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CVE-2024-26804

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: net: ip_tunnel: prevent perpetual headroom growth syzkaller triggered following kasan splat: BUG: KASAN: use-after-free in __sk…

Published Apr 4, 2024CWE-416EPSS 0.25%

Overview

CVE-2024-26804 is a high-severity vulnerability. It was published on April 4, 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:

net: ip_tunnel: prevent perpetual headroom growth

syzkaller triggered following kasan splat:

BUG: KASAN: use-after-free in __skb_flow_dissect+0x19d1/0x7a50 net/core/flow_dissector.c:1170

Read of size 1 at addr ffff88812fb4000e by task syz-executor183/5191

[..]

kasan_report+0xda/0x110 mm/kasan/report.c:588

__skb_flow_dissect+0x19d1/0x7a50 net/core/flow_dissector.c:1170

skb_flow_dissect_flow_keys include/linux/skbuff.h:1514 [inline]

___skb_get_hash net/core/flow_dissector.c:1791 [inline]

__skb_get_hash+0xc7/0x540 net/core/flow_dissector.c:1856

skb_get_hash include/linux/skbuff.h:1556 [inline]

ip_tunnel_xmit+0x1855/0x33c0 net/ipv4/ip_tunnel.c:748

ipip_tunnel_xmit+0x3cc/0x4e0 net/ipv4/ipip.c:308

__netdev_start_xmit include/linux/netdevice.h:4940 [inline]

netdev_start_xmit include/linux/netdevice.h:4954 [inline]

xmit_one net/core/dev.c:3548 [inline]

dev_hard_start_xmit+0x13d/0x6d0 net/core/dev.c:3564

__dev_qu

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/049d7989c67e8dd50f07a2096dbafdb41331fb9bRefgit.kernel.org/stable/c/2e95350fe9db9d53c701075060ac8ac883b68aeeRefgit.kernel.org/stable/c/5ae1e9922bbdbaeb9cfbe91085ab75927488ac0fRefgit.kernel.org/stable/c/a0a1db40b23e8ff86dea2786c5ea1470bb23ecb9Refgit.kernel.org/stable/c/ab63de24ebea36fe73ac7121738595d704b66d96Refgit.kernel.org/stable/c/afec0c5cd2ed71ca95a8b36a5e6d03333bf34282Refgit.kernel.org/stable/c/f81e94d2dcd2397137edcb8b85f4c5bed5d22383Refgit.kernel.org/stable/c/049d7989c67e8dd50f07a2096dbafdb41331fb9bRefgit.kernel.org/stable/c/2e95350fe9db9d53c701075060ac8ac883b68aeeRefgit.kernel.org/stable/c/5ae1e9922bbdbaeb9cfbe91085ab75927488ac0f

How CyberStrike helps

Frequently asked questions

What is CVE-2024-26804?

CVE-2024-26804 is a high-severity vulnerability. It was published on April 4, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2024-26804?

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-2024-26804?

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-2024-26804?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-26804 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.

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