CVE-2026-72057

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-72057

Key Details

CVE	CVE-2026-72057
CVSS Score / Version	8.2 (High) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H`
CVSS Prose	attack vector is network; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is none; integrity impact is low; availability impact is high.
Affected products	Linux Kernel

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

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

net/sched: act_ct: preserve tc_skb_cb across defragmentation

tcf_ct_handle_fragments() calls nf_ct_handle_fragments() without saving

and restoring skb->cb. The defrag helper clears IPCB/IP6CB, which aliases

the tc_skb_cb/qdisc_skb_cb control buffer. Fragmented traffic through

act_ct therefore loses qdisc metadata such as pkt_segs and can trigger

WARN_ON_ONCE() in qdisc_pkt_segs() when panic_on_warn is enabled.

Save and restore the full tc_skb_cb around nf_ct_handle_fragments(),

matching the pattern used by ovs_ct_handle_fragments(). (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-72057
CVE	https://www.cve.org/CVERecord?id=CVE-2026-72057

Source

Reference

NVD

CVE