Vulnerability-Lookup

FKIE_CVE-2023-53566

Vulnerability from fkie_nvd - Published: 2025-10-04 16:15 - Updated: 2026-02-06 14:32

Severity ?

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3fa13203b6d90cc3a33af47b058739f92ab82eef	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/61ae320a29b0540c16931816299eb86bf2b66c08	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/899aa5638568abf5d69de7a7bb95e4615157375b	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a337706c1fb35aac3f26b48aca80421bdbe1d33a	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a836be60a3aabcedcd9c79f545d409ace1f20ba6	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b76db53ee8802ee5683f8cb401d7e2ec6f9b3d56	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ec5caa765f7f6960011c919c9aeb1467940421f6	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	6.2
linux	linux_kernel	6.2
linux	linux_kernel	6.2
linux	linux_kernel	6.2
linux	linux_kernel	6.4
linux	linux_kernel	6.4

JSON

To clipboard

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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nft_set_rbtree: fix null deref on element insertion\n\nThere is no guarantee that rb_prev() will not return NULL in nft_rbtree_gc_elem():\n\ngeneral protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN\nKASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]\n nft_add_set_elem+0x14b0/0x2990\n  nf_tables_newsetelem+0x528/0xb30\n\nFurthermore, there is a possible use-after-free while iterating,\n\u0027node\u0027 can be free\u0027d so we need to cache the next value to use."
    }
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          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
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          "version": "3.1"
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        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  "published": "2025-10-04T16:15:52.103",
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}

CVE-2023-53566 (GCVE-0-2023-53566)

Vulnerability from cvelistv5 – Published: 2025-10-04 15:17 – Updated: 2025-10-04 15:17

Title

netfilter: nft_set_rbtree: fix null deref on element insertion

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/b76db53ee8802ee56…
	https://git.kernel.org/stable/c/899aa5638568abf5d…
	https://git.kernel.org/stable/c/3fa13203b6d90cc3a…
	https://git.kernel.org/stable/c/ec5caa765f7f69600…
	https://git.kernel.org/stable/c/a836be60a3aabcedc…
	https://git.kernel.org/stable/c/a337706c1fb35aac3…
	https://git.kernel.org/stable/c/61ae320a29b0540c1…

Impacted products

Vendor

Product

Version

Linux

Affected: 7ab87a326f20c52ff4d9972052d085be951c704b , < b76db53ee8802ee5683f8cb401d7e2ec6f9b3d56 (git)
Affected: 181859bdfb9734aca449512fccaee4cacce64aed , < 899aa5638568abf5d69de7a7bb95e4615157375b (git)
Affected: 4aacf3d78424293e318c616016865380b37b9cc5 , < 3fa13203b6d90cc3a33af47b058739f92ab82eef (git)
Affected: 2bf1435fa19d2c58054391b3bba40d5510a5758c , < ec5caa765f7f6960011c919c9aeb1467940421f6 (git)
Affected: 318cb24a4c3fce8140afaf84e4d45fcb76fb280b , < a836be60a3aabcedcd9c79f545d409ace1f20ba6 (git)
Affected: c9e6978e2725a7d4b6cd23b2facd3f11422c0643 , < a337706c1fb35aac3f26b48aca80421bdbe1d33a (git)
Affected: c9e6978e2725a7d4b6cd23b2facd3f11422c0643 , < 61ae320a29b0540c16931816299eb86bf2b66c08 (git)

Linux

Affected: 6.2
Unaffected: 0 , < 6.2 (semver)
Unaffected: 5.10.181 , ≤ 5.10.* (semver)
Unaffected: 5.15.113 , ≤ 5.15.* (semver)
Unaffected: 6.1.30 , ≤ 6.1.* (semver)
Unaffected: 6.3.4 , ≤ 6.3.* (semver)
Unaffected: 6.4 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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          "programFiles": [
            "net/netfilter/nft_set_rbtree.c"
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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2023-53566

CVE-2023-53566 (GCVE-0-2023-53566)

Tags

Sightings

Nomenclature