VDB
RHSA-2026:84677
RHSA-2026:84677
PUBLISHED
CVSS 7 HIGH
A flaw was found in the Linux kernel's `nfnetlink_cthelper` component. This vulnerability, an out-of-bounds read, occurs in the `nfnl_cthelper_dump_table()` function when a network connection tracking helper is removed during a dump operation, leading to a bypassed bounds check. A local attacker could exploit this to cause a system crash (denial of service) or potentially access sensitive information from kernel memory.
Risk Scores
CVSS 3.1
7
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | python3-perf-0:4.18.0-305.214.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4) | 0:4.18.0-305.214.1.el8_4 |
| Red Hat | kernel-tools-debuginfo-0:4.18.0-305.214.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) | 0:4.18.0-305.214.1.el8_4 |
| Red Hat | kernel-debug-devel-0:4.18.0-305.214.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) | 0:4.18.0-305.214.1.el8_4 |
| Red Hat | kernel-modules-extra-0:4.18.0-305.214.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) | 0:4.18.0-305.214.1.el8_4 |
| Red Hat | kernel-tools-0:4.18.0-305.214.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4) | 0:4.18.0-305.214.1.el8_4 |
| Red Hat | bpftool-debuginfo-0:4.18.0-305.214.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4) | 0:4.18.0-305.214.1.el8_4 |
| Red Hat | kernel-debug-0:4.18.0-305.214.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4) | 0:4.18.0-305.214.1.el8_4 |
| Red Hat | perf-debuginfo-0:4.18.0-305.214.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) | 0:4.18.0-305.214.1.el8_4 |
| Red Hat | kernel-debuginfo-0:4.18.0-305.214.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) | 0:4.18.0-305.214.1.el8_4 |
| Red Hat | bpftool-0:4.18.0-305.214.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) | 0:4.18.0-305.214.1.el8_4 |
| Red Hat | kernel-debug-debuginfo-0:4.18.0-305.214.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4) | 0:4.18.0-305.214.1.el8_4 |
| Red Hat | kernel-tools-libs-0:4.18.0-305.214.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4) | 0:4.18.0-305.214.1.el8_4 |
| Red Hat | kernel-0:4.18.0-305.214.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4) | 0:4.18.0-305.214.1.el8_4 |
| Red Hat | bpftool-debuginfo-0:4.18.0-305.214.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) | 0:4.18.0-305.214.1.el8_4 |
| Red Hat | kernel-tools-debuginfo-0:4.18.0-305.214.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4) | 0:4.18.0-305.214.1.el8_4 |
| Red Hat | kernel-modules-extra-0:4.18.0-305.214.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4) | 0:4.18.0-305.214.1.el8_4 |
| Red Hat | kernel-debuginfo-common-x86_64-0:4.18.0-305.214.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4) | 0:4.18.0-305.214.1.el8_4 |
| Red Hat | kernel-abi-stablelists-0:4.18.0-305.214.1.el8_4.noarch as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4) | 0:4.18.0-305.214.1.el8_4 |
| Red Hat | kernel-debug-modules-0:4.18.0-305.214.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4) | 0:4.18.0-305.214.1.el8_4 |
| Red Hat | python3-perf-0:4.18.0-305.214.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) | 0:4.18.0-305.214.1.el8_4 |
…and 31 more
Timeline
- Oct 19, 2026 CVE Published
- Oct 30, 2026 CVE Updated
- Oct 30, 2026 Distribution Patch
- Oct 30, 2026 Distribution Patch
- Oct 30, 2026 Security Advisory
- Oct 30, 2026 Security Advisory
- Oct 30, 2026 Security Advisory
- Oct 30, 2026 Security Advisory
- Oct 30, 2026 Security Advisory
- Oct 30, 2026 Security Advisory
References
- https://access.redhat.com/errata/RHSA-2026:84677 advisory
- https://access.redhat.com/security/updates/classification/#important advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2468228 issue
- https://bugzilla.redhat.com/show_bug.cgi?id=2482566 issue
- https://bugzilla.redhat.com/show_bug.cgi?id=2502326 issue
- https://bugzilla.redhat.com/show_bug.cgi?id=2502327 issue
- https://bugzilla.redhat.com/show_bug.cgi?id=2502330 issue
- https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_84677.json advisory
- https://access.redhat.com/security/cve/CVE-2026-43450 advisory
- https://www.cve.org/CVERecord?id=CVE-2026-43450 advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-43450 advisory
- https://lore.kernel.org/linux-cve-announce/2026050857-CVE-2026-43450-8919@gregkh/T advisory
- https://access.redhat.com/security/cve/CVE-2026-46149 advisory
- https://www.cve.org/CVERecord?id=CVE-2026-46149 advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-46149 advisory
- https://lore.kernel.org/linux-cve-announce/2026052822-CVE-2026-46149-ad2e@gregkh/T advisory
- https://access.redhat.com/security/cve/CVE-2026-63920 advisory
- https://www.cve.org/CVERecord?id=CVE-2026-63920 advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-63920 advisory
- https://lore.kernel.org/linux-cve-announce/2026071948-CVE-2026-63920-54a7@gregkh/T advisory
…and 8 more