Description
Capstone is a disassembly framework. In versions 6.0.0-Alpha5 and prior, Skipdata length is not bounds-checked, so a user-provided skipdata callback can make cs_disasm/cs_disasm_iter memcpy more than 24 bytes into cs_insn.bytes, causing a heap buffer overflow in the disassembly path. Commit cbef767ab33b82166d263895f24084b75b316df3 fixes the issue.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| capstone-engine | capstone | <= 6.0.0-Alpha5 | — |
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 | capstone | 5.0.7-1 | — |
| Debian 13 | capstone | 5.0.7-1~deb13u1 | — |
| Debian 12 | capstone | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | capstone | No fix yet | — |
| Ubuntu 26.04 LTS | capstone | No fix yet | — |
| Ubuntu 25.10 | capstone | No fix yet | — |
| Ubuntu 24.04 LTS | capstone | No fix yet | — |
| Ubuntu 22.04 LTS | capstone | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | capstone | No fix yet | — |
| Ubuntu 18.04 LTS | capstone | No fix yet | — |
| Ubuntu 16.04 LTS | capstone | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | capstone +3 | 5.0.1-7.el10_1 | RHSA-2026:6817 |
| RHEL 9 | capstone +3 | 4.0.2-11.el9_7 | RHSA-2026:4898 |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.0 EUS | capstone +3 | 5.0.1-7.el10_0 | RHSA-2026:5224 |
| RHEL 9.6 EUS | capstone +3 | 4.0.2-11.el9_6 | RHSA-2026:5124 |
| RHEL 9.4 EUS | capstone +3 | 4.0.2-11.el9_4 | RHSA-2026:5125 |
| RHEL 9.2 E4S | capstone | 4.0.2-11.el9_2 | RHSA-2026:5123 |
| RHEL 9.0 E4S | capstone | 4.0.2-5.el9_0 | RHSA-2026:13923 |
| Red Hat Hardened Images 1 | capstone +4 | 5.0.7-0.1.hum1 | RHSA-2026:12781 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | capstone-java +1 | 5.0.1-7.el10_1 | ALSA-2026:6817 |
| AlmaLinux 9 | capstone +3 | 4.0.2-11.el9_7 | ALSA-2026:4898 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | capstone | 5.0.1-7.el10_1 | RLSA-2026:6817 |
| Rocky Linux 9 | capstone | 4.0.2-11.el9_7 | RLSA-2026:4898 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | capstone | 4.0.2-150500.3.3.1 | SUSE-SU-2026:0060-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLE Micro 6.1 | capstone | 4.0.2-slfo.1.1_2.1 | SUSE-SU-2026:20054-1 |
| SLE Micro 6.0 | capstone | 4.0.2-6.1 | SUSE-SU-2026:20868-1 |
| SLE Micro 5.5 | capstone | 4.0.2-150500.3.3.1 | SUSE-SU-2026:0060-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.6 | capstone | 4.0.2-150500.3.3.1 | SUSE-SU-2026:0060-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | capstone | 5.0.7-r0 | — |
| Alpine v3.23 | capstone | 5.0.7-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | capstone +3 | 4.0.2-9.amzn2023.0.4 | ALAS2023-2026-1372 |
| Amazon Linux 2 | capstone +3 | 3.0.5-1.amzn2.0.1 | ALAS2-2026-3133 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | capstone | No fix yet | — |
| Azure Linux 3 | rust | 1.90.0-4 | — |
| Azure Linux 2 (CBL-Mariner) | capstone | No fix yet | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | capstone +3 | 5.0.1-7.el10_1 | ELSA-2026-6817 |
| Oracle Linux 9 | capstone +3 | 4.0.2-11.el9_7 | ELSA-2026-4898 |
Advisories 20
- ALSA-2026:4898 Important: capstone security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:6817 Important: capstone security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2026:12781 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 6, 2026
- RHSA-2026:6817 Red Hat Security Advisory: capstone security update Red Hat Security Advisories (RHSA) · Aug 22, 2026
- RHSA-2026:5224 Red Hat Security Advisory: capstone security update Red Hat Security Advisories (RHSA) · Aug 22, 2026
- RHSA-2026:5124 Red Hat Security Advisory: capstone security update Red Hat Security Advisories (RHSA) · Aug 22, 2026
- RHSA-2026:5125 Red Hat Security Advisory: capstone security update Red Hat Security Advisories (RHSA) · Aug 22, 2026
- RHSA-2026:5123 Red Hat Security Advisory: capstone security update Red Hat Security Advisories (RHSA) · Aug 22, 2026
- RHSA-2026:4898 Red Hat Security Advisory: capstone security update Red Hat Security Advisories (RHSA) · Aug 22, 2026
- RHSA-2026:13923 Red Hat Security Advisory: capstone security update Red Hat Security Advisories (RHSA) · Aug 22, 2026
- WID-SEC-2026-0769 Red Hat Enterprise Linux (capstone) und OpenShift (rhcos): Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 15, 2026
- RLSA-2026:6817 Important: capstone security update Rocky Linux Security Advisories · Apr 9, 2026
- ELSA-2026-6817 Important: capstone security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Apr 8, 2026
- SUSE-SU-2026:20868-1 Security update for capstone SUSE / openSUSE Security Updates · Mar 28, 2026
- RLSA-2026:4898 Important: capstone security update Rocky Linux Security Advisories · Mar 26, 2026
- SUSE-SU-2026:20054-1 Security update for capstone SUSE / openSUSE Security Updates · Mar 23, 2026
- ELSA-2026-4898 Moderate: capstone security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Mar 18, 2026
- ALAS2-2026-3133 Moderate: capstone security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Feb 5, 2026
- ALAS2023-2026-1372 Moderate: capstone security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Feb 5, 2026
- SUSE-SU-2026:0060-1 Security update for capstone SUSE / openSUSE Security Updates · Feb 4, 2026