{"id":"CVE-2025-21719","revision":"a209789d949d429180ae31ac3cde7822","records":[{"revision":"a209789d949d429180ae31ac3cde7822","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-21719","aliases":[],"title":"ipmr: do not call mr_mfc_uses_dev() for unres entries","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nipmr: do not call mr_mfc_uses_dev() for unres entries\n\nsyzbot found that calling mr_mfc_uses_dev() for unres entries\nwould crash [1], because c->mfc_un.res.minvif / c->mfc_un.res.maxvif\nalias to \"struct sk_buff_head unresolved\", which contain two pointers.\n\nThis code never worked, lets remove it.\n\n[1]\nUnable to handle kernel paging request at virtual address ffff5fff2d536613\nKASAN: maybe wild-memory-access in range [0xfffefff96a9b3098-0xfffefff96a9b309f]\nModules linked in:\nCPU: 1 UID: 0 PID: 7321 Comm: syz.0.16 Not tainted 6.13.0-rc7-syzkaller-g1950a0af2d55 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024\npstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n pc : mr_mfc_uses_dev net/ipv4/ipmr_base.c:290 [inline]\n pc : mr_table_dump+0x5a4/0x8b0 net/ipv4/ipmr_base.c:334\n lr : mr_mfc_uses_dev net/ipv4/ipmr_base.c:289 [inline]\n lr : mr_table_dump+0x694/0x8b0 net/ipv4/ipmr_base.c:334\nCall trace:\n  mr_mfc_uses_dev net/ipv4/ipmr_base.c:290 [inline] (P)\n  mr_table_dump+0x5a4/0x8b0 net/ipv4/ipmr_base.c:334 (P)\n  mr_rtm_dumproute+0x254/0x454 net/ipv4/ipmr_base.c:382\n  ipmr_rtm_dumproute+0x248/0x4b4 net/ipv4/ipmr.c:2648\n  rtnl_dump_all+0x2e4/0x4e8 net/core/rtnetlink.c:4327\n  rtnl_dumpit+0x98/0x1d0 net/core/rtnetlink.c:6791\n  netlink_dump+0x4f0/0xbc0 net/netlink/af_netlink.c:2317\n  netlink_recvmsg+0x56c/0xe64 net/netlink/af_netlink.c:1973\n  sock_recvmsg_nosec net/socket.c:1033 [inline]\n  sock_recvmsg net/socket.c:1055 [inline]\n  sock_read_iter+0x2d8/0x40c net/socket.c:1125\n  new_sync_read fs/read_write.c:484 [inline]\n  vfs_read+0x740/0x970 fs/read_write.c:565\n  ksys_read+0x15c/0x26c fs/read_write.c:708","state":0,"publishedAt":"2025-02-27T02:07:28.573+00:00","modifiedAt":"2026-10-15T21:51:52.573+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/ipv4/ipmr_base.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"cb167893f41e21e6bd283d78e53489289dc0592d\",\n                            \"lessThan\": \"71a0fcb68c0a5f3ec912b540cd5d72148e6ee5f1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"cb167893f41e21e6bd283d78e53489289dc0592d\",\n                            \"lessThan\": \"53df27fd38f84bd3cd6b004eb4ff3c4903114f1d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"cb167893f41e21e6bd283d78e53489289dc0592d\",\n                            \"lessThan\": \"547ef7e8cbb98f966c8719a3e15d4e078aaa9b47\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"cb167893f41e21e6bd283d78e53489289dc0592d\",\n                            \"lessThan\": \"57177c5f47a8da852f8d76cf6945cf803f8bb9e5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"cb167893f41e21e6bd283d78e53489289dc0592d\",\n                            \"lessThan\": \"b379b3162ff55a70464c6a934ae9bf0497478a62\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"cb167893f41e21e6bd283d78e53489289dc0592d\",\n                            \"lessThan\": \"a099834a51ccf9bbba3de86a251b3433539abfde\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"cb167893f41e21e6bd283d78e53489289dc0592d\",\n                            \"lessThan\": \"26bb7d991f04eeef47dfad23e533834995c26f7a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"cb167893f41e21e6bd283d78e53489289dc0592d\",\n                            \"lessThan\": \"15a901361ec3fb1c393f91880e1cbf24ec0a88bd\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/ipv4/ipmr_base.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.20\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.20\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.4.291\",\n                            \"lessThanOrEqual\": \"5.4.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.235\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.179\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.129\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.76\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.13\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.13.2\",\n                            \"lessThanOrEqual\": \"6.13.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.14\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","score":7.1,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/71a0fcb68c0a5f3ec912b540cd5d72148e6ee5f1","https://git.kernel.org/stable/c/53df27fd38f84bd3cd6b004eb4ff3c4903114f1d","https://git.kernel.org/stable/c/547ef7e8cbb98f966c8719a3e15d4e078aaa9b47","https://git.kernel.org/stable/c/57177c5f47a8da852f8d76cf6945cf803f8bb9e5","https://git.kernel.org/stable/c/b379b3162ff55a70464c6a934ae9bf0497478a62","https://git.kernel.org/stable/c/a099834a51ccf9bbba3de86a251b3433539abfde","https://git.kernel.org/stable/c/26bb7d991f04eeef47dfad23e533834995c26f7a","https://git.kernel.org/stable/c/15a901361ec3fb1c393f91880e1cbf24ec0a88bd"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-21719","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-21719","identifiers":["CVE-2025-21719"]},"retained":false,"historicalAffected":[]}],"coverage":[]}