CVE-2026-74668 Affecting bpftool package, versions <0:5.15.0-325.220.5.el8uek


Severity

Recommended
high

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.13% (3rd percentile)

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  • Snyk IDSNYK-ORACLE8-BPFTOOL-20649761
  • published8 Oct 2026
  • disclosed22 Aug 2026

Introduced: 22 Aug 2026

CVE-2026-74668  (opens in a new tab)

How to fix?

Upgrade Oracle:8 bpftool to version 0:5.15.0-325.220.5.el8uek or higher.
This issue was patched in ELSA-2026-500377.

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:8 relevant fixed versions and status.

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

packet: use consistent hard_header_len in TX_RING send path

tpacket_snd() reads dev->hard_header_len independently for skb allocation and header construction in tpacket_fill_skb(). Concurrent netdevice reconfiguration can therefore make the reserved headroom smaller than the amount later pushed, or make copylen - hard_header_len negative.

Snapshot hard_header_len once before processing ring frames and use it for the frame limit, headroom allocation, copy length, and skb construction. Pass the snapshot to tpacket_fill_skb().

The separate SOCK_DGRAM consistency problem between hard_header_len and header_ops->create is not addressed here.

CVSS Base Scores

version 3.1