Description
NULL pointer dereference vulnerability exists in GNU libmicrohttpd v1.0.2 and earlier. The vulnerability was fixed in commit ff13abc on the master branch of the libmicrohttpd Git repository, after the v1.0.2 tag. A specially crafted packet sent by an attacker could cause a denial-of-service (DoS) condition.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| GNU Project | GNU libbmicrohttpd | v1.0.2 and earlier (The vulnerability remains in the source code up until commit ff13abc on the master branch of the libmicrohttpd Git repository, after the v1.0.2 tag.) | — |
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 | libmicrohttpd | No fix yet | — |
| Debian 13 | libmicrohttpd | No fix yet | — |
| Debian 12 | libmicrohttpd | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | libmicrohttpd | No fix yet | — |
| Ubuntu 26.04 LTS | libmicrohttpd | No fix yet | — |
| Ubuntu 25.10 | libmicrohttpd | No fix yet | — |
| Ubuntu 24.04 LTS | libmicrohttpd | No fix yet | — |
| Ubuntu 22.04 LTS | libmicrohttpd | No fix yet | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | libmicrohttpd | No fix yet | — |
| Ubuntu 18.04 LTS | libmicrohttpd | No fix yet | — |
| Ubuntu 16.04 LTS | libmicrohttpd | No fix yet | — |
| Ubuntu 14.04 LTS | libmicrohttpd | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | libmicrohttpd | 0.9.77-150600.3.3.1 | SUSE-SU-2025:4291-1 |
| SLES 15 SP6 | libmicrohttpd | 0.9.77-150600.3.3.1 | SUSE-SU-2025:4291-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | libmicrohttpd | 1.0.1-160000.3.1 | SUSE-SU-2026:20029-1 |
| SLES 16.0 | libmicrohttpd | 1.0.1-160000.3.1 | SUSE-SU-2026:20029-1 |
| SLE Micro 6.2 | libmicrohttpd | 1.0.1-160000.3.1 | SUSE-SU-2026:20072-1 |
| SLE Micro 6.1 | libmicrohttpd | 0.9.77-slfo.1.1_2.1 | SUSE-SU-2026:20057-1 |
| SLE Micro 6.0 | libmicrohttpd | 0.9.77-2.1 | SUSE-SU-2025:21200-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 16.0 | libmicrohttpd | 1.0.1-160000.3.1 | openSUSE-SU-2026:20016-1 |
| openSUSE Leap 15.6 | libmicrohttpd | 0.9.77-150600.3.3.1 | SUSE-SU-2025:4291-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | libmicrohttpd | 0.9.77-4 | — |
| Azure Linux 2 (CBL-Mariner) | libmicrohttpd | No fix yet | — |
Advisories 6
- openSUSE-SU-2026:20016-1 Security update for libmicrohttpd SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20072-1 Security update for libmicrohttpd SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20057-1 Security update for libmicrohttpd SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20029-1 Security update for libmicrohttpd SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:21200-1 Security update for libmicrohttpd SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:4291-1 Security update for libmicrohttpd SUSE / openSUSE Security Updates · Feb 4, 2026