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CVE-2026-23456: linux kernel from 2.6.17 (inclusive), before 5.10.253 (exclusive), from 5.11 (inclusive), before 5.15.203 (exclusive)…
CVE-2026-23456. CVSS 3.1 base score 8.2 (HIGH, Source advisory). EPSS 0.00523 (percentile 0.42945), scored 14-Oct-2026.
Affected technology
linux kernel · from 2.6.17 (inclusive), before 5.10.253 (exclusive)
linux
linux kernel · from 5.11 (inclusive), before 5.15.203 (exclusive)
linux
linux kernel · from 5.16 (inclusive), before 6.1.167 (exclusive)
linux
linux kernel · from 6.2 (inclusive), before 6.6.130 (exclusive)
linux
linux kernel · from 6.7 (inclusive), before 6.12.78 (exclusive)
linux
linux kernel · from 6.13 (inclusive), before 6.18.20 (exclusive)
linux
linux kernel · from 6.19 (inclusive), before 6.19.10 (exclusive)
linux
linux kernel · 7.0 · update rc1
linux
linux kernel · 7.0 · update rc2
linux
linux kernel · 7.0 · update rc3
linux
linux kernel · 7.0 · update rc4
linux
Linux · 5e35941d990123f155b02d5663e51a24f816b6f3 to before a2cd54b9348e485d338b3c132338a4410c99afaf, 5e35941d990123f155b02d5663e51a24f816b6f3 to before c95dc674ebf01ecfb40388b6facfc89b81fed3b7, 5e35941d990123f155b02d5663e51a24f816b6f3 to before 41b417ff73a24b2c68134992cc44c88db27f482d, 5e35941d990123f155b02d5663e51a24f816b6f3 to before 52235bf88159a1ef16434ab49e47e99c8a09ab20, 5e35941d990123f155b02d5663e51a24f816b6f3 to before 774a434f8c9c8602a976b2536f65d0172a07f4d2, 5e35941d990123f155b02d5663e51a24f816b6f3 to before 6bce72daeccca9aa1746e92d6c3d4784e71f2ebb, 5e35941d990123f155b02d5663e51a24f816b6f3 to before fb6c3596823ec5dd09c2123340330d7448f51a59, 5e35941d990123f155b02d5663e51a24f816b6f3 to before 1e3a3593162c96e8a8de48b1e14f60c3b57fca8a
Linux
Linux · 2.6.17
Linux
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP · V3.1.6 to before *
Siemens
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP · V3.1.5 to before *
Siemens
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP · V3.1.7 to before *
Siemens
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP · V3.1.6 to before *
Siemens
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP · V3.1.5 to before *
Siemens
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP · V3.1.7 to before *
Siemens
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP · V3.1.6 to before *
Siemens
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP · V3.1.5 to before *
Siemens
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP · V3.1.7 to before *
Siemens
Component: Not specified by the source
File: net/netfilter/nf_conntrack_h323_asn1.c
Attack conditions (Source advisory, CVSS 3.1): Network (remote) · No privileges required · No user interaction required
What an attacker can do
Source advisory’s CVSS 3.1 assessment (base score 8.2/10) rates confidentiality impact as low; integrity impact as none; availability impact as high. The description does not specify what an attacker can achieve beyond these rated impacts.
- CWE
- CWE-125
- CCR priority
- 32.9 /100 (P4)
- CVSS 3.1
- 8.2 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H · Source advisory
- EPSS
- 0.00523 · percentile 0.42945 · 2026-10-14
- KEV
- no
Provenance
- FIRST EPSS daily exploit-probability · Source record · observed 2026-10-15 09:24:28.011626+00:00 UTC
- GitHub Advisory Database · Source record · observed 2026-10-15 10:43:56.988652+00:00 UTC
- NVD CVE API 2.0 · Source record · observed 2026-10-15 09:18:22.406219+00:00 UTC
Stable permalink: https://cybercodered.org/item/cve-cve-2026-23456.html