Answer in brief
CVE-2025-38574 records a Unknown severity vulnerability in pptp: ensure minimal skb length in pptp_xmit(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2025-38574 records a Unknown severity vulnerability in pptp: ensure minimal skb length in pptp_xmit(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <97b8c5d322c5c0038cac4bc56fdbe237d0be426f || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <26672f1679b143aa34fca0b6046b7fd0c184770d || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5de7513f38f3c19c0610294ee478242bea356f8c || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <504cc4ab91073d2ac7404ad146139f86ecee7193 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5005d24377378a20e5c0e53052fc4ebdcdcbc611 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ea99b88b1999ebcb24d5d3a6b7910030f40d3bba || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b7dcda76fd0615c0599c89f36873a6cd48e02dbb || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1a04db0fd75cb6034fc27a56b67b3b8b9022a98c || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <de9c4861fb42f0cd72da844c3c34f692d5895b7b | 97b8c5d322c5c0038cac4bc56fdbe237d0be426f, 26672f1679b143aa34fca0b6046b7fd0c184770d, 5de7513f38f3c19c0610294ee478242bea356f8c, 504cc4ab91073d2ac7404ad146139f86ecee7193, 5005d24377378a20e5c0e53052fc4ebdcdcbc611, ea99b88b1999ebcb24d5d3a6b7910030f40d3bba, b7dcda76fd0615c0599c89f36873a6cd48e02dbb, 1a04db0fd75cb6034fc27a56b67b3b8b9022a98c, de9c4861fb42f0cd72da844c3c34f692d5895b7b |
| Linux/Linuxgeneric | 2.6.12 | Not reported |
Published upstream
Aug 19, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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
Quoted source text, attributed separately from HOL analysis.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <97b8c5d322c5c0038cac4bc56fdbe237d0be426f || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <26672f1679b143aa34fca0b6046b7fd0c184770d || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5de7513f38f3c19c0610294ee478242bea356f8c || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <504cc4ab91073d2ac7404ad146139f86ecee7193 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5005d24377378a20e5c0e53052fc4ebdcdcbc611 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ea99b88b1999ebcb24d5d3a6b7910030f40d3bba || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b7dcda76fd0615c0599c89f36873a6cd48e02dbb || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1a04db0fd75cb6034fc27a56b67b3b8b9022a98c || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <de9c4861fb42f0cd72da844c3c34f692d5895b7b | 97b8c5d322c5c0038cac4bc56fdbe237d0be426f, 26672f1679b143aa34fca0b6046b7fd0c184770d, 5de7513f38f3c19c0610294ee478242bea356f8c, 504cc4ab91073d2ac7404ad146139f86ecee7193, 5005d24377378a20e5c0e53052fc4ebdcdcbc611, ea99b88b1999ebcb24d5d3a6b7910030f40d3bba, b7dcda76fd0615c0599c89f36873a6cd48e02dbb, 1a04db0fd75cb6034fc27a56b67b3b8b9022a98c, de9c4861fb42f0cd72da844c3c34f692d5895b7b |
| Linux/Linuxgeneric | 2.6.12 | Not reported |
Published upstream
Aug 19, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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
Quoted source text, attributed separately from HOL analysis.