Description
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to versions 6.0.16 and 7.0.3, an attacker can craft traffic to cause Suricata to use far more CPU and memory for processing the traffic than needed, which can lead to extreme slow downs and denial of service. This vulnerability is patched in 6.0.16 or 7.0.3. Workarounds include disabling the affected protocol app-layer parser in the yaml and reducing the `stream.reassembly.depth` value helps reduce the severity of the issue.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| OISF | suricata | < 6.0.16, >= 7.0.0, < 7.0.3 | — |
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 | suricata | 1:7.0.3-1 | — |
| Debian 13 | suricata | 1:7.0.3-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | suricata | No fix yet | — |
| Ubuntu 26.04 LTS | suricata | No fix yet | — |
| Ubuntu 25.10 | suricata | No fix yet | — |
| Ubuntu 24.04 LTS | suricata | No fix yet | — |
| Ubuntu 22.04 LTS | suricata | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | suricata | No fix yet | — |
| Ubuntu 16.04 LTS | suricata | No fix yet | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | suricata | 8.0.0-1.1 | openSUSE-SU-2025:15394-1 |
Advisories 1
- openSUSE-SU-2025:15394-1 libsuricata8_0_0-8.0.0-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
References
- https://github.com/OISF/suricata/security/advisories/GHSA-q33q-45cr-3cpc
- https://github.com/OISF/suricata/commit/18841a58da71e735ddf4e52cbfa6989755ecbeb7
- https://github.com/OISF/suricata/commit/2a2120ecf10c5b5713ec2bf59469fe57f7b5b747
- https://github.com/OISF/suricata/commit/83c5567ea7b0b28376f57dcfee9c6301448c7bc7
- https://github.com/OISF/suricata/commit/8efaebe293e2a74c8e323fa85a6f5fadf82801bc
- https://github.com/OISF/suricata/commit/97953998d2d60673ed6c30ddfb6a2d59b4230f97
- https://github.com/OISF/suricata/commit/b1549e930f6426eeff43f12b672337cbcda566b8
- https://github.com/OISF/suricata/commit/cd035d59e3df157b606f4fe67324ea8e437be786
- https://github.com/OISF/suricata/commit/ce9b90326949c94a46611d6394e28600ee5e8bd5
- https://github.com/OISF/suricata/commit/e7e28822f473320658d6125f16ac3f0524baff01
- https://github.com/OISF/suricata/commit/f9de1cca6182e571f1c02387dca6e695e55608af
- https://redmine.openinfosecfoundation.org/issues/6531
- https://redmine.openinfosecfoundation.org/issues/6532
- https://redmine.openinfosecfoundation.org/issues/6540
- https://redmine.openinfosecfoundation.org/issues/6658
- https://redmine.openinfosecfoundation.org/issues/6659
- https://redmine.openinfosecfoundation.org/issues/6660
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GOCOBFUTIFHOP2PZOH4ENRFXRBHIRKK4/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZXJIT7R53ZXROO3I256RFUWTIW4ECK6P/