Description
The wwunpack function in libclamav/wwunpack.c in ClamAV 0.99.2 allows remote attackers to cause a denial of service (use-after-free) via a crafted PE file with WWPack compression.
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 | clamav | 0.99.3~beta1+dfsg-1 | — |
| Debian 13 | clamav | 0.99.3~beta1+dfsg-1 | — |
| Debian 12 | clamav | 0.99.3~beta1+dfsg-1 | — |
| Debian 7 | clamav | 0.99.2+dfsg-0+deb7u3 | DLA-1261-1, DLA-1105-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | clamav | 0.99.2+dfsg-0ubuntu0.16.04.2 | USN-3393-1 |
| Ubuntu 14.04 LTS | clamav | 0.99.2+addedllvm-0ubuntu0.14.04.2 | USN-3393-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | clamav | 0.99.3-33.5.1 | SUSE-SU-2018:0255-1 |
| SLES 12 SP2 | clamav | 0.99.3-33.5.1 | SUSE-SU-2018:0255-1 |
| SLES 12 SP1 | clamav | 0.99.3-33.5.1 | SUSE-SU-2018:0255-1 |
| SLES 12 | clamav | 0.99.3-33.5.1 | SUSE-SU-2018:0255-1 |
| SLES 11 SP4 | clamav | 0.99.3-0.20.3.2 | SUSE-SU-2018:0254-1 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 11 SP3 | clamav | 0.99.3-0.20.3.2 | SUSE-SU-2018:0254-1 |
| SLES for SAP 12 SP3 | clamav | 0.99.3-33.5.1 | SUSE-SU-2018:0255-1 |
| SLES for SAP 12 SP2 | clamav | 0.99.3-33.5.1 | SUSE-SU-2018:0255-1 |
| SLES for SAP 12 SP1 | clamav | 0.99.3-33.5.1 | SUSE-SU-2018:0255-1 |
| SLES for SAP 12 | clamav | 0.99.3-33.5.1 | SUSE-SU-2018:0255-1 |
| SLES for SAP 11 SP4 | clamav | 0.99.3-0.20.3.2 | SUSE-SU-2018:0254-1 |
| SUSE OpenStack Cloud 6 | clamav | 0.99.3-33.5.1 | SUSE-SU-2018:0255-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | clamav | 0.99.3-0.20.3.2 | SUSE-SU-2018:0254-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | clamav | 0.103.3-1.4 | openSUSE-SU-2024:10685-1 |
Advisories 6
- USN-3393-1 clamav vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-1105-1 clamav - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1261-1 clamav - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10685-1 clamav-0.103.3-1.4 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0254-1 Security update for clamav SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0255-1 Security update for clamav SUSE / openSUSE Security Updates · May 2, 2025