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[ CVE-2026-68121 · Published 10 Aug 2026 ]

Vulnerability in Linux

CVSS 7.8 EPSS <1%6 agency advisoriesFix available

[ Why it matters ]Priority signals

  • Interim mitigation published by PrivacySafe

[ Description ]Official description

In the Linux kernel, the following vulnerability has been resolved: pppoe: reload header pointer after dev_hard_header() pppoe_sendmsg() saves a pointer to the PPPoE header before calling dev_hard_header(). Device header callbacks are allowed to reallocate the skb head, invalidating pointers into it. This can happen when a send is blocked in copy_from_user() while the first non-Ethernet port is added to an empty team device. The team's delegated GRE header callback then expands the skb head. PPPoE subsequently writes six bytes through the stale pointer into the freed head. Reload the PPPoE header through the skb's network-header offset after device header creation. pskb_expand_head() updates that offset when it relocates the head.

[ Fixes ]Fixes and patches

  • Linux kernel module blockerInterim mitigation · PrivacySafe · List, check and reversible blocks for The Linux kernel on every distribution: stop any module from loading, with a list of 42 (recent exploits, older well known flaws, rarely needed attack surface), a status command and a rollback
  • Linux kernel local root quartetInterim mitigation · PrivacySafe · Check, opt-in protective measures (`mitigate`) and rollback for The Linux kernel on every distribution: four local privilege escalations with public exploits (IPsec AH6, TUN/TAP, PPPoE, SCTP), each fixed at a different release per branch

[ Advisories ]Government CERT advisories

  • CERT-FRCERTFR-2026-AVI-1431

    Multiple vulnerabilities in the Red Hat Linux kernel Translated from French

    Multiple vulnerabilities have been discovered in the Red Hat Linux kernel. Some of them allow an attacker to cause remote arbitrary code execution, privilege escalation and remote denial of service.

    CVE-2026-80887CVE-2026-54369CVE-2026-68138+130 more CVEs
  • CERT-FRCERTFR-2026-AVI-1385

    Multiple vulnerabilities in VMware products Translated from French

    Multiple vulnerabilities have been discovered in VMware products. They allow an attacker to cause a security problem not specified by the vendor.

    CVE-2019-25013CVE-2017-9937CVE-2025-6395+4953 more CVEs
  • CERT-FRCERTFR-2026-AVI-1335

    Multiple vulnerabilities in the SUSE Linux kernel Translated from French

    Multiple vulnerabilities have been discovered in the SUSE Linux kernel. Some of them allow an attacker to cause privilege escalation, remote denial of service and a breach of data confidentiality.

    CVE-2026-72436CVE-2026-74632CVE-2026-89702+602 more CVEs
  • CERT-FRCERTFR-2026-AVI-1333

    Multiple vulnerabilities in the Ubuntu Linux kernel Translated from French

    Multiple vulnerabilities have been discovered in the Ubuntu Linux kernel. Some of them allow an attacker to cause remote arbitrary code execution, privilege escalation and a breach of data confidentiality.

    CVE-2026-72407CVE-2026-72436CVE-2026-68116+1919 more CVEs
  • CERT-FRCERTFR-2026-AVI-1286

    Multiple vulnerabilities in the Ubuntu Linux kernel Translated from French

    Multiple vulnerabilities have been discovered in the Ubuntu Linux kernel. Some of them allow an attacker to cause privilege escalation, remote denial of service and a breach of data confidentiality.

    CVE-2022-27664CVE-2022-3114CVE-2022-41723+2211 more CVEs
  • CERT-FRCERTFR-2026-AVI-1288

    Multiple vulnerabilities in the SUSE Linux kernel Translated from French

    Multiple vulnerabilities have been discovered in the SUSE Linux kernel. Some of them allow an attacker to cause arbitrary code execution, remote denial of service and a breach of data confidentiality.

    CVE-2026-53381CVE-2026-74394CVE-2026-68480+94 more CVEs

[ References ]References