Linux kernel Fragnesia root exploit (CVE-2026-46300) added to CISA KEV, already used in a PHP2Shell firewall campaign ยท updates https://pwn.watch/i/linux-fragnesia-lpe-cve-2026-46300-cisa-kev 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. en Wed, 28 Oct 2026 00:00:00 GMT 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. https://pwn.watch/i/linux-fragnesia-lpe-cve-2026-46300-cisa-kev https://pwn.watch/i/linux-fragnesia-lpe-cve-2026-46300-cisa-kev#2026-10-28-7ed2643e Wed, 28 Oct 2026 00:00:00 GMT high <p><a href="https://www.cisa.gov/news-events/alerts/2026/10/28/cisa-adds-two-known-exploited-vulnerabilities-catalog">Source</a></p> 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. https://pwn.watch/i/linux-fragnesia-lpe-cve-2026-46300-cisa-kev https://pwn.watch/i/linux-fragnesia-lpe-cve-2026-46300-cisa-kev#2026-10-27-1e18826a Tue, 27 Oct 2026 00:00:00 GMT high <p><a href="https://dreamgroup.com/blog/chained-php2shell-exploit-roots-25-servers">Source</a></p> 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. https://pwn.watch/i/linux-fragnesia-lpe-cve-2026-46300-cisa-kev https://pwn.watch/i/linux-fragnesia-lpe-cve-2026-46300-cisa-kev#2026-05-23-1943a98f Sat, 23 May 2026 00:00:00 GMT high <p><a href="https://nvd.nist.gov/vuln/detail/CVE-2026-46300">Source</a></p> 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. https://pwn.watch/i/linux-fragnesia-lpe-cve-2026-46300-cisa-kev https://pwn.watch/i/linux-fragnesia-lpe-cve-2026-46300-cisa-kev#2026-05-13-4accaf8f Wed, 13 May 2026 00:00:00 GMT high <p><a href="https://www.openwall.com/lists/oss-security/2026/05/13/5">Source</a></p>