CVE-2024-50256 (GCVE-0-2024-50256)

Vulnerability from cvelistv5 – Published: 2024-11-09 10:15 – Updated: 2026-05-11 20:48
VLAI
Title
netfilter: nf_reject_ipv6: fix potential crash in nf_send_reset6()
Summary
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_reject_ipv6: fix potential crash in nf_send_reset6() I got a syzbot report without a repro [1] crashing in nf_send_reset6() I think the issue is that dev->hard_header_len is zero, and we attempt later to push an Ethernet header. Use LL_MAX_HEADER, as other functions in net/ipv6/netfilter/nf_reject_ipv6.c. [1] skbuff: skb_under_panic: text:ffffffff89b1d008 len:74 put:14 head:ffff88803123aa00 data:ffff88803123a9f2 tail:0x3c end:0x140 dev:syz_tun kernel BUG at net/core/skbuff.c:206 ! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 0 UID: 0 PID: 7373 Comm: syz.1.568 Not tainted 6.12.0-rc2-syzkaller-00631-g6d858708d465 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:skb_panic net/core/skbuff.c:206 [inline] RIP: 0010:skb_under_panic+0x14b/0x150 net/core/skbuff.c:216 Code: 0d 8d 48 c7 c6 60 a6 29 8e 48 8b 54 24 08 8b 0c 24 44 8b 44 24 04 4d 89 e9 50 41 54 41 57 41 56 e8 ba 30 38 02 48 83 c4 20 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 RSP: 0018:ffffc900045269b0 EFLAGS: 00010282 RAX: 0000000000000088 RBX: dffffc0000000000 RCX: cd66dacdc5d8e800 RDX: 0000000000000000 RSI: 0000000000000200 RDI: 0000000000000000 RBP: ffff88802d39a3d0 R08: ffffffff8174afec R09: 1ffff920008a4ccc R10: dffffc0000000000 R11: fffff520008a4ccd R12: 0000000000000140 R13: ffff88803123aa00 R14: ffff88803123a9f2 R15: 000000000000003c FS: 00007fdbee5ff6c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000005d322000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> skb_push+0xe5/0x100 net/core/skbuff.c:2636 eth_header+0x38/0x1f0 net/ethernet/eth.c:83 dev_hard_header include/linux/netdevice.h:3208 [inline] nf_send_reset6+0xce6/0x1270 net/ipv6/netfilter/nf_reject_ipv6.c:358 nft_reject_inet_eval+0x3b9/0x690 net/netfilter/nft_reject_inet.c:48 expr_call_ops_eval net/netfilter/nf_tables_core.c:240 [inline] nft_do_chain+0x4ad/0x1da0 net/netfilter/nf_tables_core.c:288 nft_do_chain_inet+0x418/0x6b0 net/netfilter/nft_chain_filter.c:161 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_slow+0xc3/0x220 net/netfilter/core.c:626 nf_hook include/linux/netfilter.h:269 [inline] NF_HOOK include/linux/netfilter.h:312 [inline] br_nf_pre_routing_ipv6+0x63e/0x770 net/bridge/br_netfilter_ipv6.c:184 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_bridge_pre net/bridge/br_input.c:277 [inline] br_handle_frame+0x9fd/0x1530 net/bridge/br_input.c:424 __netif_receive_skb_core+0x13e8/0x4570 net/core/dev.c:5562 __netif_receive_skb_one_core net/core/dev.c:5666 [inline] __netif_receive_skb+0x12f/0x650 net/core/dev.c:5781 netif_receive_skb_internal net/core/dev.c:5867 [inline] netif_receive_skb+0x1e8/0x890 net/core/dev.c:5926 tun_rx_batched+0x1b7/0x8f0 drivers/net/tun.c:1550 tun_get_user+0x3056/0x47e0 drivers/net/tun.c:2007 tun_chr_write_iter+0x10d/0x1f0 drivers/net/tun.c:2053 new_sync_write fs/read_write.c:590 [inline] vfs_write+0xa6d/0xc90 fs/read_write.c:683 ksys_write+0x183/0x2b0 fs/read_write.c:736 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fdbeeb7d1ff Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 c9 8d 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 1c 8e 02 00 48 RSP: 002b:00007fdbee5ff000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fdbeed36058 RCX: 00007fdbeeb7d1ff RDX: 000000000000008e RSI: 0000000020000040 RDI: 00000000000000c8 RBP: 00007fdbeebf12be R08: 0000000 ---truncated---
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: c8d7b98bec43faaa6583c3135030be5eb4693acb , < 4f7b586aae53c2ed820661803da8ce18b1361921 (git)
Affected: c8d7b98bec43faaa6583c3135030be5eb4693acb , < fef63832317d9d24e1214cdd8f204d02ebdf8499 (git)
Affected: c8d7b98bec43faaa6583c3135030be5eb4693acb , < f85b057e34419e5ec0583a65078a11ccc1d4540a (git)
Affected: c8d7b98bec43faaa6583c3135030be5eb4693acb , < 4ed234fe793f27a3b151c43d2106df2ff0d81aac (git)
Create a notification for this product.
