# CVE-2024-30156: varnish: Varnish Cache is a high-performance HTTP accelerator CVE-2024-30156 is fixed in 4 products on 1 platform, first by DEBIAN-CVE-2024-30156, released March 24, 2024. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2024-30156 - Priority: High - CVSS: 7.5 (Important) - EPSS: 0.0366 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Mar 24, 2024 ## Description Varnish Cache is a high-performance HTTP accelerator. It stores web pages in memory so web servers don't have to create the same web page over and over again, giving the website a significant speed up. Security Fix(es): * varnish: HTTP/2 Broken Window Attack may result in denial of service (CVE-2024-30156) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | varnish Debian 13.5 (trixie) | 7.5.0-1 | [DEBIAN-CVE-2024-30156](https://patchblox.com/security/data/fix/linux/debian-cve-2024-30156.md) | Mar 24, 2024 | | Linux | varnish RHEL 8 | 0:6.0.13-1.module+el8.9.0+21617+7578fa11 | [RHSA-2024:1690](https://patchblox.com/security/data/fix/linux/rhsa-2024-1690.md) | Apr 8, 2024 | | Linux | varnish RHEL 9 | 0:6.6.2-4.el9_3.1 | [RHSA-2024:1691](https://patchblox.com/security/data/fix/linux/rhsa-2024-1691.md) | Apr 8, 2024 | | Linux | varnish almalinux 8 | 6.0.13-1.module_el8.9.0+3786+e8a73bbf.alma.1 | [ALSA-2024:1690](https://patchblox.com/security/data/fix/linux/alsa-2024-1690.md) | Apr 8, 2024 | | Linux | varnish almalinux 9 | 6.6.2-4.el9_3.1 | [ALSA-2024:1691](https://patchblox.com/security/data/fix/linux/alsa-2024-1691.md) | Apr 8, 2024 | | Linux | varnish ol 8 | 0:6.0.13-1.module+el8.9.0+90264+d552af1c | [ELSA-2024-1690](https://patchblox.com/security/data/fix/linux/elsa-2024-1690.md) | Apr 9, 2024 | | Linux | varnish ol 9 | 0:6.6.2-4.el9_3.1 | [ELSA-2024-1691](https://patchblox.com/security/data/fix/linux/elsa-2024-1691.md) | Apr 9, 2024 | | Linux | varnish rocky 8 | 0:6.0.13-1.module+el8.9.0+1777+0acf9965 | [RLSA-2024:1690](https://patchblox.com/security/data/fix/linux/rlsa-2024-1690.md) | May 6, 2024 | | Linux | varnish rocky 9 | 0:6.6.2-4.el9_3.1 | [RLSA-2024:1691](https://patchblox.com/security/data/fix/linux/rlsa-2024-1691.md) | May 10, 2024 | | Linux | varnish-devel RHEL 8 | 0:6.0.13-1.module+el8.9.0+21617+7578fa11 | [RHSA-2024:1690](https://patchblox.com/security/data/fix/linux/rhsa-2024-1690.md) | Apr 8, 2024 | | Linux | varnish-devel RHEL 9 | 0:6.6.2-4.el9_3.1 | [RHSA-2024:1691](https://patchblox.com/security/data/fix/linux/rhsa-2024-1691.md) | Apr 8, 2024 | | Linux | varnish-devel almalinux 8 | 6.0.13-1.module_el8.9.0+3786+e8a73bbf.alma.1 | [ALSA-2024:1690](https://patchblox.com/security/data/fix/linux/alsa-2024-1690.md) | Apr 8, 2024 | | Linux | varnish-devel almalinux 9 | 6.6.2-4.el9_3.1 | [ALSA-2024:1691](https://patchblox.com/security/data/fix/linux/alsa-2024-1691.md) | Apr 8, 2024 | | Linux | varnish-devel ol 8 | 0:6.0.13-1.module+el8.9.0+90264+d552af1c | [ELSA-2024-1690](https://patchblox.com/security/data/fix/linux/elsa-2024-1690.md) | Apr 9, 2024 | | Linux | varnish-devel ol 9 | 0:6.6.2-4.el9_3.1 | [ELSA-2024-1691](https://patchblox.com/security/data/fix/linux/elsa-2024-1691.md) | Apr 9, 2024 | | Linux | varnish-docs RHEL 8 | 0:6.0.13-1.module+el8.9.0+21617+7578fa11 | [RHSA-2024:1690](https://patchblox.com/security/data/fix/linux/rhsa-2024-1690.md) | Apr 8, 2024 | | Linux | varnish-docs RHEL 9 | 0:6.6.2-4.el9_3.1 | [RHSA-2024:1691](https://patchblox.com/security/data/fix/linux/rhsa-2024-1691.md) | Apr 8, 2024 | | Linux | varnish-docs almalinux 8 | 6.0.13-1.module_el8.9.0+3786+e8a73bbf.alma.1 | [ALSA-2024:1690](https://patchblox.com/security/data/fix/linux/alsa-2024-1690.md) | Apr 8, 2024 | | Linux | varnish-docs almalinux 9 | 6.6.2-4.el9_3.1 | [ALSA-2024:1691](https://patchblox.com/security/data/fix/linux/alsa-2024-1691.md) | Apr 8, 2024 | | Linux | varnish-docs ol 8 | 0:6.0.13-1.module+el8.9.0+90264+d552af1c | [ELSA-2024-1690](https://patchblox.com/security/data/fix/linux/elsa-2024-1690.md) | Apr 9, 2024 | | Linux | varnish-docs ol 9 | 0:6.6.2-4.el9_3.1 | [ELSA-2024-1691](https://patchblox.com/security/data/fix/linux/elsa-2024-1691.md) | Apr 9, 2024 | | Linux | varnish-modules RHEL 8 | 0:0.15.0-6.module+el8.9.0+21617+7578fa11 | [RHSA-2024:1690](https://patchblox.com/security/data/fix/linux/rhsa-2024-1690.md) | Apr 8, 2024 | | Linux | varnish-modules almalinux 8 | 0.15.0-6.module_el8.5.0+2620+03a0c2cc | [ALSA-2024:1690](https://patchblox.com/security/data/fix/linux/alsa-2024-1690.md) | Apr 8, 2024 | | Linux | varnish-modules ol 8 | 0:0.15.0-6.module+el8.9.0+90264+d552af1c | [ELSA-2024-1690](https://patchblox.com/security/data/fix/linux/elsa-2024-1690.md) | Apr 9, 2024 | | Linux | varnish-modules rocky 8 | 0:0.15.0-6.module+el8.5.0+677+2a78a869 | [RLSA-2024:1690](https://patchblox.com/security/data/fix/linux/rlsa-2024-1690.md) | May 6, 2024 | --- Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.