جزئیات آسیب‌پذیری

In the Linux kernel, the following vulnerability has been resolved: net: pull headers in qdisc_pkt_len_segs_init() Most ndo_start_xmit() methods expects headers of gso packets to be already in skb->head. net/core/tso.c users are particularly at risk, because tso_build_hdr() does a memcpy(hdr, skb->data, hdr_len); qdisc_pkt_len_segs_init() already does a dissection of gso packets. Use pskb_may_pull() instead of skb_header_pointer() to make sure drivers do not have to reimplement this. Some malicious packets could be fed, detect them so that we can drop them sooner with a new SKB_DROP_REASON_SKB_BAD_GSO drop_reason.

• https://git.kernel.org/stable/c/5895cfc76924a629c6eaa5e5f049de642860045f
• https://git.kernel.org/stable/c/7564dc804d8289d2e5c6edb8173754051b71bff4
• https://git.kernel.org/stable/c/9d4f5c68f5ad4ab425f3ce1500c97c9f9743999a
• https://git.kernel.org/stable/c/7fb4c19670110f052c04e1ec1d2b953b9f4f57e4
• https://access.redhat.com/security/cve/CVE-2026-53091 vdb-entryx_refsource_REDHAT
• https://bugzilla.redhat.com/show_bug.cgi?id=2492270 issue-trackingx_refsource_REDHAT
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53091.json x_sadp-csaf-vex
• https://access.redhat.com/errata/RHSA-2026:65334 vendor-advisoryx_refsource_REDHAT
• https://access.redhat.com/errata/RHSA-2026:67150 vendor-advisoryx_refsource_REDHAT
• https://access.redhat.com/errata/RHSA-2026:66325 vendor-advisoryx_refsource_REDHAT
• https://access.redhat.com/errata/RHSA-2026:66324 vendor-advisoryx_refsource_REDHAT