Linux Linux Affected: 3.18
Unaffected: 0 , < 3.18 (semver)
Unaffected: 6.1.116 , ≤ 6.1.* (semver)
Unaffected: 6.6.60 , ≤ 6.6.* (semver)
Unaffected: 6.11.7 , ≤ 6.11.* (semver)
Unaffected: 6.12 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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              "baseScore": 5.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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          "product": "Linux",
          "programFiles": [
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              "version": "6.6.60",
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              "version": "6.12",
              "versionType": "original_commit_for_fix"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_reject_ipv6: fix potential crash in nf_send_reset6()\n\nI got a syzbot report without a repro [1] crashing in nf_send_reset6()\n\nI think the issue is that dev-\u003ehard_header_len is zero, and we attempt\nlater to push an Ethernet header.\n\nUse LL_MAX_HEADER, as other functions in net/ipv6/netfilter/nf_reject_ipv6.c.\n\n[1]\n\nskbuff: skb_under_panic: text:ffffffff89b1d008 len:74 put:14 head:ffff88803123aa00 data:ffff88803123a9f2 tail:0x3c end:0x140 dev:syz_tun\n kernel BUG at net/core/skbuff.c:206 !\nOops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI\nCPU: 0 UID: 0 PID: 7373 Comm: syz.1.568 Not tainted 6.12.0-rc2-syzkaller-00631-g6d858708d465 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024\n RIP: 0010:skb_panic net/core/skbuff.c:206 [inline]\n RIP: 0010:skb_under_panic+0x14b/0x150 net/core/skbuff.c:216\nCode: 0d 8d 48 c7 c6 60 a6 29 8e 48 8b 54 24 08 8b 0c 24 44 8b 44 24 04 4d 89 e9 50 41 54 41 57 41 56 e8 ba 30 38 02 48 83 c4 20 90 \u003c0f\u003e 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3\nRSP: 0018:ffffc900045269b0 EFLAGS: 00010282\nRAX: 0000000000000088 RBX: dffffc0000000000 RCX: cd66dacdc5d8e800\nRDX: 0000000000000000 RSI: 0000000000000200 RDI: 0000000000000000\nRBP: ffff88802d39a3d0 R08: ffffffff8174afec R09: 1ffff920008a4ccc\nR10: dffffc0000000000 R11: fffff520008a4ccd R12: 0000000000000140\nR13: ffff88803123aa00 R14: ffff88803123a9f2 R15: 000000000000003c\nFS:  00007fdbee5ff6c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000000000000000 CR3: 000000005d322000 CR4: 00000000003526f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n \u003cTASK\u003e\n  skb_push+0xe5/0x100 net/core/skbuff.c:2636\n  eth_header+0x38/0x1f0 net/ethernet/eth.c:83\n  dev_hard_header include/linux/netdevice.h:3208 [inline]\n  nf_send_reset6+0xce6/0x1270 net/ipv6/netfilter/nf_reject_ipv6.c:358\n  nft_reject_inet_eval+0x3b9/0x690 net/netfilter/nft_reject_inet.c:48\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_inet+0x418/0x6b0 net/netfilter/nft_chain_filter.c:161\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 include/linux/netfilter.h:269 [inline]\n  NF_HOOK include/linux/netfilter.h:312 [inline]\n  br_nf_pre_routing_ipv6+0x63e/0x770 net/bridge/br_netfilter_ipv6.c:184\n  nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]\n  nf_hook_bridge_pre net/bridge/br_input.c:277 [inline]\n  br_handle_frame+0x9fd/0x1530 net/bridge/br_input.c:424\n  __netif_receive_skb_core+0x13e8/0x4570 net/core/dev.c:5562\n  __netif_receive_skb_one_core net/core/dev.c:5666 [inline]\n  __netif_receive_skb+0x12f/0x650 net/core/dev.c:5781\n  netif_receive_skb_internal net/core/dev.c:5867 [inline]\n  netif_receive_skb+0x1e8/0x890 net/core/dev.c:5926\n  tun_rx_batched+0x1b7/0x8f0 