{"id":"CVE-2024-49952","revision":"f8acc99ce745446a827c17b5ec8f9909","records":[{"revision":"f8acc99ce745446a827c17b5ec8f9909","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2024-49952","aliases":[],"title":"netfilter: nf_tables: prevent nf_skb_duplicated corruption","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_tables: prevent nf_skb_duplicated corruption\n\nsyzbot found that nf_dup_ipv4() or nf_dup_ipv6() could write\nper-cpu variable nf_skb_duplicated in an unsafe way [1].\n\nDisabling preemption as hinted by the splat is not enough,\nwe have to disable soft interrupts as well.\n\n[1]\nBUG: using __this_cpu_write() in preemptible [00000000] code: syz.4.282/6316\n caller is nf_dup_ipv4+0x651/0x8f0 net/ipv4/netfilter/nf_dup_ipv4.c:87\nCPU: 0 UID: 0 PID: 6316 Comm: syz.4.282 Not tainted 6.11.0-rc7-syzkaller-00104-g7052622fccb1 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024\nCall Trace:\n \n __dump_stack lib/dump_stack.c:93 [inline]\n dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119\n check_preemption_disabled+0x10e/0x120 lib/smp_processor_id.c:49\n nf_dup_ipv4+0x651/0x8f0 net/ipv4/netfilter/nf_dup_ipv4.c:87\n nft_dup_ipv4_eval+0x1db/0x300 net/ipv4/netfilter/nft_dup_ipv4.c:30\n expr_call_ops_eval net/netfilter/nf_tables_core.c:240 [inline]\n nft_do_chain+0x4ad/0x1da0 net/netfilter/nf_tables_core.c:288\n nft_do_chain_ipv4+0x202/0x320 net/netfilter/nft_chain_filter.c:23\n nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]\n nf_hook_slow+0xc3/0x220 net/netfilter/core.c:626\n nf_hook+0x2c4/0x450 include/linux/netfilter.h:269\n NF_HOOK_COND include/linux/netfilter.h:302 [inline]\n ip_output+0x185/0x230 net/ipv4/ip_output.c:433\n ip_local_out net/ipv4/ip_output.c:129 [inline]\n ip_send_skb+0x74/0x100 net/ipv4/ip_output.c:1495\n udp_send_skb+0xacf/0x1650 net/ipv4/udp.c:981\n udp_sendmsg+0x1c21/0x2a60 net/ipv4/udp.c:1269\n sock_sendmsg_nosec net/socket.c:730 [inline]\n __sock_sendmsg+0x1a6/0x270 net/socket.c:745\n ____sys_sendmsg+0x525/0x7d0 net/socket.c:2597\n ___sys_sendmsg net/socket.c:2651 [inline]\n __sys_sendmmsg+0x3b2/0x740 net/socket.c:2737\n __do_sys_sendmmsg net/socket.c:2766 [inline]\n __se_sys_sendmmsg net/socket.c:2763 [inline]\n __x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2763\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\nRIP: 0033:0x7f4ce4f7def9\nCode: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007f4ce5d4a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133\nRAX: ffffffffffffffda RBX: 00007f4ce5135f80 RCX: 00007f4ce4f7def9\nRDX: 0000000000000001 RSI: 0000000020005d40 RDI: 0000000000000006\nRBP: 00007f4ce4ff0b76 R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\nR13: 0000000000000000 R14: 00007f4ce5135f80 R15: 00007ffd4cbc6d68\n ","state":0,"publishedAt":"2024-10-21T18:02:07.718+00:00","modifiedAt":"2026-10-15T00:55:02.545+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/netfilter/nf_dup_ipv4.c\",\n \"net/ipv6/netfilter/nf_dup_ipv6.c\"\n ],\n \"versions\": [\n {\n \"version\": \"d877f07112f1e5a247c6b585c971a93895c9f738\",\n \"lessThan\": \"50067d8b3f48e4cd4c9e817d3e9a5b5ff3507ca7\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"d877f07112f1e5a247c6b585c971a93895c9f738\",\n \"lessThan\": \"c0add6ed2cf1c4733cd489efc61faeccd3433b41\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"d877f07112f1e5a247c6b585c971a93895c9f738\",\n \"lessThan\": \"531754952f5dfc4b141523088147071d6e6112c4\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"d877f07112f1e5a247c6b585c971a93895c9f738\",\n \"lessThan\": \"38e3fd0c4a2616052eb3c8f4e6f32d1ff47cd663\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"d877f07112f1e5a247c6b585c971a93895c9f738\",\n \"lessThan\": \"b40b027a0c0cc1cb9471a13f9730bb2fff12a15b\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"d877f07112f1e5a247c6b585c971a93895c9f738\",\n \"lessThan\": \"4e3542f40f3a94efa59ea328e307c50601ed7065\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"d877f07112f1e5a247c6b585c971a93895c9f738\",\n \"lessThan\": \"f839c5cd348201fec440d987cbca9b979bdb4fa7\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"d877f07112f1e5a247c6b585c971a93895c9f738\",\n \"lessThan\": \"752e1924604254f1708f3e3700283a86ebdd325d\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"d877f07112f1e5a247c6b585c971a93895c9f738\",\n \"lessThan\": \"92ceba94de6fb4cee2bf40b485979c342f44a492\",\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/netfilter/nf_dup_ipv4.c\",\n \"net/ipv6/netfilter/nf_dup_ipv6.c\"\n ],\n \"versions\": [\n {\n \"version\": \"4.3\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"4.3\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"4.19.323\",\n \"lessThanOrEqual\": \"4.19.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.4.285\",\n \"lessThanOrEqual\": \"5.4.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.227\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.168\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.113\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.55\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.10.14\",\n \"lessThanOrEqual\": \"6.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.11.3\",\n \"lessThanOrEqual\": \"6.11.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12\",\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:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/50067d8b3f48e4cd4c9e817d3e9a5b5ff3507ca7","https://git.kernel.org/stable/c/c0add6ed2cf1c4733cd489efc61faeccd3433b41","https://git.kernel.org/stable/c/531754952f5dfc4b141523088147071d6e6112c4","https://git.kernel.org/stable/c/38e3fd0c4a2616052eb3c8f4e6f32d1ff47cd663","https://git.kernel.org/stable/c/b40b027a0c0cc1cb9471a13f9730bb2fff12a15b","https://git.kernel.org/stable/c/4e3542f40f3a94efa59ea328e307c50601ed7065","https://git.kernel.org/stable/c/f839c5cd348201fec440d987cbca9b979bdb4fa7","https://git.kernel.org/stable/c/752e1924604254f1708f3e3700283a86ebdd325d","https://git.kernel.org/stable/c/92ceba94de6fb4cee2bf40b485979c342f44a492"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2024-49952","license":"CVE Program Terms of Use","key":"cve-program:CVE-2024-49952","identifiers":["CVE-2024-49952"]},"retained":false,"historicalAffected":[]}],"coverage":[]}