CVE-2026-80904

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CVE-2026-80904

Summary: net/tls: Fail tls_sw_splice_read() after a failed async decrypt

Details: In the Linux kernel, the following vulnerability has been resolved: net/tls: Fail tls_sw_splice_read() after a failed async decrypt When an async decrypt fails, tls_decrypt_done() records the error in ctx->async_wait.err and calls tls_err_abort(), which stores it in sk_err. tls_sw_recvmsg() and tls_sw_read_sock() each read async_wait.err once they hold the reader lock and fail the call: a record that did not authenticate breaks the connection. tls_sw_splice_read() has no such check, and sk_err does not stand in for one. tls_rx_rec_wait() tests sk_err only inside the loop it skips whenever a record is already parsed, and the first reader to reach sock_error() clears it, while async_wait.err persists. A splice therefore keeps delivering records on a connection that recvmsg() and read_sock() refuse to read. Read async_wait.err in tls_sw_splice_read() as the other two readers do.

References: https://git.kernel.org/stable/c/06c2a53604fa1dc4820063828d7dadb3675b7af8, https://git.kernel.org/stable/c/18ae1e95f20867106a28820c208a9cec99dda861, https://git.kernel.org/stable/c/4b177911eb9f799e9841c2f87c75b08cb112757a, https://git.kernel.org/stable/c/82d9269f01ebfd835b6256aa17016a974cbbc647, https://git.kernel.org/stable/c/976df67f463db1fddaf2a32fb04f57ad2891a23d, https://git.kernel.org/stable/c/a808aadff634c7a408b2ab84d5919e9a741fdb5b, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80904.json, https://nvd.nist.gov/vuln/detail/CVE-2026-80904, https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git