CVE-2026-97618io_uring/net: don't overconsume buffers when using MSG_TRUNC
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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]
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 3, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from ae98dbf43d755b4e111fcd086e53939bef3e9a1a before 41d24d2fb168fa05fcaf9ec4e55478411dbbf8e1; from ae98dbf43d755b4e111fcd086e53939bef3e9a1a before 927d96f91c582b319d104ecf50ec935a8dc29193; from ae98dbf43d755b4e111fcd086e53939bef3e9a1a before 2e70ea75c7bb38a6dc212975f887310f14f7c043; from ae98dbf43d755b4e111fcd086e53939bef3e9a1a before 6028b543884f8735e057ec9eea4908cd61cab230 | CNA record |
References
- https://git.kernel.org/stable/c/41d24d2fb168fa05fcaf9ec4e55478411dbbf8e1
- https://git.kernel.org/stable/c/927d96f91c582b319d104ecf50ec935a8dc29193
- https://git.kernel.org/stable/c/2e70ea75c7bb38a6dc212975f887310f14f7c043
- https://git.kernel.org/stable/c/6028b543884f8735e057ec9eea4908cd61cab230
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.