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Description

In the Linux kernel, the following vulnerability has been resolved: tls: handle data disappearing from under the TLS ULP TLS expects that it owns the receive queue of the TCP socket. This cannot be guaranteed in case the reader of the TCP socket entered before the TLS ULP was installed, or uses some non-standard read API (eg. zerocopy ones). Replace the WARN_ON() and a buggy early exit (which leaves anchor pointing to a freed skb) with real error handling. Wipe the parsing state and tell the reader to retry. We already reload the anchor every time we (re)acquire the socket lock, so the only condition we need to avoid is an out of bounds read (not having enough bytes in the socket for previously parsed record len). If some data was read from under TLS but there's enough in the queue we'll reload and decrypt what is most likely not a valid TLS record. Leading to some undefined behavior from TLS perspective (corrupting a stream? missing an alert? missing an attack?) but no kernel crash should take place.

PUBLISHED Reserved 2025-04-16 | Published 2025-08-22 | Updated 2025-09-29 | Assigner Linux

Product status

Default status
unaffected

84c61fe1a75b4255df1e1e7c054c9e6d048da417 before f1fe99919f629f980d0b8a7ff16950bffe06a859
affected

84c61fe1a75b4255df1e1e7c054c9e6d048da417 before eb0336f213fe88bbdb7d2b19c9c9ec19245a3155
affected

84c61fe1a75b4255df1e1e7c054c9e6d048da417 before db3658a12d5ec4db7185ae7476151a50521b7207
affected

84c61fe1a75b4255df1e1e7c054c9e6d048da417 before 2fb97ed9e2672b4f6e24ce206ac1a875ce4bcb38
affected

84c61fe1a75b4255df1e1e7c054c9e6d048da417 before 6db015fc4b5d5f63a64a193f65d98da3a7fc811d
affected

Default status
affected

6.0
affected

Any version before 6.0
unaffected

6.6.103
unaffected

6.12.43
unaffected

6.15.11
unaffected

6.16.2
unaffected

6.17
unaffected

References

git.kernel.org/...c/f1fe99919f629f980d0b8a7ff16950bffe06a859

git.kernel.org/...c/eb0336f213fe88bbdb7d2b19c9c9ec19245a3155

git.kernel.org/...c/db3658a12d5ec4db7185ae7476151a50521b7207

git.kernel.org/...c/2fb97ed9e2672b4f6e24ce206ac1a875ce4bcb38

git.kernel.org/...c/6db015fc4b5d5f63a64a193f65d98da3a7fc811d

cve.org (CVE-2025-38616)

nvd.nist.gov (CVE-2025-38616)

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