ghsa-w373-phfp-m2jq
Vulnerability from github
Published
2025-01-15 15:31
Modified
2025-01-23 18:31
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

In the Linux kernel, the following vulnerability has been resolved:

mptcp: fix TCP options overflow.

Syzbot reported the following splat:

Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 1 UID: 0 PID: 5836 Comm: sshd Not tainted 6.13.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024 RIP: 0010:_compound_head include/linux/page-flags.h:242 [inline] RIP: 0010:put_page+0x23/0x260 include/linux/mm.h:1552 Code: 90 90 90 90 90 90 90 55 41 57 41 56 53 49 89 fe 48 bd 00 00 00 00 00 fc ff df e8 f8 5e 12 f8 49 8d 5e 08 48 89 d8 48 c1 e8 03 <80> 3c 28 00 74 08 48 89 df e8 8f c7 78 f8 48 8b 1b 48 89 de 48 83 RSP: 0000:ffffc90003916c90 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000008 RCX: ffff888030458000 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: dffffc0000000000 R08: ffffffff898ca81d R09: 1ffff110054414ac R10: dffffc0000000000 R11: ffffed10054414ad R12: 0000000000000007 R13: ffff88802a20a542 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f34f496e800(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9d6ec9ec28 CR3: 000000004d260000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_page_unref include/linux/skbuff_ref.h:43 [inline] __skb_frag_unref include/linux/skbuff_ref.h:56 [inline] skb_release_data+0x483/0x8a0 net/core/skbuff.c:1119 skb_release_all net/core/skbuff.c:1190 [inline] __kfree_skb+0x55/0x70 net/core/skbuff.c:1204 tcp_clean_rtx_queue net/ipv4/tcp_input.c:3436 [inline] tcp_ack+0x2442/0x6bc0 net/ipv4/tcp_input.c:4032 tcp_rcv_state_process+0x8eb/0x44e0 net/ipv4/tcp_input.c:6805 tcp_v4_do_rcv+0x77d/0xc70 net/ipv4/tcp_ipv4.c:1939 tcp_v4_rcv+0x2dc0/0x37f0 net/ipv4/tcp_ipv4.c:2351 ip_protocol_deliver_rcu+0x22e/0x440 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x341/0x5f0 net/ipv4/ip_input.c:233 NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314 NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314 __netif_receive_skb_one_core net/core/dev.c:5672 [inline] __netif_receive_skb+0x2bf/0x650 net/core/dev.c:5785 process_backlog+0x662/0x15b0 net/core/dev.c:6117 __napi_poll+0xcb/0x490 net/core/dev.c:6883 napi_poll net/core/dev.c:6952 [inline] net_rx_action+0x89b/0x1240 net/core/dev.c:7074 handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561 __do_softirq kernel/softirq.c:595 [inline] invoke_softirq kernel/softirq.c:435 [inline] __irq_exit_rcu+0xf7/0x220 kernel/softirq.c:662 irq_exit_rcu+0x9/0x30 kernel/softirq.c:678 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0x57/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0033:0x7f34f4519ad5 Code: 85 d2 74 0d 0f 10 02 48 8d 54 24 20 0f 11 44 24 20 64 8b 04 25 18 00 00 00 85 c0 75 27 41 b8 08 00 00 00 b8 0f 01 00 00 0f 05 <48> 3d 00 f0 ff ff 76 75 48 8b 15 24 73 0d 00 f7 d8 64 89 02 48 83 RSP: 002b:00007ffec5b32ce0 EFLAGS: 00000246 RAX: 0000000000000001 RBX: 00000000000668a0 RCX: 00007f34f4519ad5 RDX: 00007ffec5b32d00 RSI: 0000000000000004 RDI: 0000564f4bc6cae0 RBP: 0000564f4bc6b5a0 R08: 0000000000000008 R09: 0000000000000000 R10: 00007ffec5b32de8 R11: 0000000000000246 R12: 0000564f48ea8aa4 R13: 0000000000000001 R14: 0000564f48ea93e8 R15: 00007ffec5b32d68

Eric noted a probable shinfo->nr_frags corruption, which indeed occurs.

The root cause is a buggy MPTCP option len computation in some circumstances: the ADD_ADDR option should be mutually exclusive with DSS since the blamed commit.

