Answer in brief
CVE-2025-21719 records a Unknown severity vulnerability in ipmr: do not call mr_mfc_uses_dev() for unres entries. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (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-2025-21719 records a Unknown severity vulnerability in ipmr: do not call mr_mfc_uses_dev() for unres entries. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (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), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=cb167893f41e21e6bd283d78e53489289dc0592d <71a0fcb68c0a5f3ec912b540cd5d72148e6ee5f1 || >=cb167893f41e21e6bd283d78e53489289dc0592d <53df27fd38f84bd3cd6b004eb4ff3c4903114f1d || >=cb167893f41e21e6bd283d78e53489289dc0592d <547ef7e8cbb98f966c8719a3e15d4e078aaa9b47 || >=cb167893f41e21e6bd283d78e53489289dc0592d <57177c5f47a8da852f8d76cf6945cf803f8bb9e5 || >=cb167893f41e21e6bd283d78e53489289dc0592d <b379b3162ff55a70464c6a934ae9bf0497478a62 || >=cb167893f41e21e6bd283d78e53489289dc0592d <a099834a51ccf9bbba3de86a251b3433539abfde || >=cb167893f41e21e6bd283d78e53489289dc0592d <26bb7d991f04eeef47dfad23e533834995c26f7a || >=cb167893f41e21e6bd283d78e53489289dc0592d <15a901361ec3fb1c393f91880e1cbf24ec0a88bd | 71a0fcb68c0a5f3ec912b540cd5d72148e6ee5f1, 53df27fd38f84bd3cd6b004eb4ff3c4903114f1d, 547ef7e8cbb98f966c8719a3e15d4e078aaa9b47, 57177c5f47a8da852f8d76cf6945cf803f8bb9e5, b379b3162ff55a70464c6a934ae9bf0497478a62, a099834a51ccf9bbba3de86a251b3433539abfde, 26bb7d991f04eeef47dfad23e533834995c26f7a, 15a901361ec3fb1c393f91880e1cbf24ec0a88bd |
| Linux/Linuxgeneric | 4.20 | Not reported |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <* | * |
Published upstream
Feb 27, 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: ipmr: do not call mr_mfc_uses_dev() for unres entries syzbot found that calling mr_mfc_uses_dev() for unres entries would crash [1], because c->mfc_un.res.minvif / c->mfc_un.res.maxvif alias to "struct sk_buff_head unresolved", which contain two pointers. This code never worked, lets remove it. [1] Unable to handle kernel paging request at virtual address ffff5fff2d536613 KASAN: maybe wild-memory-access in range [0xfffefff96a9b3098-0xfffefff96a9b309f] Modules linked in: CPU: 1 UID: 0 PID: 7321 Comm: syz.0.16 Not tainted 6.13.0-rc7-syzkaller-g1950a0af2d55 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : mr_mfc_uses_dev net/ipv4/ipmr_base.c:290 [inline] pc : mr_table_dump+0x5a4/0x8b0 net/ipv4/ipmr_base.c:334 lr : mr_mfc_uses_dev net/ipv4/ipmr_base.c:289 [inline] lr : mr_table_dump+0x694/0x8b0 net/ipv4/ipmr_base.c:334 Call trace: mr_mfc_uses_dev net/ipv4/ipmr_base.c:290 [inline] (P) mr_table_dump+0x5a4/0x8b0 net/ipv4/ipmr_base.c:334 (P) mr_rtm_dumproute+0x254/0x454 net/ipv4/ipmr_base.c:382 ipmr_rtm_dumproute+0x248/0x4b4 net/ipv4/ipmr.c:2648 rtnl_dump_all+0x2e4/0x4e8 net/core/rtnetlink.c:4327 rtnl_dumpit+0x98/0x1d0 net/core/rtnetlink.c:6791 netlink_dump+0x4f0/0xbc0 net/netlink/af_netlink.c:2317 netlink_recvmsg+0x56c/0xe64 net/netlink/af_netlink.c:1973 sock_recvmsg_nosec net/socket.c:1033 [inline] sock_recvmsg net/socket.c:1055 [inline] sock_read_iter+0x2d8/0x40c net/socket.c:1125 new_sync_read fs/read_write.c:484 [inline] vfs_read+0x740/0x970 fs/read_write.c:565 ksys_read+0x15c/0x26c fs/read_write.c:708
