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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat Hardened Images | — | — |
| Red Hat | Red Hat Enterprise Linux 10 | — | — |
| Red Hat | Red Hat Enterprise Linux 6 | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | rpm | No fix yet | — |
| Debian 13 | rpm | No fix yet | — |
| Debian 12 | rpm | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | rpm | No fix yet | — |
| Ubuntu 26.04 LTS | rpm | No fix yet | — |
| Ubuntu 24.04 LTS | rpm | No fix yet | — |
| Ubuntu 22.04 LTS | rpm | No fix yet | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | rpm | No fix yet | — |
| Ubuntu Pro 18.04 LTS | rpm | No fix yet | — |
| Ubuntu Pro 16.04 LTS | rpm | No fix yet | — |
| Ubuntu Pro 14.04 LTS | rpm | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | rpm +19 | 6.1.0-1.4.hum1 | RHSA-2026:98095 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | rpm +16 | 4.16.1.3-29.amzn2023.0.9 | ALAS2023-2026-3398 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | rpm | No fix yet | — |
Advisories 3
- RHSA-2026:98095 Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- WID-SEC-2026-3676 RPM: Schwachstelle ermöglicht Codeausführung BSI CERT-Bund (WID) · Nov 9, 2026
- ALAS2023-2026-3398 Important: rpm security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Nov 9, 2026
References
- RHSA-2026:98095 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-103242 vdb-entry
- RHBZ#2543866 issue-tracking