Still, mptcp_established_options_add_addr() tries to set the relevant info in mptcp_out_options, if ---truncated---

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2024-57882"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-01-15T13:15:12Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: fix TCP options overflow.\n\nSyzbot reported the following splat:\n\nOops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN PTI\nKASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]\nCPU: 1 UID: 0 PID: 5836 Comm: sshd Not tainted 6.13.0-rc3-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024\nRIP: 0010:_compound_head include/linux/page-flags.h:242 [inline]\nRIP: 0010:put_page+0x23/0x260 include/linux/mm.h:1552\nCode: 90 90 90 90 90 90 90 55 41 57 41 56 53 49 89 fe 48 bd 00 00 00 00 00 fc ff df e8 f8 5e 12 f8 49 8d 5e 08 48 89 d8 48 c1 e8 03 \u003c80\u003e 3c 28 00 74 08 48 89 df e8 8f c7 78 f8 48 8b 1b 48 89 de 48 83\nRSP: 0000:ffffc90003916c90 EFLAGS: 00010202\nRAX: 0000000000000001 RBX: 0000000000000008 RCX: ffff888030458000\nRDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000\nRBP: dffffc0000000000 R08: ffffffff898ca81d R09: 1ffff110054414ac\nR10: dffffc0000000000 R11: ffffed10054414ad R12: 0000000000000007\nR13: ffff88802a20a542 R14: 0000000000000000 R15: 0000000000000000\nFS:  00007f34f496e800(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007f9d6ec9ec28 CR3: 000000004d260000 CR4: 00000000003526f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n \u003cTASK\u003e\n skb_page_unref include/linux/skbuff_ref.h:43 [inline]\n __skb_frag_unref include/linux/skbuff_ref.h:56 [inline]\n skb_release_data+0x483/0x8a0 net/core/skbuff.c:1119\n skb_release_all net/core/skbuff.c:1190 [inline]\n __kfree_skb+0x55/0x70 net/core/skbuff.c:1204\n tcp_clean_rtx_queue net/ipv4/tcp_input.c:3436 [inline]\n tcp_ack+0x2442/0x6bc0 net/ipv4/tcp_input.c:4032\n tcp_rcv_state_process+0x8eb/0x44e0 net/ipv4/tcp_input.c:6805\n tcp_v4_do_rcv+0x77d/0xc70 net/ipv4/tcp_ipv4.c:1939\n tcp_v4_rcv+0x2dc0/0x37f0 net/ipv4/tcp_ipv4.c:2351\n ip_protocol_deliver_rcu+0x22e/0x440 net/ipv4/ip_input.c:205\n ip_local_deliver_finish+0x341/0x5f0 net/ipv4/ip_input.c:233\n NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314\n NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314\n __netif_receive_skb_one_core net/core/dev.c:5672 [inline]\n __netif_receive_skb+0x2bf/0x650 net/core/dev.c:5785\n process_backlog+0x662/0x15b0 net/core/dev.c:6117\n __napi_poll+0xcb/0x490 net/core/dev.c:6883\n napi_poll net/core/dev.c:6952 [inline]\n net_rx_action+0x89b/0x1240 net/core/dev.c:7074\n handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561\n __do_softirq kernel/softirq.c:595 [inline]\n invoke_softirq kernel/softirq.c:435 [inline]\n __irq_exit_rcu+0xf7/0x220 kernel/softirq.c:662\n irq_exit_rcu+0x9/0x30 kernel/softirq.c:678\n instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]\n sysvec_apic_timer_interrupt+0x57/0xc0 arch/x86/kernel/apic/apic.c:1049\n asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702\nRIP: 0033:0x7f34f4519ad5\nCode: 85 d2 74 0d 0f 10 02 48 8d 54 24 20 0f 11 44 24 20 64 8b 04 25 18 00 00 00 85 c0 75 27 41 b8 08 00 00 00 b8 0f 01 00 00 0f 05 \u003c48\u003e 3d 00 f0 ff ff 76 75 48 8b 15 24 73 0d 00 f7 d8 64 89 02 48 83\nRSP: 002b:00007ffec5b32ce0 EFLAGS: 00000246\nRAX: 0000000000000001 RBX: 00000000000668a0 RCX: 00007f34f4519ad5\nRDX: 00007ffec5b32d00 RSI: 0000000000000004 RDI: 0000564f4bc6cae0\nRBP: 0000564f4bc6b5a0 R08: 0000000000000008 R09: 0000000000000000\nR10: 00007ffec5b32de8 R11: 0000000000000246 R12: 0000564f48ea8aa4\nR13: 0000000000000001 R14: 0000564f48ea93e8 R15: 00007ffec5b32d68\n \u003c/TASK\u003e\n\nEric noted a probable shinfo-\u003enr_frags corruption, which indeed\noccurs.\n\nThe root cause is a buggy MPTCP option len computation in some\ncircumstances: the ADD_ADDR option should be mutually exclusive\nwith DSS since the blamed commit.\n\nStill, mptcp_established_options_add_addr() tries to set the\nrelevant info in mptcp_out_options, if \n---truncated---",
  "id": "GHSA-w373-phfp-m2jq",
  "modified": "2025-01-23T18:31:17Z",
  "published": "2025-01-15T15:31:24Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-57882"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/09ba95321a269019b5aa8e0c3bc80cf86d91fd18"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/53fe947f67c93a5334aed3a7259fcc8a204f8bb6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/88b01048f286bb522f524ad99943ba86797d6514"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cbb26f7d8451fe56ccac802c6db48d16240feebd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fb08e6b0ba284e3dcdc9378de26dcb51d90710f5"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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