The vulnerability of the ppp_send_frame() function in the drivers/net/ppp/ppp_generic.c module of the Point-to-Point PPP protocol driver in the Linux operating system allows a attacker to cause a service failure.

The vulnerability of the pppsendframe function in the drivers/net/ppp/pppgeneric.c module of the Point-to-Point PPP protocol driver in the Linux operating system is related to the lack of resource initialization. Exploiting this vulnerability can allow an attacker to cause a service failure...

FreeBSD-SA-26:60.ppp

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 ============================================================================= FreeBSD-SA-26:60.ppp Security Advisory The FreeBSD Project Topic: Multiple vulnerabilities in ppp8 Category: core Module: ppp Announced: 2026-08-25 Credits: Robert Morris...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, Linux, Linux 5.15

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...

Astra Linux – Vulnerability found in Linux 6.1, Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: ppp: Fixed race conditions in pppfillforwardpath. pppfillforwardpath has two race conditions: 1. The ppp-channels list can change between listempty and listfirstentry, as ppplock is not held. If the only channel is deleted in...

Astra Linux – Vulnerability in Linux

A flaw was discovered in the HDLCPPP module of the Linux kernel in versions prior to 5.9-rc7. Memory corruption and a read overflow occur due to improper input validation in the pppcpparsecr function, which can cause the system to crash or lead to a denial of service. The greatest threat posed by...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, Linux, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: ppp: Fixed the “KMSAN: uninit-value” warning with bpf. Syzbot detected a “KMSAN: uninit-value” warning 1. This issue arises because the ppp driver does not initialize a 2-byte header when using socket filter. The following code c...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-5.15, Linux-6.1

In the Linux kernel, the following vulnerability has been resolved: ppp: Rejects packets that are claimed to be LCP packets but are actually malformed packets. Since pppasyncencode assumes that the packets are valid LCP packets with codes from 1 to 7 inclusive, add pppcheckpacket to ensure that t...

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

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...

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,...