{
  "version": "https://jsonfeed.org/version/1.1",
  "title": "Linux kernel Fragnesia root exploit (CVE-2026-46300) added to CISA KEV, already used in a PHP2Shell firewall campaign · updates",
  "home_page_url": "https://pwn.watch/i/linux-fragnesia-lpe-cve-2026-46300-cisa-kev",
  "feed_url": "https://pwn.watch/i/linux-fragnesia-lpe-cve-2026-46300-cisa-kev/feed.json",
  "description": "CISA added CVE-2026-46300, the Linux kernel local privilege escalation known as Fragnesia, to its Known Exploited Vulnerabilities catalog on Oct 28 based on evidence of active exploitation. The bug is in skb_try_coalesce(), which loses the shared-frag marker when TCP receive coalescing moves paged frags, so IPsec ESP-in-TCP input can decrypt in place over page-cache-backed pages. A low-privileged local user can use it to write bytes into read-only files such as system binaries and gain root. Fragnesia was disclosed on oss-security on May 13 2026 as a Dirty Frag class exploit found by William Bowling with the V12 team, and fixed stable kernels have been out since then. On Oct 27 Dream Research reported a campaign that chained a PHP2Shell exploit with Fragnesia to root 25 servers, including 24 perimeter firewalls.",
  "language": "en",
  "_pwn": {
    "slug": "linux-fragnesia-lpe-cve-2026-46300-cisa-kev",
    "severity": "high",
    "status": "live",
    "patchStatus": "patched",
    "rss": "https://pwn.watch/i/linux-fragnesia-lpe-cve-2026-46300-cisa-kev/feed.xml",
    "llms": "https://pwn.watch/i/linux-fragnesia-lpe-cve-2026-46300-cisa-kev/llms.txt",
    "json": "https://pwn.watch/i/linux-fragnesia-lpe-cve-2026-46300-cisa-kev.json"
  },
  "items": [
    {
      "id": "https://pwn.watch/i/linux-fragnesia-lpe-cve-2026-46300-cisa-kev#2026-10-28-7ed2643e",
      "url": "https://pwn.watch/i/linux-fragnesia-lpe-cve-2026-46300-cisa-kev#2026-10-28-7ed2643e",
      "title": "Linux kernel Fragnesia root exploit (CVE-2026-46300) added to CISA KEV, already used in a PHP2Shell firewall campaign: CISA adds CVE-2026-46300 (Linux Kernel Missing Initialization of a Variable Vulnerability) to the KEV catalog, based on evidence of active exploitation.",
      "content_text": "Linux kernel Fragnesia root exploit (CVE-2026-46300) added to CISA KEV, already used in a PHP2Shell firewall campaign: CISA adds CVE-2026-46300 (Linux Kernel Missing Initialization of a Variable Vulnerability) to the KEV catalog, based on evidence of active exploitation.\n\nSource: https://www.cisa.gov/news-events/alerts/2026/10/28/cisa-adds-two-known-exploited-vulnerabilities-catalog",
      "date_published": "2026-10-28T00:00:00.000Z",
      "external_url": "https://www.cisa.gov/news-events/alerts/2026/10/28/cisa-adds-two-known-exploited-vulnerabilities-catalog",
      "tags": [
        "high"
      ]
    },
    {
      "id": "https://pwn.watch/i/linux-fragnesia-lpe-cve-2026-46300-cisa-kev#2026-10-27-1e18826a",
      "url": "https://pwn.watch/i/linux-fragnesia-lpe-cve-2026-46300-cisa-kev#2026-10-27-1e18826a",
      "title": "Linux kernel Fragnesia root exploit (CVE-2026-46300) added to CISA KEV, already used in a PHP2Shell firewall campaign: Dream Research reports a campaign that chained a custom PHP2Shell exploit with Fragnesia to root 25 servers, 24 of them perimeter firewalls, in the US, Japan, Taiwan and South Korea.",
      "content_text": "Linux kernel Fragnesia root exploit (CVE-2026-46300) added to CISA KEV, already used in a PHP2Shell firewall campaign: Dream Research reports a campaign that chained a custom PHP2Shell exploit with Fragnesia to root 25 servers, 24 of them perimeter firewalls, in the US, Japan, Taiwan and South Korea.\n\nSource: https://dreamgroup.com/blog/chained-php2shell-exploit-roots-25-servers",
      "date_published": "2026-10-27T00:00:00.000Z",
      "external_url": "https://dreamgroup.com/blog/chained-php2shell-exploit-roots-25-servers",
      "tags": [
        "high"
      ]
    },
    {
      "id": "https://pwn.watch/i/linux-fragnesia-lpe-cve-2026-46300-cisa-kev#2026-05-23-1943a98f",
      "url": "https://pwn.watch/i/linux-fragnesia-lpe-cve-2026-46300-cisa-kev#2026-05-23-1943a98f",
      "title": "Linux kernel Fragnesia root exploit (CVE-2026-46300) added to CISA KEV, already used in a PHP2Shell firewall campaign: CVE-2026-46300 is published for the fix \"net: skbuff: preserve shared-frag marker during coalescing\", with backports to the stable kernel branches.",
      "content_text": "Linux kernel Fragnesia root exploit (CVE-2026-46300) added to CISA KEV, already used in a PHP2Shell firewall campaign: CVE-2026-46300 is published for the fix \"net: skbuff: preserve shared-frag marker during coalescing\", with backports to the stable kernel branches.\n\nSource: https://nvd.nist.gov/vuln/detail/CVE-2026-46300",
      "date_published": "2026-05-23T00:00:00.000Z",
      "external_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46300",
      "tags": [
        "high"
      ]
    },
    {
      "id": "https://pwn.watch/i/linux-fragnesia-lpe-cve-2026-46300-cisa-kev#2026-05-13-4accaf8f",
      "url": "https://pwn.watch/i/linux-fragnesia-lpe-cve-2026-46300-cisa-kev#2026-05-13-4accaf8f",
      "title": "Linux kernel Fragnesia root exploit (CVE-2026-46300) added to CISA KEV, already used in a PHP2Shell firewall campaign: Fragnesia is disclosed on the oss-security list as a universal Linux local privilege escalation exploit in the Dirty Frag class, discovered by William Bowling with the V12 team.",
      "content_text": "Linux kernel Fragnesia root exploit (CVE-2026-46300) added to CISA KEV, already used in a PHP2Shell firewall campaign: Fragnesia is disclosed on the oss-security list as a universal Linux local privilege escalation exploit in the Dirty Frag class, discovered by William Bowling with the V12 team.\n\nSource: https://www.openwall.com/lists/oss-security/2026/05/13/5",
      "date_published": "2026-05-13T00:00:00.000Z",
      "external_url": "https://www.openwall.com/lists/oss-security/2026/05/13/5",
      "tags": [
        "high"
      ]
    }
  ]
}