CVE-2025-38574pptp: ensure minimal skb length in pptp_xmit()
Updated under an hour ago ()
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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.
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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
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
- https://git.kernel.org/stable/c/97b8c5d322c5c0038cac4bc56fdbe237d0be426fpatch
- https://git.kernel.org/stable/c/26672f1679b143aa34fca0b6046b7fd0c184770dpatch
- https://git.kernel.org/stable/c/5de7513f38f3c19c0610294ee478242bea356f8cpatch
- https://git.kernel.org/stable/c/504cc4ab91073d2ac7404ad146139f86ecee7193patch
- https://git.kernel.org/stable/c/5005d24377378a20e5c0e53052fc4ebdcdcbc611patch
- https://git.kernel.org/stable/c/ea99b88b1999ebcb24d5d3a6b7910030f40d3bbapatch
- https://git.kernel.org/stable/c/b7dcda76fd0615c0599c89f36873a6cd48e02dbbpatch
- https://git.kernel.org/stable/c/1a04db0fd75cb6034fc27a56b67b3b8b9022a98cpatch
- https://git.kernel.org/stable/c/de9c4861fb42f0cd72da844c3c34f692d5895b7bpatch
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.htmlmailing-list, third-party-advisory
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlmailing-list, third-party-advisory
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.