Answer in brief
CVE-2023-53566 records a High severity (CVSS 7.8) vulnerability in netfilter: nft_set_rbtree: fix null deref on element insertion. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2023-53566 records a High severity (CVSS 7.8) vulnerability in netfilter: nft_set_rbtree: fix null deref on element insertion. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.2:-:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.2:rc6:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.2:rc7:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.2:rc8:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.4:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.4:rc2:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=7ab87a326f20c52ff4d9972052d085be951c704b <b76db53ee8802ee5683f8cb401d7e2ec6f9b3d56 || >=181859bdfb9734aca449512fccaee4cacce64aed <899aa5638568abf5d69de7a7bb95e4615157375b || >=4aacf3d78424293e318c616016865380b37b9cc5 <3fa13203b6d90cc3a33af47b058739f92ab82eef || >=2bf1435fa19d2c58054391b3bba40d5510a5758c <ec5caa765f7f6960011c919c9aeb1467940421f6 || >=318cb24a4c3fce8140afaf84e4d45fcb76fb280b <a836be60a3aabcedcd9c79f545d409ace1f20ba6 || >=c9e6978e2725a7d4b6cd23b2facd3f11422c0643 <a337706c1fb35aac3f26b48aca80421bdbe1d33a || >=c9e6978e2725a7d4b6cd23b2facd3f11422c0643 <61ae320a29b0540c16931816299eb86bf2b66c08 || >=5.10.166 <5.10.181 || >=5.15.91 <5.15.113 || >=6.1.9 <6.1.30 | b76db53ee8802ee5683f8cb401d7e2ec6f9b3d56, 899aa5638568abf5d69de7a7bb95e4615157375b, 3fa13203b6d90cc3a33af47b058739f92ab82eef, ec5caa765f7f6960011c919c9aeb1467940421f6, a836be60a3aabcedcd9c79f545d409ace1f20ba6, a337706c1fb35aac3f26b48aca80421bdbe1d33a, 61ae320a29b0540c16931816299eb86bf2b66c08, 5.10.181, 5.15.113, 6.1.30 |
| Linux/Linuxgeneric | 6.2 | Not reported |
Published upstream
Oct 4, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
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.
Quoted source text, attributed separately from HOL analysis.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.2:-:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.2:rc6:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.2:rc7:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.2:rc8:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.4:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.4:rc2:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=7ab87a326f20c52ff4d9972052d085be951c704b <b76db53ee8802ee5683f8cb401d7e2ec6f9b3d56 || >=181859bdfb9734aca449512fccaee4cacce64aed <899aa5638568abf5d69de7a7bb95e4615157375b || >=4aacf3d78424293e318c616016865380b37b9cc5 <3fa13203b6d90cc3a33af47b058739f92ab82eef || >=2bf1435fa19d2c58054391b3bba40d5510a5758c <ec5caa765f7f6960011c919c9aeb1467940421f6 || >=318cb24a4c3fce8140afaf84e4d45fcb76fb280b <a836be60a3aabcedcd9c79f545d409ace1f20ba6 || >=c9e6978e2725a7d4b6cd23b2facd3f11422c0643 <a337706c1fb35aac3f26b48aca80421bdbe1d33a || >=c9e6978e2725a7d4b6cd23b2facd3f11422c0643 <61ae320a29b0540c16931816299eb86bf2b66c08 || >=5.10.166 <5.10.181 || >=5.15.91 <5.15.113 || >=6.1.9 <6.1.30 | b76db53ee8802ee5683f8cb401d7e2ec6f9b3d56, 899aa5638568abf5d69de7a7bb95e4615157375b, 3fa13203b6d90cc3a33af47b058739f92ab82eef, ec5caa765f7f6960011c919c9aeb1467940421f6, a836be60a3aabcedcd9c79f545d409ace1f20ba6, a337706c1fb35aac3f26b48aca80421bdbe1d33a, 61ae320a29b0540c16931816299eb86bf2b66c08, 5.10.181, 5.15.113, 6.1.30 |
| Linux/Linuxgeneric | 6.2 | Not reported |
Published upstream
Oct 4, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
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.
Quoted source text, attributed separately from HOL analysis.