Issue summary: Remote peer may exhaust heap memory of the QUIC server or client by flooding it with packets containing PATH_CHALLENGE frames.
Impact summary: A malicious remote peer can cause an unbounded memory allocation which can lead to an abnormal termination of the application acting as a QUIC client or server and a Denial of Service.
A remote peer may exhaust heap memory by flooding the local QUIC stack with PATH_CHALLENGE frames. The local QUIC stack allocates a PATH_RESPONSE frame for every PATH_CHALLENGE it receives. The allocated PATH_RESPONSE frame gets freed only when the remote peer acknowledges reception of the PATH_RESPONSE frame which will not be done by a malicious peer.
The FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by this issue. The QUIC stack is outside of OpenSSL FIPS module boundary.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade openssl-perlUpgrade opensslUpgrade openssl-develUpgrade openssl-libs | Jun 16, 2026 | Jun 11, 2026 |
| Alpine Linux | — | Upgrade openssl | Jun 18, 2026 | Jun 9, 2026 |
| Amazon_linux_2023 | — | Upgrade openssl-debuginfoUpgrade openssl-debugsourceUpgrade openssl-libs-debuginfoUpgrade opensslUpgrade openssl-snapsafe-libsUpgrade openssl-perlUpgrade openssl-fips-provider-latestUpgrade openssl-fips-provider-latest-debuginfoUpgrade openssl-develUpgrade openssl-snapsafe-libs-debuginfoUpgrade openssl-libs | Jun 23, 2026 | Jun 9, 2026 |
| Debian | — | Upgrade openssl | Jul 23, 2026 | Jul 23, 2026 |
| Freebsd | — | Upgrade openssl111Upgrade openssl40Upgrade openssl35Upgrade opensslUpgrade openssl36Upgrade openssl34Upgrade FreeBSD | Jun 15, 2026 | Jun 10, 2026 |
| Http Openssl | — | Upgrade to the latest version of OpenSSL | Jun 10, 2026 | Jun 9, 2026 |
| Oracle Missing Cpu Jul 2026 | — | Apply the July 2026 Critical Patch Update (CPU) for Oracle Database | Jul 22, 2026 | Jun 9, 2026 |
| Redhat_linux | — | Upgrade openssl-libs-debuginfoUpgrade openssl-debugsourceUpgrade opensslUpgrade openssl-debuginfoUpgrade openssl-libsUpgrade openssl-perlUpgrade openssl-devel | Jun 17, 2026 | Jun 9, 2026 |
| Rocky_linux | — | Upgrade openssl-libsUpgrade openssl-debuginfoUpgrade openssl-develUpgrade openssl-libs-debuginfoUpgrade openssl-debugsourceUpgrade opensslUpgrade openssl-perl | Jun 17, 2026 | Jun 13, 2026 |
| Ubuntu | — | Upgrade libssl3Upgrade libssl3t64Upgrade openssl | Jun 16, 2026 | Jun 9, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jun 18, 2026 | Jun 9, 2026 |
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