{"id":"DEBIAN-CVE-2025-21719","details":"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-\u003emfc_un.res.minvif / c-\u003emfc_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","modified":"2026-09-01T16:06:09.780549181Z","published":"2025-02-27T02:15:15.580Z","upstream":["CVE-2025-21719"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2025-21719"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.129-1"}]}],"versions":["6.1.106-1","6.1.106-2","6.1.106-3","6.1.112-1","6.1.115-1","6.1.119-1","6.1.123-1","6.1.124-1","6.1.128-1","6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1","6.1.55-1~bpo11+1","6.1.64-1","6.1.66-1","6.1.67-1","6.1.69-1","6.1.69-1~bpo11+1","6.1.76-1","6.1.76-1~bpo11+1","6.1.82-1","6.1.85-1","6.1.90-1","6.1.90-1~bpo11+1","6.1.94-1","6.1.94-1~bpo11+1","6.1.98-1","6.1.99-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-21719.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.13-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-21719.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.13-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-21719.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H"}]}