Evidence used
- No CISA KEV confirmation is currently recorded.
- EPSS is 0.12% for the current model date.
BlackTreeCVE IntelligenceFull vulnerability report · 2026
CVE-2026-103242High confidence
Rpm: heap-based buffer overflow write in hex2binv() via a mistyped rpmtag_filesignatures header tag
Red Hat · Red Hat Enterprise Linux 10
7.1HighCVSS 3.1
Within 7 days
Fix not verifiedHigh technical severity; prioritise exposed affected systems while verifying vendor guidance.
R
Open reassessment dashboard →Operational reassessment
Published severity in operational context
Published severityHigh→Operational priority:High, unchanged from published severity.unchanged
Compensating controls
- Restrict local access and enforce least privilege on affected hosts.
- Monitor vendor guidance and exploitation sources for a material change.
Verification
- Confirm that the asset runs Red Hat Red Hat Enterprise Linux 10 and falls inside the recorded affected range.
- Recheck the vendor advisory before scheduling a change because no verified fixed version is currently retained.
- Validate exposure, authentication requirements and compensating controls in the actual environment.
- Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Distribution package intelligence
5 package statesRelease-specific package status
Debian, ubuntu findings are scoped to the named distribution, release and source package. An absent finding does not mean a package is unaffected.
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.
| Distribution release | Source package | Vendor state | Fixed version | Evidence |
|---|---|---|---|---|
| Debian trixietrixie · source | rpm | Affected, no fix publishedDebian currently tracks this release as open. | Not published in this feed | Debian Security Tracker ↗Source updated 8 Oct 2026 |
| Debian bookwormbookworm · source | rpm | Affected, no fix publishedDebian currently tracks this release as open. | Not published in this feed | Debian Security Tracker ↗Source updated 8 Oct 2026 |
| Debian forkyforky · source | rpm | Affected, no fix publishedDebian currently tracks this release as open. | Not published in this feed | Debian Security Tracker ↗Source updated 8 Oct 2026 |
| Debian sidsid · source | rpm | Affected, no fix publishedDebian currently tracks this release as open. | Not published in this feed | Debian Security Tracker ↗Source updated 8 Oct 2026 |
| Ubuntu 24.04 LTSnoble · standard archive | rpm | Under evaluationCanonical reports that the package might be affected and still needs evaluation or fixing. | Not published in this feed | Canonical Ubuntu Security ↗Source updated 7 Oct 2026 |
Direct vendor intelligence
2 currentAuthoritative 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.
CVE-2026-103242 · CSAF 2.0 · revision 2 · interimSUSE Product Security TeamCVE-2026-103242
The vendor explicitly identifies these products as affected by this CVE.
- librpmbuild10 as component of SUSE Linux Enterprise Server 16.0
- rpm as component of SUSE Linux Enterprise Server 16.0
- rpm-build as component of SUSE Linux Enterprise Server 16.0
- rpm-devel as component of SUSE Linux Enterprise Server 16.0
- rpm-plugin-fapolicyd as component of SUSE Linux Enterprise Server 16.0
- rpm-plugin-ima as component of SUSE Linux Enterprise Server 16.0
- rpm-plugin-prioreset as component of SUSE Linux Enterprise Server 16.0
- rpm-plugin-selinux as component of SUSE Linux Enterprise Server 16.0
- rpm-plugin-syslog as component of SUSE Linux Enterprise Server 16.0
- rpm-plugin-unshare as component of SUSE Linux Enterprise Server 16.0
- librpmbuild10 as component of SUSE Linux Enterprise Server 16.1
- rpm as component of SUSE Linux Enterprise Server 16.1
- Summary
- 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.
- Remediation
- No remediation text is recorded.
CVE-2026-103242 · CSAF 2.0 · revision 3 · finalRed Hat Product Securityrpm: Heap-based buffer overflow write in hex2binv() via a mistyped RPMTAG_FILESIGNATURES header tag
The vendor explicitly identifies these products as affected by this CVE.
- python3-rpm as a component of Red Hat Enterprise Linux 10
- rpm-apidocs as a component of Red Hat Enterprise Linux 10
- rpm-build as a component of Red Hat Enterprise Linux 10
- rpm-build-libs as a component of Red Hat Enterprise Linux 10
- rpm-cron as a component of Red Hat Enterprise Linux 10
- rpm-devel as a component of Red Hat Enterprise Linux 10
- rpm-libs as a component of Red Hat Enterprise Linux 10
- rpm-plugin-audit as a component of Red Hat Enterprise Linux 10
- rpm-plugin-dbus-announce as a component of Red Hat Enterprise Linux 10
- rpm-plugin-fapolicyd as a component of Red Hat Enterprise Linux 10
- rpm-plugin-ima as a component of Red Hat Enterprise Linux 10
- rpm-plugin-selinux as a component of Red Hat Enterprise Linux 10
- Summary
- 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.
