Medium 5.9Published Oct 30, 2026

CVE-2026-118593Kernel: local_bh imbalance in seg6_input_core() drop path (incomplete fix for cve-2026-46099)

Updated under an hour ago (Oct 30, 2026, 4:40 AM ET)

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It affects Red Hat Enterprise Linux 10 and 1 other product. 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 Red Hat Enterprise Linux 9 kernel builds. An incomplete backport of the CVE-2026-46099 fix in RHEL 9.6 through 9.10 left a local_bh imbalance in seg6_input_core(), where the drop path returns with bottom halves still disabled. This can lead to softirq starvation and denial of service on systems with SRv6 tunnels configured. Upstream and RHEL 10 are not affected.

CVSS: 5.9 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-667
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: Awaiting Analysis
Record last updated: Oct 30, 2026
First seen by InfoSec Signals: Oct 30, 2026

Affected products

Affected products

Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux	10	CNA record
Red Hat Red Hat OpenShift Container Platform 4 redhat:openshift	4	CNA record

References

References

https://access.redhat.com/security/cve/CVE-2026-118593	vdb-entry, x-refsource-redhat
https://bugzilla.redhat.com/show_bug.cgi?id=2563095	issue-tracking, x-refsource-redhat

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.