CVE-2025-38574

HIGH EPSS 6.3%
Published Aug 19, 202510mo ago · Modified Jun 17, 20261w ago
7.8 CVSS 3.1
High
Find Similar
Published Aug 19, 2025 10mo ago
Last Modified Jun 17, 2026 1w ago

Description

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 Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
6.3% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-908

Affected Products 14

VendorProductVersionRange
linuxlinux_kernel*≥2.6.13  –  <5.4.297
linuxlinux_kernel*≥5.5  –  <5.10.241
linuxlinux_kernel*≥5.11  –  <5.15.190
linuxlinux_kernel*≥5.16  –  <6.1.148
linuxlinux_kernel*≥6.2  –  <6.6.102
linuxlinux_kernel*≥6.7  –  <6.12.42
linuxlinux_kernel*≥6.13  –  <6.15.10
linuxlinux_kernel*≥6.16  –  <6.16.1
linuxlinux_kernel2.6.12any
linuxlinux_kernel2.6.12any
linuxlinux_kernel2.6.12any
linuxlinux_kernel2.6.12any
linuxlinux_kernel2.6.12any
debiandebian_linux11.0any

References 11

  • git.kernel.org https://git.kernel.org/stable/c/1a04db0fd75cb6034fc27a56b67b3b8b9022a98c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/26672f1679b143aa34fca0b6046b7fd0c184770d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5005d24377378a20e5c0e53052fc4ebdcdcbc611
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/504cc4ab91073d2ac7404ad146139f86ecee7193
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5de7513f38f3c19c0610294ee478242bea356f8c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/97b8c5d322c5c0038cac4bc56fdbe237d0be426f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b7dcda76fd0615c0599c89f36873a6cd48e02dbb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/de9c4861fb42f0cd72da844c3c34f692d5895b7b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ea99b88b1999ebcb24d5d3a6b7910030f40d3bba
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
    Mailing ListThird Party Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
    Mailing ListThird Party Advisory

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/1a04db0fd75cb6034fc27a56b67b3b8b9022a98c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/26672f1679b143aa34fca0b6046b7fd0c184770d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5005d24377378a20e5c0e53052fc4ebdcdcbc611
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/504cc4ab91073d2ac7404ad146139f86ecee7193
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5de7513f38f3c19c0610294ee478242bea356f8c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/97b8c5d322c5c0038cac4bc56fdbe237d0be426f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b7dcda76fd0615c0599c89f36873a6cd48e02dbb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/de9c4861fb42f0cd72da844c3c34f692d5895b7b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ea99b88b1999ebcb24d5d3a6b7910030f40d3bba
    Patch