Description
Within tcpreplay's tcprewrite, a double free vulnerability has been identified in the dlt_linuxsll2_cleanup() function in plugins/dlt_linuxsll2/linuxsll2.c. This vulnerability is triggered when tcpedit_dlt_cleanup() indirectly invokes the cleanup routine multiple times on the same memory region. By supplying a specifically crafted pcap file to the tcprewrite binary, a local attacker can exploit this flaw to cause a Denial of Service (DoS) via memory corruption.
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 | tcpreplay | 4.5.2-1 | — |
| Debian 13 | tcpreplay | No fix yet | — |
| Debian 12 | tcpreplay | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | tcpreplay | No fix yet | — |
| Ubuntu 26.04 LTS | tcpreplay | No fix yet | — |
| Ubuntu 25.10 | tcpreplay | No fix yet | — |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 24.04 LTS | tcpreplay | No fix yet | — |
| Ubuntu Pro 22.04 LTS | tcpreplay | No fix yet | — |
| Ubuntu Pro 20.04 LTS | tcpreplay | No fix yet | — |
| Ubuntu Pro 18.04 LTS | tcpreplay | No fix yet | — |
| Ubuntu Pro 16.04 LTS | tcpreplay | No fix yet | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | tcpreplay | 4.5.2-1.1 | openSUSE-SU-2025:15728-1 |
| openSUSE Leap 16.0 | tcpreplay | 4.5.2-bp160.1.1 | openSUSE-SU-2025:20119-1 |
Advisories 2
- openSUSE-SU-2025:20119-1 Security update for tcpreplay SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:15728-1 tcpreplay-4.5.2-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026