Description
Off-by-one error in the dwarf_to_unw_regnum function in include/dwarf_i.h in libunwind 1.1 allows local users to have unspecified impact via invalid dwarf opcodes.
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 | libunwind | 1.1-4 | — |
| Debian 13 | android-platform-external-libunwind | 7.0.0+r1-4 | — |
| Debian 13 | libunwind | 1.1-4 | — |
| Debian 12 | android-platform-external-libunwind | 7.0.0+r1-4 | — |
| Debian 12 | libunwind | 1.1-4 | — |
| Debian 6.0 | libunwind | 0.99-0.2+deb6u1 | DLA-271-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | racket | No fix yet | — |
| Ubuntu 26.04 LTS | racket | No fix yet | — |
| Ubuntu 25.10 | racket | No fix yet | — |
| Ubuntu 24.04 LTS | racket | No fix yet | — |
| Ubuntu 22.04 LTS | racket | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | racket | No fix yet | — |
| Ubuntu 18.04 LTS | racket | No fix yet | — |
| Ubuntu 16.04 LTS | racket +1 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat OpenStack 6 | libunwind | 1.1-4.1.el7ost | RHSA-2015:1675 |
| Red Hat OpenStack 5 | libunwind | 1.1-4.1.el6ost | RHSA-2015:1769, RHSA-2015:1768 |
| Red Hat OpenStack 5 | libunwind-devel | 1.1-4.1.el7ost | RHSA-2015:1769 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP4 | libunwind | 1.1-11.3.1 | SUSE-SU-2019:0284-1 |
| SLES 12 SP3 | libunwind | 1.1-11.3.1 | SUSE-SU-2019:0284-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP4 | libunwind | 1.1-11.3.1 | SUSE-SU-2019:0284-1 |
| SLES for SAP 12 SP3 | libunwind | 1.1-11.3.1 | SUSE-SU-2019:0284-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | libunwind | 1.2~rc1-2.3 | openSUSE-SU-2024:10288-1 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 3 repositories
-
RenukaSelvar/libunwind_CVE-2015-3239 ★ 0 · Nov 4, 2024
-
RenukaSelvar/libunwind_CVE-2015-3239_After ★ 0 · Nov 4, 2024
-
RenukaSelvar/libunwind_CVE-2015-3239_AfterPatch ★ 0 · Nov 4, 2024
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 6
- DLA-271-1 libunwind - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10288-1 libunwind-1.2~rc1-2.3 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:0284-1 Security update for libunwind SUSE / openSUSE Security Updates · Feb 4, 2026
- RHSA-2015:1769 Red Hat Security Advisory: libunwind security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2015:1768 Red Hat Security Advisory: libunwind security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2015:1675 Red Hat Security Advisory: libunwind security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
References
- RHSA-2015:1675 vendor-advisory
- RHSA-2015:1769 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1232265
- http://git.savannah.gnu.org/cgit/libunwind.git/commit/?id=396b6c7ab737e2bff244d640601c436a26260ca1
- RHSA-2015:1768 vendor-advisory
- 76707 vdb-entry