{"id":"DEBIAN-CVE-2025-21716","details":"In the Linux kernel, the following vulnerability has been resolved:  vxlan: Fix uninit-value in vxlan_vnifilter_dump()  KMSAN reported an uninit-value access in vxlan_vnifilter_dump() [1].  If the length of the netlink message payload is less than sizeof(struct tunnel_msg), vxlan_vnifilter_dump() accesses bytes beyond the message. This can lead to uninit-value access. Fix this by returning an error in such situations.  [1] BUG: KMSAN: uninit-value in vxlan_vnifilter_dump+0x328/0x920 drivers/net/vxlan/vxlan_vnifilter.c:422  vxlan_vnifilter_dump+0x328/0x920 drivers/net/vxlan/vxlan_vnifilter.c:422  rtnl_dumpit+0xd5/0x2f0 net/core/rtnetlink.c:6786  netlink_dump+0x93e/0x15f0 net/netlink/af_netlink.c:2317  __netlink_dump_start+0x716/0xd60 net/netlink/af_netlink.c:2432  netlink_dump_start include/linux/netlink.h:340 [inline]  rtnetlink_dump_start net/core/rtnetlink.c:6815 [inline]  rtnetlink_rcv_msg+0x1256/0x14a0 net/core/rtnetlink.c:6882  netlink_rcv_skb+0x467/0x660 net/netlink/af_netlink.c:2542  rtnetlink_rcv+0x35/0x40 net/core/rtnetlink.c:6944  netlink_unicast_kernel net/netlink/af_netlink.c:1321 [inline]  netlink_unicast+0xed6/0x1290 net/netlink/af_netlink.c:1347  netlink_sendmsg+0x1092/0x1230 net/netlink/af_netlink.c:1891  sock_sendmsg_nosec net/socket.c:711 [inline]  __sock_sendmsg+0x330/0x3d0 net/socket.c:726  ____sys_sendmsg+0x7f4/0xb50 net/socket.c:2583  ___sys_sendmsg+0x271/0x3b0 net/socket.c:2637  __sys_sendmsg net/socket.c:2669 [inline]  __do_sys_sendmsg net/socket.c:2674 [inline]  __se_sys_sendmsg net/socket.c:2672 [inline]  __x64_sys_sendmsg+0x211/0x3e0 net/socket.c:2672  x64_sys_call+0x3878/0x3d90 arch/x86/include/generated/asm/syscalls_64.h:47  do_syscall_x64 arch/x86/entry/common.c:52 [inline]  do_syscall_64+0xd9/0x1d0 arch/x86/entry/common.c:83  entry_SYSCALL_64_after_hwframe+0x77/0x7f  Uninit was created at:  slab_post_alloc_hook mm/slub.c:4110 [inline]  slab_alloc_node mm/slub.c:4153 [inline]  kmem_cache_alloc_node_noprof+0x800/0xe80 mm/slub.c:4205  kmalloc_reserve+0x13b/0x4b0 net/core/skbuff.c:587  __alloc_skb+0x347/0x7d0 net/core/skbuff.c:678  alloc_skb include/linux/skbuff.h:1323 [inline]  netlink_alloc_large_skb+0xa5/0x280 net/netlink/af_netlink.c:1196  netlink_sendmsg+0xac9/0x1230 net/netlink/af_netlink.c:1866  sock_sendmsg_nosec net/socket.c:711 [inline]  __sock_sendmsg+0x330/0x3d0 net/socket.c:726  ____sys_sendmsg+0x7f4/0xb50 net/socket.c:2583  ___sys_sendmsg+0x271/0x3b0 net/socket.c:2637  __sys_sendmsg net/socket.c:2669 [inline]  __do_sys_sendmsg net/socket.c:2674 [inline]  __se_sys_sendmsg net/socket.c:2672 [inline]  __x64_sys_sendmsg+0x211/0x3e0 net/socket.c:2672  x64_sys_call+0x3878/0x3d90 arch/x86/include/generated/asm/syscalls_64.h:47  do_syscall_x64 arch/x86/entry/common.c:52 [inline]  do_syscall_64+0xd9/0x1d0 arch/x86/entry/common.c:83  entry_SYSCALL_64_after_hwframe+0x77/0x7f  CPU: 0 UID: 0 PID: 30991 Comm: syz.4.10630 Not tainted 6.12.0-10694-gc44daa7e3c73 #29 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-3.fc41 04/01/2014","modified":"2026-09-01T16:06:09.806546199Z","published":"2025-02-27T02:15:15.273Z","upstream":["CVE-2025-21716"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2025-21716"}],"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-2025-21716.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-2025-21716.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-2025-21716.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:N/I:N/A:H"}]}