{
  "threat_severity" : "Important",
  "public_date" : "2026-06-24T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: net: pull headers in qdisc_pkt_len_segs_init()",
    "id" : "2492270",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2492270"
  },
  "cvss3" : {
    "cvss3_base_score" : "7.0",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-131",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\nnet: pull headers in qdisc_pkt_len_segs_init()\nMost ndo_start_xmit() methods expects headers of gso packets\nto be already in skb->head.\nnet/core/tso.c users are particularly at risk, because tso_build_hdr()\ndoes a memcpy(hdr, skb->data, hdr_len);\nqdisc_pkt_len_segs_init() already does a dissection of gso packets.\nUse pskb_may_pull() instead of skb_header_pointer() to make\nsure drivers do not have to reimplement this.\nSome malicious packets could be fed, detect them so that we can\ndrop them sooner with a new SKB_DROP_REASON_SKB_BAD_GSO drop_reason.", "A flaw was found in the Linux kernel's handling of Generic Segmentation Offload (GSO) packet headers. This vulnerability occurs when the `qdisc_pkt_len_segs_init()` function does not properly pull headers into the expected memory location, which can lead to incorrect processing by network drivers. A remote attacker could exploit this by sending specially crafted malicious packets, potentially causing a denial of service (DoS) or other unexpected system behavior." ],
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "release_date" : "2026-09-08T00:00:00Z",
    "advisory" : "RHSA-2026:65334",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10.2",
    "package" : "kernel-0:6.12.0-211.53.1.el10_2"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Under investigation",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2026-53091\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-53091\nhttps://lore.kernel.org/linux-cve-announce/2026062409-CVE-2026-53091-cb58@gregkh/T" ],
  "name" : "CVE-2026-53091",
  "csaw" : false
}