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Vulnerability Change Records for CVE-2026-64351

Change History

New CVE Received from kernel.org 7/25/2026 6:17:17 AM

Action Type Old Value New Value
Added Description

                  
                
              
In the Linux kernel, the following vulnerability has been resolved:

net: usb: kalmia: bound RX frame length in kalmia_rx_fixup()

kalmia_rx_fixup() computes usb_packet_length = skb->len - (2 *
KALMIA_HEADER_LENGTH) as a u16, guarded only by a pre-loop check that
skb->len is at least KALMIA_HEADER_LENGTH, which is 6. A device can
deliver a short bulk-IN frame with skb->len in the 6 to 11 range, or
leave a short trailing remainder on a later loop iteration. Either case
underflows usb_packet_length to about 65530.

That bypasses the usb_packet_length < ether_packet_length truncation path.
The device-supplied ether_packet_length, a le16 up to 65535 read from
header_start[2], then drives a memcmp() and the following skb_trim() and
skb_pull() past the end of the rx buffer. The rx buffer is hard_mtu * 10,
which is 14000 bytes. That is an out of bounds read.

Require both the start and end framing headers to be present before
subtracting them, on every loop iteration.
Added Reference

                  
                
              
https://git.kernel.org/stable/c/2d04c37ed4e1d0f733ad39ec35b5a5d8818b4f4a
Added Reference

                  
                
              
https://git.kernel.org/stable/c/391706889a5112feafdc0c68db3ecc7ed325d09c
Added Reference

                  
                
              
https://git.kernel.org/stable/c/46ab32870d010e9a057bc5659cea22b7e728ca88
Added Reference

                  
                
              
https://git.kernel.org/stable/c/47b6bcef6e679593d2e86e04ee72c46a4e2f7139
Added Reference

                  
                
              
https://git.kernel.org/stable/c/51e65f1d78457ea4f9513d90ab22c9dccbb35110
Added Reference

                  
                
              
https://git.kernel.org/stable/c/aa4eef2cbb66ea3dfcfc24bdce798dd78a81b54b
Added Reference

                  
                
              
https://git.kernel.org/stable/c/c466097d85d52f3aa200736cb4759e66d4bbf6e3
Added Reference

                  
                
              
https://git.kernel.org/stable/c/e24eb271061db384a3c3ef6f107fe515e68ef222
Added Affected

                  
                
              
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