CVE-2024-28182
This causes excessive CPU usage to decode HPACK stream. nghttp2 v1.61.0 mitigates this vulnerability by limiting the number of CONTINUATION frames it accepts per stream.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 85.0%, higher than 100% of all known CVEs. Patch or mitigate before the next change window.
Description
nghttp2 is an implementation of the Hypertext Transfer Protocol version 2 in C. The nghttp2 library prior to version 1.61.0 keeps reading the unbounded number of HTTP/2 CONTINUATION frames even after a stream is reset to keep HPACK context in sync. This causes excessive CPU usage to decode HPACK stream. nghttp2 v1.61.0 mitigates this vulnerability by limiting the number of CONTINUATION frames it accepts per stream. There is no workaround for this vulnerability.
- CVSS 3.1
- 5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- EPSS
- 84.96% probability · 100th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-770
- Affected
- nghttp2/nghttp2 · debian/debian linux · fedoraproject/fedora
- Source
- security-advisories@github.com
EPSS 85.0% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.openwall.com/lists/oss-security/2024/04/03/16Mailing List, Third Party Advisory
- https://github.com/nghttp2/nghttp2/commit/00201ecd8f982da3b67d4f6868af72a1b03b14e0Patch
- https://github.com/nghttp2/nghttp2/commit/d71a4668c6bead55805d18810d633fbb98315af9Patch
- https://github.com/nghttp2/nghttp2/security/advisories/GHSA-x6x3-gv8h-m57qVendor Advisory
- https://lists.debian.org/debian-lts-announce/2024/04/msg00026.htmlMailing List
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AGOME6ZXJG7664IPQNVE3DL67E3YP3HY/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/J6ZMXUGB66VAXDW5J6QSTHM5ET25FGSA/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PXJO2EASHM2OQQLGVDY5ZSO7UVDVHTDK/Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2024/04/03/16Mailing List, Third Party Advisory
- https://github.com/nghttp2/nghttp2/commit/00201ecd8f982da3b67d4f6868af72a1b03b14e0Patch
- https://github.com/nghttp2/nghttp2/commit/d71a4668c6bead55805d18810d633fbb98315af9Patch
- https://github.com/nghttp2/nghttp2/security/advisories/GHSA-x6x3-gv8h-m57qVendor Advisory
- https://lists.debian.org/debian-lts-announce/2024/04/msg00026.htmlMailing List
- https://lists.debian.org/debian-lts-announce/2024/09/msg00041.htmlMailing List
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AGOME6ZXJG7664IPQNVE3DL67E3YP3HY/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/J6ZMXUGB66VAXDW5J6QSTHM5ET25FGSA/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PXJO2EASHM2OQQLGVDY5ZSO7UVDVHTDK/Mailing List, Third Party Advisory
- https://www.kb.cert.org/vuls/id/421644
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
- https://cert-portal.siemens.com/productcert/html/ssa-784301.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.