drivers/net/tun.c:1550\n  tun_get_user+0x3056/0x47e0 drivers/net/tun.c:2007\n  tun_chr_write_iter+0x10d/0x1f0 drivers/net/tun.c:2053\n  new_sync_write fs/read_write.c:590 [inline]\n  vfs_write+0xa6d/0xc90 fs/read_write.c:683\n  ksys_write+0x183/0x2b0 fs/read_write.c:736\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: 0033:0x7fdbeeb7d1ff\nCode: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 c9 8d 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 \u003c48\u003e 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 1c 8e 02 00 48\nRSP: 002b:00007fdbee5ff000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001\nRAX: ffffffffffffffda RBX: 00007fdbeed36058 RCX: 00007fdbeeb7d1ff\nRDX: 000000000000008e RSI: 0000000020000040 RDI: 00000000000000c8\nRBP: 00007fdbeebf12be R08: 0000000\n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T20:48:36.108Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/4f7b586aae53c2ed820661803da8ce18b1361921"
        },
        {
          "url": "https://git.kernel.org/stable/c/fef63832317d9d24e1214cdd8f204d02ebdf8499"
        },
        {
          "url": "https://git.kernel.org/stable/c/f85b057e34419e5ec0583a65078a11ccc1d4540a"
        },
        {
          "url": "https://git.kernel.org/stable/c/4ed234fe793f27a3b151c43d2106df2ff0d81aac"
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      ],
      "title": "netfilter: nf_reject_ipv6: fix potential crash in nf_send_reset6()",
      "x_generator": {
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-50256",
    "datePublished": "2024-11-09T10:15:09.551Z",
    "dateReserved": "2024-10-21T19:36:19.980Z",
    "dateUpdated": "2026-05-11T20:48:36.108Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2024-50256",
      "date": "2026-06-23",
      "epss": "0.0023",
      "percentile": "0.1361"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-50256\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-11-09T11:15:11.263\",\"lastModified\":\"2025-11-03T23:17:07.083\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnetfilter: nf_reject_ipv6: fix potential crash in nf_send_reset6()\\n\\nI got a syzbot report without a repro [1] crashing in nf_send_reset6()\\n\\nI think the issue is that dev-\u003ehard_header_len is zero, and we attempt\\nlater to push an Ethernet header.\\n\\nUse LL_MAX_HEADER, as other functions in net/ipv6/netfilter/nf_reject_ipv6.c.\\n\\n[1]\\n\\nskbuff: skb_under_panic: text:ffffffff89b1d008 len:74 put:14 head:ffff88803123aa00 data:ffff88803123a9f2 tail:0x3c end:0x140 dev:syz_tun\\n kernel BUG at net/core/skbuff.c:206 !\\nOops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI\\nCPU: 0 UID: 0 PID: 7373 Comm: syz.1.568 Not tainted 6.12.0-rc2-syzkaller-00631-g6d858708d465 #0\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024\\n RIP: 0010:skb_panic net/core/skbuff.c:206 [inline]\\n RIP: 0010:skb_under_panic+0x14b/0x150 net/core/skbuff.c:216\\nCode: 0d 8d 48 c7 c6 60 a6 29 8e 48 8b 54 24 08 8b 0c 24 44 8b 44 24 04 4d 89 e9 50 41 54 41 57 41 56 e8 ba 30 38 02 48 83 c4 20 90 \u003c0f\u003e 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3\\nRSP: 0018:ffffc900045269b0 EFLAGS: 00010282\\nRAX: 0000000000000088 RBX: dffffc0000000000 RCX: cd66dacdc5d8e800\\nRDX: 0000000000000000 RSI: 0000000000000200 RDI: 0000000000000000\\nRBP: ffff88802d39a3d0 R08: ffffffff8174afec R09: 1ffff920008a4ccc\\nR10: dffffc0000000000 R11: fffff520008a4ccd R12: 0000000000000140\\nR13: ffff88803123aa00 R14: ffff88803123a9f2 R15: 000000000000003c\\nFS:  00007fdbee5ff6c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000\\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\nCR2: 0000000000000000 CR3: 000000005d322000 CR4: 00000000003526f0\\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\\nCall Trace:\\n \u003cTASK\u003e\\n  skb_push+0xe5/0x100 net/core/skbuff.c:2636\\n  eth_header+0x38/0x1f0 net/ethernet/eth.c:83\\n  dev_hard_header include/linux/netdevice.h:3208 [inline]\\n  nf_send_reset6+0xce6/0x1270 net/ipv6/netfilter/nf_reject_ipv6.c:358\\n  nft_reject_inet_eval+0x3b9/0x690 net/netfilter/nft_reject_inet.c:48\\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_inet+0x418/0x6b0 net/netfilter/nft_chain_filter.c:161\\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 include/linux/netfilter.h:269 [inline]\\n  NF_HOOK include/linux/netfilter.h:312 [inline]\\n  br_nf_pre_routing_ipv6+0x63e/0x770 net/bridge/br_netfilter_ipv6.c:184\\n  nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]\\n  nf_hook_bridge_pre net/bridge/br_input.c:277 [inline]\\n  br_handle_frame+0x9fd/0x1530 net/bridge/br_input.c:424\\n  __netif_receive_skb_core+0x13e8/0x4570 net/core/dev.c:5562\\n  __netif_receive_skb_one_core net/core/dev.c:5666 [inline]\\n  __netif_receive_skb+0x12f/0x650 net/core/dev.c:5781\\n  netif_receive_skb_internal net/core/dev.c:5867 [inline]\\n  netif_receive_skb+0x1e8/0x890 net/core/dev.c:5926\\n  tun_rx_batched+0x1b7/0x8f0 drivers/net/tun.c:1550\\n  tun_get_user+0x3056/0x47e0 drivers/net/tun.c:2007\\n  tun_chr_write_iter+0x10d/0x1f0 drivers/net/tun.c:2053\\n  new_sync_write fs/read_write.c:590 [inline]\\n  vfs_write+0xa6d/0xc90 fs/read_write.c:683\\n  ksys_write+0x183/0x2b0 fs/read_write.c:736\\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: 0033:0x7fdbeeb7d1ff\\nCode: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 c9 8d 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 \u003c48\u003e 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 1c 8e 02 00 48\\nRSP: 002b:00007fdbee5ff000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001\\nRAX: ffffffffffffffda RBX: 00007fdbeed36058 RCX: 00007fdbeeb7d1ff\\nRDX: 000000000000008e RSI: 0000000020000040 RDI: 00000000000000c8\\nRBP: 00007fdbeebf12be R08: 0000000\\n---truncated---\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfilter: nf_reject_ipv6: soluciona un posible fallo en nf_send_reset6() Recib\u00ed un informe de syzbot sin una reproducci\u00f3n [1] que falla en nf_send_reset6() Creo que el problema es que dev-\u0026gt;hard_header_len es cero, e intentamos m\u00e1s tarde enviar un encabezado Ethernet. Utilice LL_MAX_HEADER, como otras funciones en net/ipv6/netfilter/nf_reject_ipv6.c. [1] skbuff: skb_under_panic: texto:ffffffff89b1d008 longitud:74 puesta:14 cabeza:ffff88803123aa00 datos:ffff88803123a9f2 cola:0x3c fin:0x140 desarrollo:syz_tun ERROR del kernel en net/core/skbuff.c:206 ! Oops: c\u00f3digo de operaci\u00f3n no v\u00e1lido: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 0 UID: 0 PID: 7373 Comm: syz.1.568 No contaminado 6.12.0-rc2-syzkaller-00631-g6d858708d465 #0 Nombre del hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 13/09/2024 RIP: 0010:skb_panic net/core/skbuff.c:206 [en l\u00ednea] RIP: 0010:skb_under_panic+0x14b/0x150 net/core/skbuff.c:216 C\u00f3digo: 0d 8d 48 c7 c6 60 a6 29 8e 48 8b 54 24 08 8b 0c 24 44 8b 44 24 04 4d 89 e9 50 41 54 41 57 41 56 e8 ba 30 38 02 48 83 c4 20 90 \u0026lt;0f\u0026gt; 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 RSP: 0018:ffffc900045269b0 EFLAGS: 00010282 RAX: 000000000000088 RBX: dffffc0000000000 RCX: cd66dacdc5d8e800 RDX: 00000000000000000 RSI: 0000000000000200 RDI: 0000000000000000 RBP: ffff88802d39a3d0 R08: ffffffff8174afec R09: 1ffff920008a4ccc R10: dffffc0000000000 R11: fffff520008a4ccd R12: 0000000000000140 R13: ffff88803123aa00 R14: ffff88803123a9f2 R15: 000000000000003c FS: 00007fdbee5ff6c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000005d322000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Seguimiento de llamadas:  skb_push+0xe5/0x100 net/core/skbuff.c:2636 eth_header+0x38/0x1f0 net/ethernet/eth.c:83 dev_hard_header include/linux/netdevice.h:3208 [en l\u00ednea] nf_send_reset6+0xce6/0x1270 net/ipv6/netfilter/nf_reject_ipv6.c:358 nft_reject_inet_eval+0x3b9/0x690 net/netfilter/nft_reject_inet.c:48 expr_call_ops_eval net/netfilter/nf_tables_core.c:240 [en l\u00ednea] nft_do_chain+0x4ad/0x1da0 net/netfilter/nf_tables_core.c:288 nft_do_chain_inet+0x418/0x6b0 net/netfilter/nft_chain_filter.c:161 nf_hook_entry_hookfn incluye/linux/netfilter.h:154 [en l\u00ednea] nf_hook_slow+0xc3/0x220 net/netfilter/core.c:626 nf_hook incluye/linux/netfilter.h:269 [en l\u00ednea] NF_HOOK incluye/linux/netfilter.h:312 [en l\u00ednea] br_nf_pre_routing_ipv6+0x63e/0x770 net/bridge/br_netfilter_ipv6.c:184 nf_hook_entry_hookfn include/linux/netfilter.h:154 [en l\u00ednea] nf_hook_bridge_pre net/bridge/br_input.c:277 [en l\u00ednea] br_handle_frame+0x9fd/0x1530 net/bridge/br_input.c:424 __netif_receive_skb_core+0x13e8/0x4570 net/core/dev.c:5562 __netif_receive_skb_one_core net/core/dev.c:5666 [en l\u00ednea] __netif_receive_skb+0x12f/0x650 net/core/dev.c:5781 netif_receive_skb_internal net/core/dev.c:5867 [en l\u00ednea] netif_receive_skb+0x1e8/0x890 net/core/dev.c:5926 tun_rx_batched+0x1b7/0x8f0 drivers/net/tun.c:1550 tun_get_user+0x3056/0x47e0 drivers/net/tun.c:2007 tun_chr_write_iter+0x10d/0x1f0 drivers/net/tun.c:2053 new_sync_write fs/read_write.c:590 [en l\u00ednea] vfs_write+0xa6d/0xc90 fs/read_write.c:683 ksys_write+0x183/0x2b0 fs/read_write.c:736 do_syscall_x64 arch/x86/entry/common.c:52 [en l\u00ednea] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fdbeeb7d1ff C\u00f3digo: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 c9 8d 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 \u0026lt;48\u0026gt; 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 1c 8e 02 00 48 RSP: 002b:00007fdbee5ff000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fdbeed36058 RCX: 00007fdbeeb7d1ff RDX: 00000000000008e RSI: 0000000020000040 RDI: 0000000000000c8 RBP: 00007fdbeebf12be R08: 0000000 ---truncado---\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.18\",\"versionEndExcluding\":\"6.1.116\",\"matchCriteriaId\":\"1D3057E6-E2E5-4994-9D3F-4120E62439DB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.60\",\"matchCriteriaId\":\"75088E5E-2400-4D20-915F-7A65C55D9CCD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.11.7\",\"matchCriteriaId\":\"E96F53A4-5E87-4A70-BD9A-BC327828D57F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"7F361E1D-580F-4A2D-A509-7615F73167A1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.12:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"925478D0-3E3D-4E6F-ACD5-09F28D5DF82C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.12:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"3C95E234-D335-4B6C-96BF-E2CEBD8654ED\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.12:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"E0F717D8-3014-4F84-8086-0124B2111379\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.12:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"24DBE6C7-2AAE-4818-AED2-E131F153D2FA\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/4ed234fe793f27a3b151c43d2106df2ff0d81aac\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/4f7b586aae53c2ed820661803da8ce18b1361921\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f85b057e34419e5ec0583a65078a11ccc1d4540a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/fef63832317d9d24e1214cdd8f204d02ebdf8499\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.5, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-50256\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-10-01T20:15:33.931486Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"description\": \"CWE-noinfo Not enough information\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-10-01T15:25:22.516Z\"}}], \"cna\": {\"title\": \"netfilter: nf_reject_ipv6: fix potential crash in nf_send_reset6()\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"c8d7b98bec43faaa6583c3135030be5eb4693acb\", \"lessThan\": \"4f7b586aae53c2ed820661803da8ce18b1361921\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"c8d7b98bec43faaa6583c3135030be5eb4693acb\", \"lessThan\": \"fef63832317d9d24e1214cdd8f204d02ebdf8499\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"c8d7b98bec43faaa6583c3135030be5eb4693acb\", \"lessThan\": \"f85b057e34419e5ec0583a65078a11ccc1d4540a\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"c8d7b98bec43faaa6583c3135030be5eb4693acb\", \"lessThan\": \"4ed234fe793f27a3b151c43d2106df2ff0d81aac\", \"versionType\": \"git\"}], \"programFiles\": [\"net/ipv6/netfilter/nf_reject_ipv6.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.18\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"3.18\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.1.116\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.60\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.11.7\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.11.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/ipv6/netfilter/nf_reject_ipv6.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/4f7b586aae53c2ed820661803da8ce18b1361921\"}, {\"url\": \"https://git.kernel.org/stable/c/fef63832317d9d24e1214cdd8f204d02ebdf8499\"}, {\"url\": \"https://git.kernel.org/stable/c/f85b057e34419e5ec0583a65078a11ccc1d4540a\"}, {\"url\": \"https://git.kernel.org/stable/c/4ed234fe793f27a3b151c43d2106df2ff0d81aac\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnetfilter: nf_reject_ipv6: fix potential crash in nf_send_reset6()\\n\\nI got a syzbot report without a repro [1] crashing in nf_send_reset6()\\n\\nI think the issue is that dev-\u003ehard_header_len is zero, and we attempt\\nlater to push an Ethernet header.\\n\\nUse LL_MAX_HEADER, as other functions in net/ipv6/netfilter/nf_reject_ipv6.c.\\n\\n[1]\\n\\nskbuff: skb_under_panic: text:ffffffff89b1d008 len:74 put:14 head:ffff88803123aa00 data:ffff88803123a9f2 tail:0x3c end:0x140 dev:syz_tun\\n kernel BUG at net/core/skbuff.c:206 !