5.5
MEDIUM
CVE-2024-49952
Google Compute Engine Netfilter Preemptible Code Use-After-Free
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>

INFO

Published Date :

Oct. 21, 2024, 6:15 p.m.

Last Modified :

Nov. 13, 2024, 12:46 a.m.

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Remotely Exploitable :

No

Impact Score :

3.6

Exploitability Score :

1.8
Affected Products

The following products are affected by CVE-2024-49952 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2024-49952.

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

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2024-49952 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2024-49952 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Nov. 13, 2024

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
    Changed Reference Type https://git.kernel.org/stable/c/38e3fd0c4a2616052eb3c8f4e6f32d1ff47cd663 No Types Assigned https://git.kernel.org/stable/c/38e3fd0c4a2616052eb3c8f4e6f32d1ff47cd663 Patch
    Changed Reference Type https://git.kernel.org/stable/c/4e3542f40f3a94efa59ea328e307c50601ed7065 No Types Assigned https://git.kernel.org/stable/c/4e3542f40f3a94efa59ea328e307c50601ed7065 Patch
    Changed Reference Type https://git.kernel.org/stable/c/50067d8b3f48e4cd4c9e817d3e9a5b5ff3507ca7 No Types Assigned https://git.kernel.org/stable/c/50067d8b3f48e4cd4c9e817d3e9a5b5ff3507ca7 Patch
    Changed Reference Type https://git.kernel.org/stable/c/531754952f5dfc4b141523088147071d6e6112c4 No Types Assigned https://git.kernel.org/stable/c/531754952f5dfc4b141523088147071d6e6112c4 Patch
    Changed Reference Type https://git.kernel.org/stable/c/752e1924604254f1708f3e3700283a86ebdd325d No Types Assigned https://git.kernel.org/stable/c/752e1924604254f1708f3e3700283a86ebdd325d Patch
    Changed Reference Type https://git.kernel.org/stable/c/92ceba94de6fb4cee2bf40b485979c342f44a492 No Types Assigned https://git.kernel.org/stable/c/92ceba94de6fb4cee2bf40b485979c342f44a492 Patch
    Changed Reference Type https://git.kernel.org/stable/c/b40b027a0c0cc1cb9471a13f9730bb2fff12a15b No Types Assigned https://git.kernel.org/stable/c/b40b027a0c0cc1cb9471a13f9730bb2fff12a15b Patch
    Changed Reference Type https://git.kernel.org/stable/c/c0add6ed2cf1c4733cd489efc61faeccd3433b41 No Types Assigned https://git.kernel.org/stable/c/c0add6ed2cf1c4733cd489efc61faeccd3433b41 Patch
    Changed Reference Type https://git.kernel.org/stable/c/f839c5cd348201fec440d987cbca9b979bdb4fa7 No Types Assigned https://git.kernel.org/stable/c/f839c5cd348201fec440d987cbca9b979bdb4fa7 Patch
    Added CWE NIST NVD-CWE-noinfo
    Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.3 up to (excluding) 4.19.323 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 up to (excluding) 5.4.285 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.227 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.168 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.113 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.55 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.10.14 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.11 up to (excluding) 6.11.3 *cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:*
  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Nov. 08, 2024

    Action Type Old Value New Value
    Added Reference kernel.org https://git.kernel.org/stable/c/50067d8b3f48e4cd4c9e817d3e9a5b5ff3507ca7 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/c0add6ed2cf1c4733cd489efc61faeccd3433b41 [No types assigned]
  • CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Oct. 21, 2024

    Action Type Old Value New Value
    Added 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>
    Added Reference kernel.org https://git.kernel.org/stable/c/531754952f5dfc4b141523088147071d6e6112c4 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/38e3fd0c4a2616052eb3c8f4e6f32d1ff47cd663 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/b40b027a0c0cc1cb9471a13f9730bb2fff12a15b [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/4e3542f40f3a94efa59ea328e307c50601ed7065 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/f839c5cd348201fec440d987cbca9b979bdb4fa7 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/752e1924604254f1708f3e3700283a86ebdd325d [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/92ceba94de6fb4cee2bf40b485979c342f44a492 [No types assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2024-49952 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2024-49952 weaknesses.

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
: