Description
pcap_ether_aton() is an auxiliary function in libpcap, it takes a string argument and returns a fixed-size allocated buffer. The string argument must be a well-formed MAC-48 address in one of the supported formats, but this requirement has been poorly documented. If an application calls the function with an argument that deviates from the expected format, the function can read data beyond the end of the provided string and write data beyond the end of the allocated buffer.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| The Tcpdump Group | libpcap | < 1.10.6 | 1.10.6 |
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 | libpcap | 1.10.6-1 | — |
| Debian 13 | libpcap | No fix yet | — |
| Debian 12 | libpcap | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | libpcap | No fix yet | — |
| Ubuntu 25.10 | libpcap | No fix yet | — |
| Ubuntu 24.04 LTS | libpcap | No fix yet | — |
| Ubuntu 22.04 LTS | libpcap | No fix yet | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | libpcap | No fix yet | — |
| Ubuntu Pro 18.04 LTS | libpcap | No fix yet | — |
| Ubuntu Pro 16.04 LTS | libpcap | No fix yet | — |
| Ubuntu Pro 14.04 LTS | libpcap | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | libpcap | 1.10.5-150700.3.7.1 | SUSE-SU-2026:0063-1 |
| SLES 12 SP5 | libpcap | 1.8.1-10.9.1 | SUSE-SU-2026:0062-1 |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | libpcap | 1.10.5-160000.4.1 | SUSE-SU-2026:20120-1 |
| SLES 16.0 | libpcap | 1.10.5-160000.4.1 | SUSE-SU-2026:20120-1 |
| SLE Micro 6.2 | libpcap | 1.10.5-160000.4.1 | SUSE-SU-2026:20153-1 |
| SLE Micro 6.1 | libpcap | 1.10.4-slfo.1.1_2.1 | SUSE-SU-2026:20064-1 |
| SLE Micro 6.0 | libpcap | 1.10.4-4.1 | SUSE-SU-2026:20048-1 |
| SLE Micro 5.5 | libpcap | 1.10.1-150400.3.9.1 | SUSE-SU-2026:0575-1 |
| SLE Micro 5.4 | libpcap | 1.10.1-150400.3.9.1 | SUSE-SU-2026:0575-1 |
| SLE Micro 5.3 | libpcap | 1.10.1-150400.3.9.1 | SUSE-SU-2026:0575-1 |
| SLE Micro 5.2 | libpcap | 1.9.1-150300.3.6.1 | SUSE-SU-2026:0053-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | libpcap | 1.10.6-1.1 | openSUSE-SU-2026:10032-1 |
| openSUSE Leap 16.0 | libpcap | 1.10.5-160000.4.1 | openSUSE-SU-2026:20075-1 |
| openSUSE Leap 15.6 | libpcap | 1.10.4-150600.3.9.1 | SUSE-SU-2026:0036-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | libpcap | 1.10.6-r0 | — |
| Alpine v3.23 | libpcap | 1.10.7-r0 | — |
| Alpine v3.22 | libpcap | 1.10.7-r0 | — |
| Alpine v3.21 | libpcap | 1.10.7-r0 | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | libpcap | 1.10.6-1 | — |
| Azure Linux 3 | nmap | 7.95-3 | — |
| Azure Linux 2 (CBL-Mariner) | libpcap | 1.10.1-5 | — |
| Azure Linux 2 (CBL-Mariner) | nmap | 7.93-4 | — |
Advisories 11
- openSUSE-SU-2026:20075-1 Security update for libpcap SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2026:10032-1 libpcap-devel-1.10.6-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20153-1 Security update for libpcap SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20120-1 Security update for libpcap SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20064-1 Security update for libpcap SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20048-1 Security update for libpcap SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:0575-1 Security update for libpcap SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:0053-1 Security update for libpcap SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:0062-1 Security update for libpcap SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:0036-1 Security update for libpcap SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:0063-1 Security update for libpcap SUSE / openSUSE Security Updates · Mar 23, 2026