Description
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]
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
ae98dbf43d755b4e111fcd086e53939bef3e9a1a to < 41d24d2fb168fa05fcaf9ec4e55478411dbbf8e1affectedae98dbf43d755b4e111fcd086e53939bef3e9a1a to < 927d96f91c582b319d104ecf50ec935a8dc29193affectedae98dbf43d755b4e111fcd086e53939bef3e9a1a to < 2e70ea75c7bb38a6dc212975f887310f14f7c043affectedae98dbf43d755b4e111fcd086e53939bef3e9a1a to < 6028b543884f8735e057ec9eea4908cd61cab230affected
Linux Linux
Default version status: affected
6.12affected0 to < 6.12unaffected6.12.112 to ≤ 6.12.*unaffected6.18.53 to ≤ 6.18.*unaffected7.2.7 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected