CVE-2024-49952

MEDIUM EPSS 19.4%
Published Oct 21, 20241y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Oct 21, 2024 1y ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: prevent nf_skb_duplicated corruption syzbot found that nf_dup_ipv4() or nf_dup_ipv6() could write per-cpu variable nf_skb_duplicated in an unsafe way [1]. Disabling preemption as hinted by the splat is not enough, we have to disable soft interrupts as well. [1] BUG: using __this_cpu_write() in preemptible [00000000] code: syz.4.282/6316 caller is nf_dup_ipv4+0x651/0x8f0 net/ipv4/netfilter/nf_dup_ipv4.c:87 CPU: 0 UID: 0 PID: 6316 Comm: syz.4.282 Not tainted 6.11.0-rc7-syzkaller-00104-g7052622fccb1 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 check_preemption_disabled+0x10e/0x120 lib/smp_processor_id.c:49 nf_dup_ipv4+0x651/0x8f0 net/ipv4/netfilter/nf_dup_ipv4.c:87 nft_dup_ipv4_eval+0x1db/0x300 net/ipv4/netfilter/nft_dup_ipv4.c:30 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_ipv4+0x202/0x320 net/netfilter/nft_chain_filter.c:23 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_slow+0xc3/0x220 net/netfilter/core.c:626 nf_hook+0x2c4/0x450 include/linux/netfilter.h:269 NF_HOOK_COND include/linux/netfilter.h:302 [inline] ip_output+0x185/0x230 net/ipv4/ip_output.c:433 ip_local_out net/ipv4/ip_output.c:129 [inline] ip_send_skb+0x74/0x100 net/ipv4/ip_output.c:1495 udp_send_skb+0xacf/0x1650 net/ipv4/udp.c:981 udp_sendmsg+0x1c21/0x2a60 net/ipv4/udp.c:1269 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x1a6/0x270 net/socket.c:745 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2597 ___sys_sendmsg net/socket.c:2651 [inline] __sys_sendmmsg+0x3b2/0x740 net/socket.c:2737 __do_sys_sendmmsg net/socket.c:2766 [inline] __se_sys_sendmmsg net/socket.c:2763 [inline] __x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2763 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: 0033:0x7f4ce4f7def9 Code: 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 RSP: 002b:00007f4ce5d4a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007f4ce5135f80 RCX: 00007f4ce4f7def9 RDX: 0000000000000001 RSI: 0000000020005d40 RDI: 0000000000000006 RBP: 00007f4ce4ff0b76 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f4ce5135f80 R15: 00007ffd4cbc6d68 </TASK>

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
19.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 9

VendorProductVersionRange
linuxlinux_kernel*≥4.3  –  <4.19.323
linuxlinux_kernel*≥4.20  –  <5.4.285
linuxlinux_kernel*≥5.5  –  <5.10.227
linuxlinux_kernel*≥5.11  –  <5.15.168
linuxlinux_kernel*≥5.16  –  <6.1.113
linuxlinux_kernel*≥6.2  –  <6.6.55
linuxlinux_kernel*≥6.7  –  <6.10.14
linuxlinux_kernel*≥6.11  –  <6.11.3
linuxlinux_kernel6.12any

References 14

  • cert-portal.siemens.com https://cert-portal.siemens.com/productcert/html/ssa-265688.html
  • cert-portal.siemens.com https://cert-portal.siemens.com/productcert/html/ssa-355557.html
  • cert-portal.siemens.com https://cert-portal.siemens.com/productcert/html/ssa-398330.html
  • git.kernel.org https://git.kernel.org/stable/c/38e3fd0c4a2616052eb3c8f4e6f32d1ff47cd663
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4e3542f40f3a94efa59ea328e307c50601ed7065
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/50067d8b3f48e4cd4c9e817d3e9a5b5ff3507ca7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/531754952f5dfc4b141523088147071d6e6112c4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/752e1924604254f1708f3e3700283a86ebdd325d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/92ceba94de6fb4cee2bf40b485979c342f44a492
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b40b027a0c0cc1cb9471a13f9730bb2fff12a15b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c0add6ed2cf1c4733cd489efc61faeccd3433b41
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f839c5cd348201fec440d987cbca9b979bdb4fa7
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/38e3fd0c4a2616052eb3c8f4e6f32d1ff47cd663
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4e3542f40f3a94efa59ea328e307c50601ed7065
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/50067d8b3f48e4cd4c9e817d3e9a5b5ff3507ca7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/531754952f5dfc4b141523088147071d6e6112c4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/752e1924604254f1708f3e3700283a86ebdd325d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/92ceba94de6fb4cee2bf40b485979c342f44a492
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b40b027a0c0cc1cb9471a13f9730bb2fff12a15b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c0add6ed2cf1c4733cd489efc61faeccd3433b41
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f839c5cd348201fec440d987cbca9b979bdb4fa7
    Patch