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

netfilter: ipset: Fix overflow before widen in the bitmap_ip_create() function.

When first_ip is 0, last_ip is 0xFFFFFFFF, and netmask is 31, the value of
an arithmetic expression 2 << (netmask - mask_bits - 1) is subject
to overflow due to a failure casting operands to a larger data type
before performing the arithmetic.

Note that it's harmless since the value will be checked at the next step.

Found by InfoTeCS on behalf of Linux Verification Center
(linuxtesting.org) with SVACE.

https://git.kernel.org/stable/c/4e6a70fd840400e3a2e784a6673968a3eb2431c0

https://git.kernel.org/stable/c/511cf17b2447fc41cfef8d71936e1fa53e395c1e

https://git.kernel.org/stable/c/9ea4b476cea1b7d461d16dda25ca3c7e616e2d15

https://git.kernel.org/stable/c/dfd834ccc1b88bbbab81b9046a3a539dd0c2d14f

https://git.kernel.org/stable/c/e137d9bb26bd85ce07323a38e38ceb0b160db841

https://git.kernel.org/stable/c/e88865876d47c790be0d5e23973499d75d034364

https://git.kernel.org/stable/c/feefb33eefa166fc3e0fd17547b0bc0cb3baced9