CVE-2025-39946: stato di sfruttamento e disponibilità della patch
CVE-2025-39946 · CVSS 5.5 MEDIUM · EPSS 9%
In the Linux kernel, the following vulnerability has been resolved:
tls: make sure to abort the stream if headers are bogus
Normally we wait for the socket to buffer up the whole record
before we service it. If the socket has a tiny buffer, however,
we read out the data sooner, to prevent connection stalls.
Make sure that we abort the connection when we find out late
that the record is actually invalid. Retrying the parsing is
fine in itself but since we copy some more data each time
before we parse we can overflow the allocated skb space.
Constructing a scenario in which we're under pressure without
enough data in the socket to parse the length upfront is quite
hard. syzbot figured out a way to do this by serving us the header
in small OOB sends, and then filling in the recvbuf with a large
normal send.
Make sure that tls_rx_msg_size() aborts strp, if we reach
an invalid record there's really no way to recover.
CVE-2025-39946 viene sfruttato?
Non è nel catalogo CISA KEV.
EPSS stima la probabilità di sfruttamento nei prossimi 30 giorni al 9%.
Codice di exploit pubblico: nessuno trovato nelle fonti monitorate.
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