Updated: 2026-02-04 04:35:12.334797
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
| Links | NIST | CIRCL | RHEL | Ubuntu |
| Severity | Score | |
|---|---|---|
| CVSS Version 2.x | 0.0 | |
| CVSS Version 3.x | HIGH | 7.8 |
| OS name | Project name | Version | Score | Severity | Status | Errata | Last updated | Statement |
|---|---|---|---|---|---|---|---|---|
| AlmaLinux 9.2 ESU | kernel | 5.14.0 | 7.8 | HIGH | In Progress | 2026-02-09 10:05:48 | ||
| CentOS 6 ELS | kernel | 2.6.32 | 7.8 | HIGH | Not Vulnerable | 2026-02-09 20:09:23 | ||
| CentOS 7 ELS | kernel | 3.10.0 | 7.8 | HIGH | In Testing | 2026-02-09 20:09:20 | ||
| CentOS 8.4 ELS | kernel | 4.18.0 | 7.8 | HIGH | In Progress | 2026-02-09 10:05:49 | ||
| CentOS 8.5 ELS | kernel | 4.18.0 | 7.8 | HIGH | In Progress | 2026-02-09 10:05:50 | ||
| CentOS Stream 8 ELS | kernel | 4.18.0 | 7.8 | HIGH | In Progress | 2026-02-09 00:22:54 | ||
| CloudLinux 7 ELS | kernel | 3.10.0 | 7.8 | HIGH | Needs Triage | 2026-02-06 08:05:36 | ||
| Oracle Linux 6 ELS | kernel | 2.6.32 | 7.8 | HIGH | Needs Triage | 2026-02-06 08:05:30 | ||
| Oracle Linux 7 ELS | kernel | 3.10.0 | 7.8 | HIGH | Needs Triage | 2026-02-06 08:05:34 | ||
| Oracle Linux 7 ELS | kernel-uek | 5.4.17 | 7.8 | HIGH | Already Fixed | 2026-02-06 09:09:52 |