- Remediation
- 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.
High technical severity; prioritise exposed affected systems while verifying vendor guidance.
Fix not verified01
What, why and how
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.
What
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.
Why
A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
How
An attacker operating through local access may attempt exploitation without authentication after a user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.
What
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.
Why
A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
How
An attacker operating through local access may attempt exploitation without authentication after a user interaction. 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 No confirmed evidence
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.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 None recorded
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.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 → Heap-based Buffer Overflow → cause the confidentiality, integrity or availability impact described by the vendor
- Attack surface
- Local
- Privileges required
- None: unauthenticated exploitation is possible
- User interaction
- Required interaction required
- 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-122 ↗
CWE-122: Heap-based Buffer Overflow. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
- 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:N/UI:R/S:U/C:N/I:H/A:HCommon 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.PRNonePrivileges required: The attacker does not need an account or existing privileges.UIRequiredUser interaction: Another user must perform an action for exploitation to succeed.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.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.
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. - Fix not verified
- Affected
- librpmbuild10 as component of SUSE Linux Enterprise Server 16.0
- rpm as component of SUSE Linux Enterprise Server 16.0
- rpm-build as component of SUSE Linux Enterprise Server 16.0
- rpm-devel as component of SUSE Linux Enterprise Server 16.0
- rpm-plugin-fapolicyd as component of SUSE Linux Enterprise Server 16.0
- rpm-plugin-ima as component of SUSE Linux Enterprise Server 16.0
- rpm-plugin-prioreset as component of SUSE Linux Enterprise Server 16.0
- rpm-plugin-selinux as component of SUSE Linux Enterprise Server 16.0
- rpm-plugin-syslog as component of SUSE Linux Enterprise Server 16.0
- rpm-plugin-unshare as component of SUSE Linux Enterprise Server 16.0
- librpmbuild10 as component of SUSE Linux Enterprise Server 16.1
- rpm as component of SUSE Linux Enterprise Server 16.1
- rpm-build as component of SUSE Linux Enterprise Server 16.1
- rpm-devel as component of SUSE Linux Enterprise Server 16.1
- librpmbuild10 as component of SUSE Linux Enterprise Server for SAP applications 16.0
- rpm as component of SUSE Linux Enterprise Server for SAP applications 16.0
- rpm-build as component of SUSE Linux Enterprise Server for SAP applications 16.0
- rpm-devel as component of SUSE Linux Enterprise Server for SAP applications 16.0
- librpmbuild10 as component of SUSE Linux Enterprise Server for SAP applications 16.1
- rpm as component of SUSE Linux Enterprise Server for SAP applications 16.1
- rpm-build as component of SUSE Linux Enterprise Server for SAP applications 16.1
- rpm-devel as component of SUSE Linux Enterprise Server for SAP applications 16.1
- librpmbuild9 as component of SUSE Linux Micro 6.0
- rpm as component of SUSE Linux Micro 6.0
- librpmbuild9 as component of SUSE Linux Micro 6.1
- rpm as component of SUSE Linux Micro 6.1
- librpmbuild10 as component of SUSE Linux Micro 6.2
- rpm as component of SUSE Linux Micro 6.2
- rpm as component of SUSE Linux Micro Extras 6.0
- rpm-build as component of SUSE Linux Micro Extras 6.0
- and 6 more
- Fixed
- No fixed version is explicitly recorded in the structured CVE data.
- Action
- No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
- Workaround
- No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04
Evidence and provenance
Published 30 Sept 2026 · Last source change 30 Sept 2026, 16:37 UTC · CWE-122 · Heap-based Buffer Overflow
CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source FIRST · tracked since 2026-10-01
?
The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.European sourceENISA EUVD · EUVD-2026-89790
Product sourceVendor CSAF · SUSE Product Security Team
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCNA
NVD statusNVD awaiting enrichment
Core structured fields are present and their contributing authorities are shown above.
Material change intelligence
View recent updates ↗What changed after publication
- ENISA EUVD mappingEUVD-2026-89790 was added to the official ENISA EUVD mapping for this CVE.ENISA EUVD ↗
- Before
- not recorded
- After
- {"euvdId":"EUVD-2026-89790"}
- Catalogue recordCVE added to the BlackTree catalogue.CNA ↗
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.