{"id":"DEBIAN-CVE-2025-22056","details":"In the Linux kernel, the following vulnerability has been resolved:  netfilter: nft_tunnel: fix geneve_opt type confusion addition  When handling multiple NFTA_TUNNEL_KEY_OPTS_GENEVE attributes, the parsing logic should place every geneve_opt structure one by one compactly. Hence, when deciding the next geneve_opt position, the pointer addition should be in units of char *.  However, the current implementation erroneously does type conversion before the addition, which will lead to heap out-of-bounds write.  [    6.989857] ================================================================== [    6.990293] BUG: KASAN: slab-out-of-bounds in nft_tunnel_obj_init+0x977/0xa70 [    6.990725] Write of size 124 at addr ffff888005f18974 by task poc/178 [    6.991162] [    6.991259] CPU: 0 PID: 178 Comm: poc-oob-write Not tainted 6.1.132 #1 [    6.991655] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014 [    6.992281] Call Trace: [    6.992423]  \u003cTASK\u003e [    6.992586]  dump_stack_lvl+0x44/0x5c [    6.992801]  print_report+0x184/0x4be [    6.993790]  kasan_report+0xc5/0x100 [    6.994252]  kasan_check_range+0xf3/0x1a0 [    6.994486]  memcpy+0x38/0x60 [    6.994692]  nft_tunnel_obj_init+0x977/0xa70 [    6.995677]  nft_obj_init+0x10c/0x1b0 [    6.995891]  nf_tables_newobj+0x585/0x950 [    6.996922]  nfnetlink_rcv_batch+0xdf9/0x1020 [    6.998997]  nfnetlink_rcv+0x1df/0x220 [    6.999537]  netlink_unicast+0x395/0x530 [    7.000771]  netlink_sendmsg+0x3d0/0x6d0 [    7.001462]  __sock_sendmsg+0x99/0xa0 [    7.001707]  ____sys_sendmsg+0x409/0x450 [    7.002391]  ___sys_sendmsg+0xfd/0x170 [    7.003145]  __sys_sendmsg+0xea/0x170 [    7.004359]  do_syscall_64+0x5e/0x90 [    7.005817]  entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [    7.006127] RIP: 0033:0x7ec756d4e407 [    7.006339] Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 \u003c5b\u003e c3 0f 1f 80 00 00 00 00 83 e2 39 83 faf [    7.007364] RSP: 002b:00007ffed5d46760 EFLAGS: 00000202 ORIG_RAX: 000000000000002e [    7.007827] RAX: ffffffffffffffda RBX: 00007ec756cc4740 RCX: 00007ec756d4e407 [    7.008223] RDX: 0000000000000000 RSI: 00007ffed5d467f0 RDI: 0000000000000003 [    7.008620] RBP: 00007ffed5d468a0 R08: 0000000000000000 R09: 0000000000000000 [    7.009039] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000 [    7.009429] R13: 00007ffed5d478b0 R14: 00007ec756ee5000 R15: 00005cbd4e655cb8  Fix this bug with correct pointer addition and conversion in parse and dump code.","modified":"2026-09-01T16:06:10.700389765Z","published":"2025-04-16T15:15:59.087Z","upstream":["CVE-2025-22056"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2025-22056"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.135-1"}]}],"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","6.1.129-1","6.1.133-1","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-2025-22056.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.25-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-22056.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.25-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-22056.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:H/A:H"}]}