CVE-2023-39193Kernel: netfilter: xtables sctp out-of-bounds read in match_flags()
Updated under an hour ago ()
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It affects Red Hat Enterprise Linux 8 and 6 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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A flaw was found in the Netfilter subsystem in the Linux kernel. The sctp_mt_check did not validate the flag_count field. This flaw allows a local privileged (CAP_NET_ADMIN) attacker to trigger an out-of-bounds read, leading to a crash or information disclosure.
- CVSS
- 6.1 MEDIUM (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L
- Weakness (CWE)
- CWE-125
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- redhat
- NVD analysis
- Modified
- Record last updated
- Oct 14, 2026
- First seen by InfoSec Signals
- Oct 14, 2026
Affected products
Red Hat Red Hat Enterprise Linux 8 redhat:enterprise_linux | from 0:4.18.0-553.rt7.342.el8_10 not affected | CNA record |
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.0 before V3.1.5 | CISA ADP |
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name) | from V3.1.0 before V3.1.5 | CISA ADP |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | before V1.1 | CISA ADP |
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.0 before V3.1.5 | CISA ADP |
linux linux_kernel linux:linux_kernel | before 6.6 | NVD |
redhat enterprise_linux redhat:enterprise_linux | 8.0; 9.0 | NVD |
fedoraproject fedora fedoraproject:fedora | 38 | NVD |
References
- https://access.redhat.com/errata/RHSA-2024:2394vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2024:2950vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2024:3138vendor-advisory, x-refsource-redhat
- https://access.redhat.com/security/cve/CVE-2023-39193vdb-entry, x-refsource-redhat, third-party-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2226787issue-tracking, x-refsource-redhat, patch, third-party-advisory
- https://www.zerodayinitiative.com/advisories/ZDI-CAN-18866/patch, third-party-advisory, vdb-entry
- https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
- https://cert-portal.siemens.com/productcert/html/ssa-769027.html
- https://cert-portal.siemens.com/productcert/html/ssa-794697.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.