CVE-2023-53566

Summary

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

netfilter: nft_set_rbtree: fix null deref on element insertion

There is no guarantee that rb_prev() will not return NULL in nft_rbtree_gc_elem():

general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f] nft_add_set_elem+0x14b0/0x2990 nf_tables_newsetelem+0x528/0xb30

Furthermore, there is a possible use-after-free while iterating, 'node' can be free'd so we need to cache the next value to use.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux7ab87a326f20c52ff4d9972052d085be951c704b < b76db53ee8802ee5683f8cb401d7e2ec6f9b3d56affected
LinuxLinux181859bdfb9734aca449512fccaee4cacce64aed < 899aa5638568abf5d69de7a7bb95e4615157375baffected
LinuxLinux4aacf3d78424293e318c616016865380b37b9cc5 < 3fa13203b6d90cc3a33af47b058739f92ab82eefaffected
LinuxLinux2bf1435fa19d2c58054391b3bba40d5510a5758c < ec5caa765f7f6960011c919c9aeb1467940421f6affected
LinuxLinux318cb24a4c3fce8140afaf84e4d45fcb76fb280b < a836be60a3aabcedcd9c79f545d409ace1f20ba6affected
LinuxLinuxc9e6978e2725a7d4b6cd23b2facd3f11422c0643 < a337706c1fb35aac3f26b48aca80421bdbe1d33aaffected
LinuxLinuxc9e6978e2725a7d4b6cd23b2facd3f11422c0643 < 61ae320a29b0540c16931816299eb86bf2b66c08affected
LinuxLinux5.10.166 < 5.10.181affected
LinuxLinux5.15.91 < 5.15.113affected
LinuxLinux6.1.9 < 6.1.30affected
LinuxLinux6.2affected
LinuxLinux0 < 6.2unaffected
LinuxLinux5.10.181 <= 5.10.*unaffected
LinuxLinux5.15.113 <= 5.15.*unaffected
LinuxLinux6.1.30 <= 6.1.*unaffected
LinuxLinux6.3.4 <= 6.3.*unaffected
LinuxLinux6.4 <= *unaffected

Weaknesses

References