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), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=cb167893f41e21e6bd283d78e53489289dc0592d <71a0fcb68c0a5f3ec912b540cd5d72148e6ee5f1 || >=cb167893f41e21e6bd283d78e53489289dc0592d <53df27fd38f84bd3cd6b004eb4ff3c4903114f1d || >=cb167893f41e21e6bd283d78e53489289dc0592d <547ef7e8cbb98f966c8719a3e15d4e078aaa9b47 || >=cb167893f41e21e6bd283d78e53489289dc0592d <57177c5f47a8da852f8d76cf6945cf803f8bb9e5 || >=cb167893f41e21e6bd283d78e53489289dc0592d <b379b3162ff55a70464c6a934ae9bf0497478a62 || >=cb167893f41e21e6bd283d78e53489289dc0592d <a099834a51ccf9bbba3de86a251b3433539abfde || >=cb167893f41e21e6bd283d78e53489289dc0592d <26bb7d991f04eeef47dfad23e533834995c26f7a || >=cb167893f41e21e6bd283d78e53489289dc0592d <15a901361ec3fb1c393f91880e1cbf24ec0a88bd | 71a0fcb68c0a5f3ec912b540cd5d72148e6ee5f1, 53df27fd38f84bd3cd6b004eb4ff3c4903114f1d, 547ef7e8cbb98f966c8719a3e15d4e078aaa9b47, 57177c5f47a8da852f8d76cf6945cf803f8bb9e5, b379b3162ff55a70464c6a934ae9bf0497478a62, a099834a51ccf9bbba3de86a251b3433539abfde, 26bb7d991f04eeef47dfad23e533834995c26f7a, 15a901361ec3fb1c393f91880e1cbf24ec0a88bd |
| Linux/Linuxgeneric | 4.20 | Not reported |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <* | * |
Published upstream
Feb 27, 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: ipmr: do not call mr_mfc_uses_dev() for unres entries syzbot found that calling mr_mfc_uses_dev() for unres entries would crash [1], because c->mfc_un.res.minvif / c->mfc_un.res.maxvif alias to "struct sk_buff_head unresolved", which contain two pointers. This code never worked, lets remove it. [1] Unable to handle kernel paging request at virtual address ffff5fff2d536613 KASAN: maybe wild-memory-access in range [0xfffefff96a9b3098-0xfffefff96a9b309f] Modules linked in: CPU: 1 UID: 0 PID: 7321 Comm: syz.0.16 Not tainted 6.13.0-rc7-syzkaller-g1950a0af2d55 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : mr_mfc_uses_dev net/ipv4/ipmr_base.c:290 [inline] pc : mr_table_dump+0x5a4/0x8b0 net/ipv4/ipmr_base.c:334 lr : mr_mfc_uses_dev net/ipv4/ipmr_base.c:289 [inline] lr : mr_table_dump+0x694/0x8b0 net/ipv4/ipmr_base.c:334 Call trace: mr_mfc_uses_dev net/ipv4/ipmr_base.c:290 [inline] (P) mr_table_dump+0x5a4/0x8b0 net/ipv4/ipmr_base.c:334 (P) mr_rtm_dumproute+0x254/0x454 net/ipv4/ipmr_base.c:382 ipmr_rtm_dumproute+0x248/0x4b4 net/ipv4/ipmr.c:2648 rtnl_dump_all+0x2e4/0x4e8 net/core/rtnetlink.c:4327 rtnl_dumpit+0x98/0x1d0 net/core/rtnetlink.c:6791 netlink_dump+0x4f0/0xbc0 net/netlink/af_netlink.c:2317 netlink_recvmsg+0x56c/0xe64 net/netlink/af_netlink.c:1973 sock_recvmsg_nosec net/socket.c:1033 [inline] sock_recvmsg net/socket.c:1055 [inline] sock_read_iter+0x2d8/0x40c net/socket.c:1125 new_sync_read fs/read_write.c:484 [inline] vfs_read+0x740/0x970 fs/read_write.c:565 ksys_read+0x15c/0x26c fs/read_write.c:708
Quoted source text, attributed separately from HOL analysis.