High 8.6Published Aug 19, 2025

CVE-2025-38574pptp: ensure minimal skb length in pptp_xmit()

Updated under an hour ago (Oct 26, 2026, 11:30 PM ET)

Does this affect you?

It affects Linux and 2 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Linux

Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: pptp: ensure minimal skb length in pptp_xmit() Commit aabc6596ffb3 ("net: ppp: Add bound checking for skb data on ppp_sync_txmung") fixed ppp_sync_txmunge() We need a similar fix in pptp_xmit(), otherwise we might read uninit data as reported by syzbot. BUG: KMSAN: uninit-value in pptp_xmit+0xc34/0x2720 drivers/net/ppp/pptp.c:193 pptp_xmit+0xc34/0x2720 drivers/net/ppp/pptp.c:193 ppp_channel_bridge_input drivers/net/ppp/ppp_generic.c:2290 [inline] ppp_input+0x1d6/0xe60 drivers/net/ppp/ppp_generic.c:2314 pppoe_rcv_core+0x1e8/0x760 drivers/net/ppp/pppoe.c:379 sk_backlog_rcv+0x142/0x420 include/net/sock.h:1148 __release_sock+0x1d3/0x330 net/core/sock.c:3213 release_sock+0x6b/0x270 net/core/sock.c:3767 pppoe_sendmsg+0x15d/0xcb0 drivers/net/ppp/pppoe.c:904 sock_sendmsg_nosec net/socket.c:712 [inline] __sock_sendmsg+0x330/0x3d0 net/socket.c:727 ____sys_sendmsg+0x893/0xd80 net/socket.c:2566 ___sys_sendmsg+0x271/0x3b0 net/socket.c:2620 __sys_sendmmsg+0x2d9/0x7c0 net/socket.c:2709

CVSS: 8.6 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 15, 2026
First seen by InfoSec Signals: Oct 15, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 97b8c5d322c5c0038cac4bc56fdbe237d0be426f; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 26672f1679b143aa34fca0b6046b7fd0c184770d; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 5de7513f38f3c19c0610294ee478242bea356f8c; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 504cc4ab91073d2ac7404ad146139f86ecee7193; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 5005d24377378a20e5c0e53052fc4ebdcdcbc611; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before ea99b88b1999ebcb24d5d3a6b7910030f40d3bba; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before b7dcda76fd0615c0599c89f36873a6cd48e02dbb; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 builds before 1a04db0fd75cb6034fc27a56b67b3b8b9022a98c; and 1 more ranges	CNA record
linux linux_kernel linux:linux_kernel	from 2.6.13 before 5.4.297; from 5.5 before 5.10.241; from 5.11 before 5.15.190; from 5.16 before 6.1.148; from 6.2 before 6.6.102; from 6.7 before 6.12.42; from 6.13 before 6.15.10; from 6.16 before 6.16.1; and 5 more ranges	NVD
debian debian_linux debian:debian_linux	11.0	NVD

References

References

https://git.kernel.org/stable/c/97b8c5d322c5c0038cac4bc56fdbe237d0be426f	patch
https://git.kernel.org/stable/c/26672f1679b143aa34fca0b6046b7fd0c184770d	patch
https://git.kernel.org/stable/c/5de7513f38f3c19c0610294ee478242bea356f8c	patch
https://git.kernel.org/stable/c/504cc4ab91073d2ac7404ad146139f86ecee7193	patch
https://git.kernel.org/stable/c/5005d24377378a20e5c0e53052fc4ebdcdcbc611	patch
https://git.kernel.org/stable/c/ea99b88b1999ebcb24d5d3a6b7910030f40d3bba	patch
https://git.kernel.org/stable/c/b7dcda76fd0615c0599c89f36873a6cd48e02dbb	patch
https://git.kernel.org/stable/c/1a04db0fd75cb6034fc27a56b67b3b8b9022a98c	patch
https://git.kernel.org/stable/c/de9c4861fb42f0cd72da844c3c34f692d5895b7b	patch
https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html	mailing-list, third-party-advisory
1–10 of 11

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.