CVE-2026-68398

A flaw was found in the Linux kernel's Point-to-Point Protocol PPP over L2TP Layer 2 Tunneling Protocol implementation. An unprivileged user can exploit a Use-After-Free UAF vulnerability, where the system attempts to use memory after it has been freed. This can lead to memory corruption,...

CVE-2026-68398

In the Linux kernel, the following vulnerability has been resolved: ppp: defer channel free to an RCU grace period to fix pppol2tp RX UAF pppol2tprecv runs in the L2TP UDP-encap softirq RX path: l2tpudpencaprecv - l2tprecvcommon - pppol2tprecv - pppinput&po-chan It runs under rcureadlock holding...

CVE-2026-68398 ppp: defer channel free to an RCU grace period to fix pppol2tp RX UAF

In the Linux kernel, the following vulnerability has been resolved: ppp: defer channel free to an RCU grace period to fix pppol2tp RX UAF pppol2tprecv runs in the L2TP UDP-encap softirq RX path: l2tpudpencaprecv - l2tprecvcommon - pppol2tprecv - pppinput&po-chan It runs under rcureadlock holding...

CVE-2026-68398 ppp: defer channel free to an RCU grace period to fix pppol2tp RX UAF

In the Linux kernel, the following vulnerability has been resolved: ppp: defer channel free to an RCU grace period to fix pppol2tp RX UAF pppol2tprecv runs in the L2TP UDP-encap softirq RX path: l2tpudpencaprecv - l2tprecvcommon - pppol2tprecv - pppinput&po-chan It runs under rcureadlock holding...

EUVD-2026-55502

In the Linux kernel, the following vulnerability has been resolved: pppoe: reload header pointer after devhardheader pppoesendmsg saves a pointer to the PPPoE header before calling devhardheader. Device header callbacks are allowed to reallocate the skb head, invalidating pointers into it. This c...

Linux Distros Unpatched Vulnerability : CVE-2026-68398

"The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - ppp: defer channel free to an RCU grace period to fix pppol2tp RX UAF pppol2tprecv runs in the L2TP UDP-encap softirq RX path: l2tpudpencaprecv - l2tprecvcommo...

CVE-2026-19036

A security flaw has been discovered in Shibby Tomato 1.28.0000. This affects the function sub40F88C of the file /tmp/ppp/wanoptions. The manipulation of the argument pppcustom results in os command injection. The attack may be launched remotely. The exploit has been released to the public and may...

CVE-2026-19036

Shibby Tomato CVE-2026-19036 affects the wanoptions component: the function sub_40F88C in /tmp/ppp/wanoptions is vulnerable when processing the ppp_custom argument, enabling OS command injection. The issue can be triggered remotely, and public exploits exist. The affected product/version is Shibb...

CVE-2026-19036 Shibby Tomato wanoptions sub_40F88C os command injection

A security flaw has been discovered in Shibby Tomato 1.28.0000. This affects the function sub40F88C of the file /tmp/ppp/wanoptions. The manipulation of the argument pppcustom results in os command injection. The attack may be launched remotely. The exploit has been released to the public and may...

Astra Linux – Vulnerability found in Linux 6.1, Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: ppp: The requirement for CAPNETADMIN in the target netns is necessary for unattached IOCTls. The opening of /dev/ppp is currently allowed for file-fcred-userns, while unattached administrative IOCTls operate on...

K000162740: Linux kernel vulnerability CVE-2026-63803

Security Advisory Description In the Linux kernel, the following vulnerability has been resolved: hdlcppp: sync per-proto timers before freeing hdlc state Each PPP control protocol LCP/IPCP/IPV6CP embedded in struct ppp registers a timer via timersetup. That struct ppp is the hdlc-state allocatio...

CVE-2026-44099

CVE-2026-44099 is a local privilege escalation. Connected sources describe a vulnerability enabling a low-privilege local user to gain root privileges via manipulation of system configuration, specifically cited as Local Privilege Escalation via pppd password injection. The NVD entry reiterates t...

CVE-2026-63803

A flaw was found in the Linux kernel's hdlcppp module. This use-after-free vulnerability occurs because the Point-to-Point Protocol PPP control timers are not properly synchronized before the associated memory is freed. An attacker could potentially exploit this by triggering a race condition,...

hdlc_ppp: sync per-proto timers before freeing hdlc state

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CVE-2026-63803

In the Linux kernel, the following vulnerability has been resolved: hdlcppp: sync per-proto timers before freeing hdlc state Each PPP control protocol LCP/IPCP/IPV6CP embedded in struct ppp registers a timer via timersetup. That struct ppp is the hdlc-state allocation, which detachhdlcprotocol...

CVE-2026-63803 hdlc_ppp: sync per-proto timers before freeing hdlc state

In the Linux kernel, the following vulnerability has been resolved: hdlcppp: sync per-proto timers before freeing hdlc state Each PPP control protocol LCP/IPCP/IPV6CP embedded in struct ppp registers a timer via timersetup. That struct ppp is the hdlc-state allocation, which detachhdlcprotocol...

CVE-2026-63803

The CVE-2026-63803 has concrete technical details in the Linux kernel: hdlc_ppp timers for PPP LCP/IPCP/IPV6CP in struct ppp are not synchronized on teardown due to a missing .detach callback, causing a use-after-free when a ppp_timer dereferences freed memory. The fix adds a detach helper that c...

CVE-2026-63803

In the Linux kernel, the following vulnerability has been resolved: hdlcppp: sync per-proto timers before freeing hdlc state Each PPP control protocol LCP/IPCP/IPV6CP embedded in struct ppp registers a timer via timersetup. That struct ppp is the hdlc-state allocation, which detachhdlcprotocol...

PT-2026-61119

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A use-after-free issue exists in the HDLC PPP protocol implementation. The struct ppp allocated as hdlc-state registers timers for PPP control protocols LCP, IPCP, and IPV6CP using timer...

CVE-2026-13564

A vulnerability was found in Edimax EW-7478APC 1.04. Affected is the function formPPPoESetup of the file /goform/formPPPoESetup of the component POST Request Handler. Performing a manipulation of the argument pppUserName results in stack-based buffer overflow. The attack can be initiated remotely...