PT-2026-34679 · Linux+2 · Linux Kernel+2
Published
2026-04-23
·
Updated
2026-06-11
·
CVE-2026-31533
CVSS v3.1
9.8
Critical
| Vector | AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
A use-after-free issue exists in the net/tls component. When the
crypto aead encrypt() function returns -EBUSY, a request is enqueued to the cryptd backlog. If the tls encrypt async wait() function subsequently returns an error, the synchronous error path in tls do encryption() performs a cleanup of the encrypt pending variable and the scatterlist entry that has already been handled by the tls encrypt done() callback. This double-decrement corrupts the encrypt pending sentinel, causing tls encrypt async wait() to permanently skip waiting for pending async callbacks. Consequently, a subsequent sendmsg operation can free the tls rec via bpf exec tx verdict() while a cryptd callback is still pending, leading to a use-after-free when the callback executes on the freed record.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Use After Free
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Weakness Enumeration
Related Identifiers
Affected Products
Linuxmint
Linux Kernel
Ubuntu