CVE-2023-53566netfilter: nft_set_rbtree: fix null deref on element insertion
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
Linux Linux linux:linux (from the name) | from 7ab87a326f20c52ff4d9972052d085be951c704b before b76db53ee8802ee5683f8cb401d7e2ec6f9b3d56; 181859bdfb9734aca449512fccaee4cacce64aed builds before 899aa5638568abf5d69de7a7bb95e4615157375b; 4aacf3d78424293e318c616016865380b37b9cc5 builds before 3fa13203b6d90cc3a33af47b058739f92ab82eef; from 2bf1435fa19d2c58054391b3bba40d5510a5758c before ec5caa765f7f6960011c919c9aeb1467940421f6; from 318cb24a4c3fce8140afaf84e4d45fcb76fb280b before a836be60a3aabcedcd9c79f545d409ace1f20ba6; from c9e6978e2725a7d4b6cd23b2facd3f11422c0643 before a337706c1fb35aac3f26b48aca80421bdbe1d33a; from c9e6978e2725a7d4b6cd23b2facd3f11422c0643 before 61ae320a29b0540c16931816299eb86bf2b66c08; from 5.10.166 before 5.10.181; and 2 more ranges | CNA record |
linux linux_kernel linux:linux_kernel | from 5.10.166 before 5.10.181; from 5.15.91 before 5.15.113; from 6.1.9 before 6.1.30; from 6.2.1 before 6.3.4; 6.2; 6.2; 6.2; 6.2; and 2 more ranges | NVD |
References
- https://git.kernel.org/stable/c/b76db53ee8802ee5683f8cb401d7e2ec6f9b3d56patch
- https://git.kernel.org/stable/c/899aa5638568abf5d69de7a7bb95e4615157375bpatch
- https://git.kernel.org/stable/c/3fa13203b6d90cc3a33af47b058739f92ab82eefpatch
- https://git.kernel.org/stable/c/ec5caa765f7f6960011c919c9aeb1467940421f6patch
- https://git.kernel.org/stable/c/a836be60a3aabcedcd9c79f545d409ace1f20ba6patch
- https://git.kernel.org/stable/c/a337706c1fb35aac3f26b48aca80421bdbe1d33apatch
- https://git.kernel.org/stable/c/61ae320a29b0540c16931816299eb86bf2b66c08patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.