CVE-2023-49295
An attacker can cause its peer to run out of memory sending a large number of PATH_CHALLENGE frames.
Does this matter?
Lower severity and a low EPSS score (1.20%). Track it; it rarely justifies an emergency change on its own.
Description
quic-go is an implementation of the QUIC protocol (RFC 9000, RFC 9001, RFC 9002) in Go. An attacker can cause its peer to run out of memory sending a large number of PATH_CHALLENGE frames. The receiver is supposed to respond to each PATH_CHALLENGE frame with a PATH_RESPONSE frame. The attacker can prevent the receiver from sending out (the vast majority of) these PATH_RESPONSE frames by collapsing the peers congestion window (by selectively acknowledging received packets) and by manipulating the peer's RTT estimate. This vulnerability has been patched in versions 0.37.7, 0.38.2 and 0.39.4.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 1.20% probability · 68th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-400
- Affected
- quic-go project/quic-go
- Source
- security-advisories@github.com
EPSS 1.2% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/quic-go/quic-go/commit/17fc98c2d81dbe685c19702dc694a9d606ac56dcPatch
- https://github.com/quic-go/quic-go/commit/21609ddfeff93668c7625a85eb09f1541fdad965Patch
- https://github.com/quic-go/quic-go/commit/3a9c18bcd27a01c551ac9bf8bd2b4bded77c189aPatch
- https://github.com/quic-go/quic-go/commit/554d543b50b917369fb1394cc5396d928166cf49Patch
- https://github.com/quic-go/quic-go/commit/6cc3d58935426191296171a6c0d1ee965e10534ePatch
- https://github.com/quic-go/quic-go/commit/9aaefe19fc3dc8c8917cc87e6128bb56d9e9e6ccPatch
- https://github.com/quic-go/quic-go/commit/a0ffa757499913f7be69aa78f573a6aee3430ae4Patch
- https://github.com/quic-go/quic-go/commit/d7aa627ebde91cf799ada2a07443faa9b1e5abb8Patch
- https://github.com/quic-go/quic-go/security/advisories/GHSA-ppxx-5m9h-6vxfVendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/G5RSHDTVMYAIGYVVFGKTMFHAZJMA3EVV/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZE7IOKXX5AATU2WR3V76X5Y3A44QAATG/
- https://github.com/quic-go/quic-go/commit/17fc98c2d81dbe685c19702dc694a9d606ac56dcPatch
- https://github.com/quic-go/quic-go/commit/21609ddfeff93668c7625a85eb09f1541fdad965Patch
- https://github.com/quic-go/quic-go/commit/3a9c18bcd27a01c551ac9bf8bd2b4bded77c189aPatch
- https://github.com/quic-go/quic-go/commit/554d543b50b917369fb1394cc5396d928166cf49Patch
- https://github.com/quic-go/quic-go/commit/6cc3d58935426191296171a6c0d1ee965e10534ePatch
- https://github.com/quic-go/quic-go/commit/9aaefe19fc3dc8c8917cc87e6128bb56d9e9e6ccPatch
- https://github.com/quic-go/quic-go/commit/a0ffa757499913f7be69aa78f573a6aee3430ae4Patch
- https://github.com/quic-go/quic-go/commit/d7aa627ebde91cf799ada2a07443faa9b1e5abb8Patch
- https://github.com/quic-go/quic-go/security/advisories/GHSA-ppxx-5m9h-6vxfVendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/G5RSHDTVMYAIGYVVFGKTMFHAZJMA3EVV/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZE7IOKXX5AATU2WR3V76X5Y3A44QAATG/
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.