{"apiVersion":"1.0","identifier":"CVE-2026-72057","description":"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().","publishedAt":"2026-08-15T06:21:15","lastModifiedAt":"2026-08-23T13:16:38","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-72057","cvssScore":8.2,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","epssProbability":0.00585,"riskScore":0.86,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-72057","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-72057","en":"https://www.redsauce.net/en/cves/CVE-2026-72057","fr":"https://www.redsauce.net/fr/cves/CVE-2026-72057","pt":"https://www.redsauce.net/pt/cves/CVE-2026-72057","de":"https://www.redsauce.net/de/cves/CVE-2026-72057","sk":"https://www.redsauce.net/sk/cves/CVE-2026-72057","el":"https://www.redsauce.net/el/cves/CVE-2026-72057"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-72057"}}