CVE-2026-72330
CVE CVE-2026-72330EUVD EUVD-2026-59229Published 2026-08-15T05:55:40.000ZLast changed 2026-08-17T05:42:52.000ZCVSS 7.5
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: net/tls: Consume empty data records in tls_sw_read_sock() A peer may send a zero-length TLS application_data record; TLS 1.3 explicitly permits these as a traffic-analysis countermeasure (RFC 8446, Section 5.1). After decryption such a record has full_len == 0. tls_sw_read_sock() hands it to the read_actor, which has no payload to consume and returns zero. The loop treats a zero return as backpressure (used <= 0), requeues the skb at the head of rx_list, and stops. rx_list is serviced head-first on the next call, so the empty record is dequeued, fails the same way, and is requeued again; every later record on the connection is blocked behind it. tls_sw_recvmsg() does not stall on this: a zero-length data record copies nothing and falls through to consume_skb(). Mirror that in the read_sock() path by recognizing an empty data record before the actor runs, consuming it, and continuing.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux 662fbcec32f4af6bdcf5b4006b792ebe9543d945 <3be28e2c9cd0230cb51fd4967df095273afd3848; 662fbcec32f4af6bdcf5b4006b792ebe9543d945 <c6b440cf766a557b08d25f1b571b3d57d039686e; patch: 6.12.97; 662fbcec32f4af6bdcf5b4006b792ebe9543d945 <ebc295ce343600c2d60c1e1e0c5d192080217457; patch: 7.1.5; patch: 6.18.40; patch: 7.2; 662fbcec32f4af6bdcf5b4006b792ebe9543d945 <e8a4c9fc437b16aef38f86ce3275677e36924259; 662fbcec32f4af6bdcf5b4006b792ebe9543d945 <0867b0f2513ebc1c475af9898c97f4772a68d964; 6.6; patch: 6.6.145; patch: 0
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
Does this concern one of your customers?
This page cannot answer that — it does not know your estate. Whoever has recorded their environments gets the answer the morning after publication, together with a paragraph they can forward to the customer unedited.
Try it for 28 daysPatchlage reports hits and suspected hits. About everything else this system says nothing — neither this page nor the situation report ever claims that an estate is safe.