CVE-2026-80904: Linux kernel · net/tls: Fail tls_sw_splice_read() after a failed async decrypt
Source GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 13:47 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 5% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 4 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
Description
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
- nvd.nist.gov/vuln/detail/CVE-2026-80904 (opens in a new tab)
- git.kernel.org/stable/c/06c2a53604fa1dc4820063828d7dadb3675b7af8 (opens in a new tab)
- git.kernel.org/stable/c/18ae1e95f20867106a28820c208a9cec99dda861 (opens in a new tab)
- git.kernel.org/stable/c/4b177911eb9f799e9841c2f87c75b08cb112757a (opens in a new tab)
- git.kernel.org/stable/c/82d9269f01ebfd835b6256aa17016a974cbbc647 (opens in a new tab)
- git.kernel.org/stable/c/976df67f463db1fddaf2a32fb04f57ad2891a23d (opens in a new tab)
- git.kernel.org/stable/c/a808aadff634c7a408b2ab84d5919e9a741fdb5b (opens in a new tab)