Go to homepageCyberStrike

Menu

Star on GitHub · 3.4k
Sign inDownload

CVE-2024-49952

7.8 · HIGH

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…

Published Oct 21, 2024EPSS 0.29%

Overview

CVE-2024-49952 is a high-severity vulnerability. It was published on October 21, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical 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

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/38e3fd0c4a2616052eb3c8f4e6f32d1ff47cd663Refgit.kernel.org/stable/c/4e3542f40f3a94efa59ea328e307c50601ed7065Refgit.kernel.org/stable/c/50067d8b3f48e4cd4c9e817d3e9a5b5ff3507ca7Refgit.kernel.org/stable/c/531754952f5dfc4b141523088147071d6e6112c4Refgit.kernel.org/stable/c/752e1924604254f1708f3e3700283a86ebdd325dRefgit.kernel.org/stable/c/92ceba94de6fb4cee2bf40b485979c342f44a492Refgit.kernel.org/stable/c/b40b027a0c0cc1cb9471a13f9730bb2fff12a15bRefgit.kernel.org/stable/c/c0add6ed2cf1c4733cd489efc61faeccd3433b41Refgit.kernel.org/stable/c/f839c5cd348201fec440d987cbca9b979bdb4fa7Reflists.debian.org/debian-lts-announce/2025/01/msg00001.html

How CyberStrike helps

Frequently asked questions

What is CVE-2024-49952?

CVE-2024-49952 is a high-severity vulnerability. It was published on October 21, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2024-49952?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2024-49952?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2024-49952?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-49952 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

Related HIGH CVEs from 2024

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999
LiveWatch live →