{"id":"CVE-2026-88822","published":"2026-11-10T19:21:34.623","lastModified":"2026-11-10T22:10:04.727","description":"Issue summary: QUIC, when performing automated peer detection, may allow\nuninitialized stack data to leak into the received address which is then used\nas the destination for outgoing packets.\n\nImpact summary: Applications using QUIC's automated peer detection mechanism\nmay receive an invalid address, leading to connection loss and disclosure of\nuninitialized stack data to an attacker observing the outgoing network traffic.\n\nCWE: CWE-457 (Use of Uninitialized Variable)\n\nDescription: The OpenSSL QUIC stack contains a feature in which, when using an\nalready connected socket, it will auto-detect the peer address during the SSL\nhandshake.  This feature uses the getpeername() function, passing a buffer of\nsufficient length to hold any supported address family, but passes a buffer\nlength that is only sized such that larger addresses, such as IPv6, cannot be\nretrieved. The getpeername() function however, still returns the full address\nlength, which is accepted as the valid input buffer length, leading to the\naddress buffer containing uninitialized stack data instead of the actual peer\naddress. The invalid peer address is then used as destination for the outgoing\npackets which leads to a connectivity breakage and a leakage of the\nuninitialized stack data to passive network observers.\n\nFIPS impact: no\nThe FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by this CVE as\nthe affected protocol is not implemented in the FIPS module.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":["CWE-457"],"vendors":[],"products":[],"references":[{"url":"https://github.com/openssl/openssl/commit/1a73dc590cbad62d6f0329ea4779eadaa8d8fd75","tags":[]},{"url":"https://github.com/openssl/openssl/commit/7b4f5344aa0401e7b777640050b5257ed2a70e88","tags":[]},{"url":"https://github.com/openssl/openssl/commit/911eee8eb7550b95a206f1ad8cbdb986098982f3","tags":[]},{"url":"https://openssl-library.org/news/secadv/20261110.txt","tags":[]}],"exploitRefs":[{"url":"https://github.com/openssl/openssl/commit/1a73dc590cbad62d6f0329ea4779eadaa8d8fd75","tags":[]},{"url":"https://github.com/openssl/openssl/commit/7b4f5344aa0401e7b777640050b5257ed2a70e88","tags":[]},{"url":"https://github.com/openssl/openssl/commit/911eee8eb7550b95a206f1ad8cbdb986098982f3","tags":[]}],"hasPoc":true,"ai":null}