RHSA-2026:83540 | Vulnetix

RHSA-2026:83540 PUBLISHED CVSS 7.300000190734863 HIGH

Record from redhat · Published October 20, 2026

A flaw was found in the Linux kernel's PPPoE (Point-to-Point Protocol over Ethernet) implementation. This vulnerability occurs because a pointer to network packet data is not updated after memory is reallocated, leading to the use of an outdated memory address. An attacker with local access could potentially trigger this condition, causing memory corruption. This could result in a system crash (denial of service) or other unpredictable system behavior.

Risk scores

CVSS 3.1

7.300000190734863

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H

Affected products

Vendor	Product	Versions
Red Hat	rhcos-x86_64-4.22.9.8.202610130742-0 as a component of Red Hat OpenShift Container Platform 4.22	4.22.9.8.202610130742-0
Red Hat	rhcos-aarch64-4.22.9.8.202610130742-0 as a component of Red Hat OpenShift Container Platform 4.22	4.22.9.8.202610130742-0
Red Hat	rhcos-s390x-4.22.9.8.202610130742-0 as a component of Red Hat OpenShift Container Platform 4.22	4.22.9.8.202610130742-0
Red Hat	rhcos-ppc64le-4.22.9.8.202610130742-0 as a component of Red Hat OpenShift Container Platform 4.22	4.22.9.8.202610130742-0

Timeline

Oct 20, 2026 CVE Published
Oct 21, 2026 CVE Updated
Oct 21, 2026 Distribution Patch (2 in total, the first dated here)
Oct 21, 2026 Security Advisory (2 in total, the first dated here)

Query this with the API

The same record, from the CLI:

vulnetix vdb vuln RHSA-2026:83540
vulnetix vdb fixes RHSA-2026:83540

Or with curl, using the org id and key from your account page:

curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
  "https://api.vdb.vulnetix.com/v2/vuln/RHSA-2026%3A83540/fixes/registry"

The Community plan is free and allows 50 queries a day. Get a free API key · API quickstart

References

Look up in the Resolve Platform →