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

netfilter: nft_exthdr: fix register tracking for F_PRESENT flag

nft_exthdr_init() passes user-controlled priv->len to
nft_parse_register_store(), which marks that many bytes in the
register bitmap as initialized.  However, when NFT_EXTHDR_F_PRESENT
is set, the eval paths write only 1 byte (nft_reg_store8) or
4 bytes (*dest = 0 on TCP/DCCP error path).  When len > 4,
registers beyond the first are never written, retaining
uninitialized stack data from nft_regs.

Bail out if userspace requests too much data when F_PRESENT is set.

https://git.kernel.org/stable/c/19748967d59c31d24d21d40b728570788310b237

https://git.kernel.org/stable/c/46fc15a044e9938e7ea77786fb37edd2cd74f031

https://git.kernel.org/stable/c/67b27434c43b68a97becda98c9f0c8cf6cba2134

https://git.kernel.org/stable/c/772cecf198da732faebb5dcfc46d66a505be8495

https://git.kernel.org/stable/c/78069a6d8bc86c9e036eb82c2af4a19cc1871a53

https://git.kernel.org/stable/c/8738b1b6d0e639ca1fc0f61516afd3557ac4ecc6

https://git.kernel.org/stable/c/cd513e43b4b2bd1de39e2367bc4261c699a8652f

https://git.kernel.org/stable/c/f08fb3d42fd3aad0b7a263da3ac3ebaf0845e265

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