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High 7.0Published Sep 25, 2023
CVE-2023-42753Kernel: netfilter: potential slab-out-of-bound access due to integer underflow
Updated under an hour ago ()
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It affects Red Hat Enterprise Linux 7 and 9 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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An array indexing vulnerability was found in the netfilter subsystem of the Linux kernel. A missing macro could lead to a miscalculation of the `h->nets` array offset, providing attackers with the primitive to arbitrarily increment/decrement a memory buffer out-of-bound. This issue may allow a local user to crash the system or potentially escalate their privileges on the system.
- CVSS
- 7.0 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-787
- 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 15, 2026
Affected products
Red Hat Red Hat Enterprise Linux 7 redhat:rhel_extras_rt | from 0:3.10.0-1160.108.1.rt56.1259.el7 not affected | CNA record |
Red Hat Red Hat Enterprise Linux 7 redhat:enterprise_linux | from 0:3.10.0-1160.108.1.el7 not affected | CNA record |
Red Hat Red Hat Enterprise Linux 7.7 Advanced Update Support redhat:rhel_aus | from 0:3.10.0-1062.85.1.el7 not affected | CNA record |
Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support redhat:rhel_e4s | from 0:4.18.0-193.120.1.el8_2 not affected | CNA record |
Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support redhat:rhel_tus | from 0:4.18.0-193.120.1.el8_2 not affected | CNA record |
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support redhat:rhel_eus | 8.6 | CNA record |
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support redhat:rhev_hypervisor | from 0:4.18.0-372.87.1.el8_6 not affected | CNA record |
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 |
linux linux_kernel linux:linux_kernel | from 4.4.165 before 4.5; from 4.9.141 before 4.10; from 4.14.84 before 4.15; from 4.19.5 before 4.19.295; from 4.20 before 5.4.257; from 5.5 before 5.10.195; from 5.11 before 5.15.132; from 5.16 before 6.1.53; and 2 more ranges | NVD |
redhat enterprise_linux redhat:enterprise_linux | 7.0; 8.0; 9.0 | NVD |
debian debian_linux debian:debian_linux | 10.0 | NVD |
References
- https://access.redhat.com/errata/RHSA-2023:7370vendor-advisory, x-refsource-redhat, third-party-advisory
- https://access.redhat.com/errata/RHSA-2023:7379vendor-advisory, x-refsource-redhat, third-party-advisory
- https://access.redhat.com/errata/RHSA-2023:7382vendor-advisory, x-refsource-redhat, third-party-advisory
- https://access.redhat.com/errata/RHSA-2023:7389vendor-advisory, x-refsource-redhat, third-party-advisory
- https://access.redhat.com/errata/RHSA-2023:7411vendor-advisory, x-refsource-redhat, third-party-advisory
- https://access.redhat.com/errata/RHSA-2023:7418vendor-advisory, x-refsource-redhat, third-party-advisory
- https://access.redhat.com/errata/RHSA-2023:7539vendor-advisory, x-refsource-redhat, third-party-advisory
- https://access.redhat.com/errata/RHSA-2023:7558vendor-advisory, x-refsource-redhat, third-party-advisory
- https://access.redhat.com/errata/RHSA-2024:0089vendor-advisory, x-refsource-redhat, third-party-advisory
- https://access.redhat.com/errata/RHSA-2024:0113vendor-advisory, x-refsource-redhat, third-party-advisory
- https://access.redhat.com/errata/RHSA-2024:0134vendor-advisory, x-refsource-redhat, third-party-advisory
- https://access.redhat.com/errata/RHSA-2024:0340vendor-advisory, x-refsource-redhat, third-party-advisory
- https://access.redhat.com/errata/RHSA-2024:0346vendor-advisory, x-refsource-redhat, third-party-advisory
- https://access.redhat.com/errata/RHSA-2024:0347vendor-advisory, x-refsource-redhat, third-party-advisory
- https://access.redhat.com/errata/RHSA-2024:0371vendor-advisory, x-refsource-redhat, third-party-advisory
- https://access.redhat.com/errata/RHSA-2024:0376vendor-advisory, x-refsource-redhat, third-party-advisory
- https://access.redhat.com/errata/RHSA-2024:0378vendor-advisory, x-refsource-redhat, third-party-advisory
- https://access.redhat.com/errata/RHSA-2024:0402vendor-advisory, x-refsource-redhat, third-party-advisory
- https://access.redhat.com/errata/RHSA-2024:0403vendor-advisory, x-refsource-redhat, third-party-advisory
- https://access.redhat.com/errata/RHSA-2024:0412vendor-advisory, x-refsource-redhat, third-party-advisory
- https://access.redhat.com/errata/RHSA-2024:0461vendor-advisory, x-refsource-redhat, third-party-advisory
- https://access.redhat.com/errata/RHSA-2024:0562vendor-advisory, x-refsource-redhat, third-party-advisory
- https://access.redhat.com/errata/RHSA-2024:0563vendor-advisory, x-refsource-redhat, third-party-advisory
- https://access.redhat.com/errata/RHSA-2024:0593vendor-advisory, x-refsource-redhat, third-party-advisory
- https://access.redhat.com/errata/RHSA-2024:0999vendor-advisory, x-refsource-redhat, third-party-advisory
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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.