", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "rpm", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "rpm", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "rpm", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "rpm", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "rpm", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "rpm", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-09-30T11:00:35Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-103242\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-103242"], "statement": "This issue is rated Moderate because, while parsing a crafted RPM triggers an attacker-controlled-content, attacker-controlled-length heap write, exploitation is local: a user or automated workflow must choose to run rpm -qlvp, rpm2cpio, or rpm2archive against the untrusted package. The flaw is not exposed as a network service. Testing against the shipped rpm binary demonstrated a reliable crash; no proof-of-concept achieving code execution beyond the crash has been produced.", "threat_severity": "Moderate"}

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