01 Record

CVE-2023-53566

netfilter: nft_set_rbtree: fix null deref on element insertion

HighPUBLISHEDCNA: Linux

CNA base score7.8 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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02 Description

netfilter: nft_set_rbtree: fix null deref on element insertion

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.15% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 4.1% of scored records. A rank, not a probability.

NVD base score

5.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-10-15.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2025-10-04 15:17Z1 YR AGO

Last updated

2026-10-15 21:41Z13 DAYS AGO

Reserved

2025-10-04

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 7.8)

CNA CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-476NULL Pointer DereferenceBase

Data version

5.2

Document digest

4242927a6235bd1d02a383c70165fc38b720d2fbe8f1f0cb87ea7dacfd83388b

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux7ab87a326f20c52ff4d9972052d085be951c704b to < b76db53ee8802ee5683f8cb401d7e2ec6f9b3d56, 181859bdfb9734aca449512fccaee4cacce64aed to < 899aa5638568abf5d69de7a7bb95e4615157375b, 4aacf3d78424293e318c616016865380b37b9cc5 to < 3fa13203b6d90cc3a33af47b058739f92ab82eef, 2bf1435fa19d2c58054391b3bba40d5510a5758c to < ec5caa765f7f6960011c919c9aeb1467940421f6, 318cb24a4c3fce8140afaf84e4d45fcb76fb280b to < a836be60a3aabcedcd9c79f545d409ace1f20ba6, c9e6978e2725a7d4b6cd23b2facd3f11422c0643 to < a337706c1fb35aac3f26b48aca80421bdbe1d33a, c9e6978e2725a7d4b6cd23b2facd3f11422c0643 to < 61ae320a29b0540c16931816299eb86bf2b66c08, 5.10.166 to < 5.10.181, 5.15.91 to < 5.15.113, 6.1.9 to < 6.1.30, 6.2—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/b76db53ee8802ee5683f8cb401d7e2ec6f9b3d56
git.kernel.orghttps://git.kernel.org/stable/c/899aa5638568abf5d69de7a7bb95e4615157375b
git.kernel.orghttps://git.kernel.org/stable/c/3fa13203b6d90cc3a33af47b058739f92ab82eef
git.kernel.orghttps://git.kernel.org/stable/c/ec5caa765f7f6960011c919c9aeb1467940421f6
git.kernel.orghttps://git.kernel.org/stable/c/a836be60a3aabcedcd9c79f545d409ace1f20ba6
git.kernel.orghttps://git.kernel.org/stable/c/a337706c1fb35aac3f26b48aca80421bdbe1d33a
git.kernel.orghttps://git.kernel.org/stable/c/61ae320a29b0540c16931816299eb86bf2b66c08

07 Fixed in

Debian 12

linux
Fixed in 6.1.37-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

linux
Fixed in 6.3.7-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

linux
Fixed in 6.3.7-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.