\\nOops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI\\nCPU: 0 UID: 0 PID: 7373 Comm: syz.1.568 Not tainted 6.12.0-rc2-syzkaller-00631-g6d858708d465 #0\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024\\n RIP: 0010:skb_panic net/core/skbuff.c:206 [inline]\\n RIP: 0010:skb_under_panic+0x14b/0x150 net/core/skbuff.c:216\\nCode: 0d 8d 48 c7 c6 60 a6 29 8e 48 8b 54 24 08 8b 0c 24 44 8b 44 24 04 4d 89 e9 50 41 54 41 57 41 56 e8 ba 30 38 02 48 83 c4 20 90 \u003c0f\u003e 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3\\nRSP: 0018:ffffc900045269b0 EFLAGS: 00010282\\nRAX: 0000000000000088 RBX: dffffc0000000000 RCX: cd66dacdc5d8e800\\nRDX: 0000000000000000 RSI: 0000000000000200 RDI: 0000000000000000\\nRBP: ffff88802d39a3d0 R08: ffffffff8174afec R09: 1ffff920008a4ccc\\nR10: dffffc0000000000 R11: fffff520008a4ccd R12: 0000000000000140\\nR13: ffff88803123aa00 R14: ffff88803123a9f2 R15: 000000000000003c\\nFS:  00007fdbee5ff6c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000\\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\nCR2: 0000000000000000 CR3: 000000005d322000 CR4: 00000000003526f0\\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\\nCall Trace:\\n \u003cTASK\u003e\\n  skb_push+0xe5/0x100 net/core/skbuff.c:2636\\n  eth_header+0x38/0x1f0 net/ethernet/eth.c:83\\n  dev_hard_header include/linux/netdevice.h:3208 [inline]\\n  nf_send_reset6+0xce6/0x1270 net/ipv6/netfilter/nf_reject_ipv6.c:358\\n  nft_reject_inet_eval+0x3b9/0x690 net/netfilter/nft_reject_inet.c:48\\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_inet+0x418/0x6b0 net/netfilter/nft_chain_filter.c:161\\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 include/linux/netfilter.h:269 [inline]\\n  NF_HOOK include/linux/netfilter.h:312 [inline]\\n  br_nf_pre_routing_ipv6+0x63e/0x770 net/bridge/br_netfilter_ipv6.c:184\\n  nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]\\n  nf_hook_bridge_pre net/bridge/br_input.c:277 [inline]\\n  br_handle_frame+0x9fd/0x1530 net/bridge/br_input.c:424\\n  __netif_receive_skb_core+0x13e8/0x4570 net/core/dev.c:5562\\n  __netif_receive_skb_one_core net/core/dev.c:5666 [inline]\\n  __netif_receive_skb+0x12f/0x650 net/core/dev.c:5781\\n  netif_receive_skb_internal net/core/dev.c:5867 [inline]\\n  netif_receive_skb+0x1e8/0x890 net/core/dev.c:5926\\n  tun_rx_batched+0x1b7/0x8f0 drivers/net/tun.c:1550\\n  tun_get_user+0x3056/0x47e0 drivers/net/tun.c:2007\\n  tun_chr_write_iter+0x10d/0x1f0 drivers/net/tun.c:2053\\n  new_sync_write fs/read_write.c:590 [inline]\\n  vfs_write+0xa6d/0xc90 fs/read_write.c:683\\n  ksys_write+0x183/0x2b0 fs/read_write.c:736\\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: 0033:0x7fdbeeb7d1ff\\nCode: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 c9 8d 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 \u003c48\u003e 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 1c 8e 02 00 48\\nRSP: 002b:00007fdbee5ff000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001\\nRAX: ffffffffffffffda RBX: 00007fdbeed36058 RCX: 00007fdbeeb7d1ff\\nRDX: 000000000000008e RSI: 0000000020000040 RDI: 00000000000000c8\\nRBP: 00007fdbeebf12be R08: 0000000\\n---truncated---\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.116\", \"versionStartIncluding\": \"3.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.60\", \"versionStartIncluding\": \"3.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.11.7\", \"versionStartIncluding\": \"3.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12\", \"versionStartIncluding\": \"3.18\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T09:50:02.635Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-50256\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-10-01T20:17:24.429Z\", \"dateReserved\": \"2024-10-21T19:36:19.980Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-11-09T10:15:09.551Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.