5.5

CVE-2023-53566

netfilter: nft_set_rbtree: fix null deref on element insertion

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 5.10.166 < 5.10.181
Linux ≫ Linux Kernel Version >= 5.15.91 < 5.15.113
Linux ≫ Linux Kernel Version >= 6.1.9 < 6.1.30
Linux ≫ Linux Kernel Version >= 6.2.1 < 6.3.4
Linux ≫ Linux Kernel Version6.2 Update-
Linux ≫ Linux Kernel Version6.2 Updaterc6
Linux ≫ Linux Kernel Version6.2 Updaterc7
Linux ≫ Linux Kernel Version6.2 Updaterc8
Linux ≫ Linux Kernel Version6.4 Updaterc1
Linux ≫ Linux Kernel Version6.4 Updaterc2
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.02% 0.042
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-476 NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.