CVE-2026-99999 Affecting bpftool package, versions <0:5.15.0-325.221.6.4.el9uek


Severity

Recommended
high

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.21% (11th percentile)

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  • Snyk IDSNYK-ORACLE9-BPFTOOL-21175759
  • published17 Oct 2026
  • disclosed15 Oct 2026

Introduced: 15 Oct 2026

NewCVE-2026-99999  (opens in a new tab)

How to fix?

Upgrade Oracle:9 bpftool to version 0:5.15.0-325.221.6.4.el9uek or higher.
This issue was patched in ELSA-2026-500398.

NVD Description

Note: Versions mentioned in the description apply only to the upstream bpftool package and not the bpftool package as distributed by Oracle. See How to fix? for Oracle:9 relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

ipv4: validate checksum_start before completing checksum

If a packet with bad checksum metadata gets into the ipv4 stack, skb_checksum_help can corrupt the network header and cause a bunch of mischief.

This was discovered and reported by Paulos, and has been reporoduced by others independently since.

We really shouldn't allow such packets in, but as a defence in depth measure, let's also check before we complete the checksum.

A more complete validation at input is forthcoming, but needs more work.

CVSS Base Scores

version 3.1