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

udf: validate VAT header length against the VAT inode size

udf_load_vat() takes the virtual partition's start offset straight from
the on-disk VAT 2.0 header without checking it against the VAT inode
size:

	map->s_type_specific.s_virtual.s_start_offset =
		le16_to_cpu(vat20->lengthHeader);
	map->s_type_specific.s_virtual.s_num_entries =
		(sbi->s_vat_inode->i_size -
			map->s_type_specific.s_virtual.s_start_offset) >> 2;

lengthHeader is a fully attacker-controlled 16-bit value.  If it exceeds
the VAT inode size, the s_num_entries subtraction underflows to a huge
count, which defeats the "block > s_num_entries" bound in
udf_get_pblock_virt15(); and on the ICB-inline path that function reads

	((__le32 *)(iinfo->i_data + s_start_offset))[block]

so a large s_start_offset indexes past the inode's in-ICB data.  Mounting
a crafted UDF image with a virtual (VAT) partition then triggers an
out-of-bounds read.

Reject a VAT whose header length does not leave room for at least one
entry within the VAT inode.

https://git.kernel.org/stable/c/0ad2d09a8d66fa8dc6f9b70d660b5fb4478ea934

https://git.kernel.org/stable/c/2900e02a0dd4fc30ac9840e7ce4ca0b041ab0d63

https://git.kernel.org/stable/c/55287a3555ff0515b3aff181d2c08c0462a41709

https://git.kernel.org/stable/c/74580fdf022909e184223cacc364feb826982d96

https://git.kernel.org/stable/c/883962731420ec271ed8c1cd76524f4b17faa982

https://git.kernel.org/stable/c/bb0d384c1f42a5b7ace0bd88fee80b9bb1d49acb

https://git.kernel.org/stable/c/d8202786b3d75125c84ebc4de6d946f92fde0ee8

https://git.kernel.org/stable/c/e610fb113cdfa8bf4247c9bf4f2337b81ad4ddad

[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["fs/udf/super.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"fa5e08156335d0687c85b4e724db9448fb166601","lessThan":"0ad2d09a8d66fa8dc6f9b70d660b5fb4478ea934","versionType":"git","status":"affected"},{"version":"fa5e08156335d0687c85b4e724db9448fb166601","lessThan":"883962731420ec271ed8c1cd76524f4b17faa982","versionType":"git","status":"affected"},{"version":"fa5e08156335d0687c85b4e724db9448fb166601","lessThan":"2900e02a0dd4fc30ac9840e7ce4ca0b041ab0d63","versionType":"git","status":"affected"},{"version":"fa5e08156335d0687c85b4e724db9448fb166601","lessThan":"bb0d384c1f42a5b7ace0bd88fee80b9bb1d49acb","versionType":"git","status":"affected"},{"version":"fa5e08156335d0687c85b4e724db9448fb166601","lessThan":"55287a3555ff0515b3aff181d2c08c0462a41709","versionType":"git","status":"affected"},{"version":"fa5e08156335d0687c85b4e724db9448fb166601","lessThan":"e610fb113cdfa8bf4247c9bf4f2337b81ad4ddad","versionType":"git","status":"affected"},{"version":"fa5e08156335d0687c85b4e724db9448fb166601","lessThan":"74580fdf022909e184223cacc364feb826982d96","versionType":"git","status":"affected"},{"version":"fa5e08156335d0687c85b4e724db9448fb166601","lessThan":"d8202786b3d75125c84ebc4de6d946f92fde0ee8","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["fs/udf/super.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"2.6.26","status":"affected"},{"version":"0","lessThan":"2.6.26","versionType":"semver","status":"unaffected"},{"version":"5.10.261","lessThanOrEqual":"5.10.*","versionType":"semver","status":"unaffected"},{"version":"5.15.212","lessThanOrEqual":"5.15.*","versionType":"semver","status":"unaffected"},{"version":"6.1.178","lessThanOrEqual":"6.1.*","versionType":"semver","status":"unaffected"},{"version":"6.6.145","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.96","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.39","lessThanOrEqual":"6.18.*","versionType":"semver","status":"unaffected"},{"version":"7.1.4","lessThanOrEqual":"7.1.*","versionType":"semver","status":"unaffected"},{"version":"7.2-rc1","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]