CVE-2026-97618High· 7.0▾ TwilightIn the Linux kernel, the following vulnerability has been resolved: io_uring/net: don't overconsume buffers when using MSG_TRUNC When a recv/recvmsg is issued with MSG_TRUNC and the incoming packet is larger than the provided buffer, t…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 38.5 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 27.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.2%
— → 7
none → high
Last analysed / modified upstream
0.2% → 0.2%
In the Linux kernel, the following vulnerability has been resolved:
io_uring/net: don't overconsume buffers when using MSG_TRUNC
When a recv/recvmsg is issued with MSG_TRUNC and the incoming packet is larger than the provided buffer, the net layer returns the full length of the packet rather than the number of bytes actually copied into the buffer. As a result, io_uring advances more of the provided buffer ring than was actually filled. Use the actual filled region size to consume the buffer, but still return the full size to preserve MSG_TRUNC semantics.
Take care with multishot, because that seems to already truncate the consumption based on the available payload size.
This was reported in https://github.com/axboe/liburing/issues/1619.
[axboe: fold in size_t unsigned fix]
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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