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CVE-2024-26882

7.3 · HIGH

In the Linux kernel, the following vulnerability has been resolved: net: ip_tunnel: make sure to pull inner header in ip_tunnel_rcv() Apply the same fix than ones found in : 8d975c15c0cd ("ip6_t…

Published Apr 17, 2024CWE-457EPSS 0.69%

Overview

CVE-2024-26882 is a high-severity vulnerability. It was published on April 17, 2024 and has a CVSS 3.1 base score of 7.3 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.3, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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

net: ip_tunnel: make sure to pull inner header in ip_tunnel_rcv()

Apply the same fix than ones found in :

8d975c15c0cd ("ip6_tunnel: make sure to pull inner header in __ip6_tnl_rcv()")

1ca1ba465e55 ("geneve: make sure to pull inner header in geneve_rx()")

We have to save skb->network_header in a temporary variable

in order to be able to recompute the network_header pointer

after a pskb_inet_may_pull() call.

pskb_inet_may_pull() makes sure the needed headers are in skb->head.

syzbot reported:

BUG: KMSAN: uninit-value in __INET_ECN_decapsulate include/net/inet_ecn.h:253 [inline]

BUG: KMSAN: uninit-value in INET_ECN_decapsulate include/net/inet_ecn.h:275 [inline]

BUG: KMSAN: uninit-value in IP_ECN_decapsulate include/net/inet_ecn.h:302 [inline]

BUG: KMSAN: uninit-value in ip_tunnel_rcv+0xed9/0x2ed0 net/ipv4/ip_tunnel.c:409

__INET_ECN_decapsulate include/net/inet_ecn.h:253 [inline]

INET_ECN_decapsulate include

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/5c03387021cfa3336b97e0dcba38029917a8af2aRefgit.kernel.org/stable/c/60044ab84836359534bd7153b92e9c1584140e4aRefgit.kernel.org/stable/c/77fd5294ea09b21f6772ac954a121b87323cec80Refgit.kernel.org/stable/c/b0ec2abf98267f14d032102551581c833b0659d3Refgit.kernel.org/stable/c/c4c857723b37c20651300b3de4ff25059848b4b0Refgit.kernel.org/stable/c/ca914f1cdee8a85799942c9b0ce5015bbd6844e1Refgit.kernel.org/stable/c/ec6bb01e02cbd47781dd90775b631a1dc4bd9d2bRefgit.kernel.org/stable/c/f6723d8dbfdc10c784a56748f86a9a3cd410dbd5Refgit.kernel.org/stable/c/5c03387021cfa3336b97e0dcba38029917a8af2aRefgit.kernel.org/stable/c/60044ab84836359534bd7153b92e9c1584140e4a

How CyberStrike helps

Frequently asked questions

What is CVE-2024-26882?

CVE-2024-26882 is a high-severity vulnerability. It was published on April 17, 2024 and has a CVSS 3.1 base score of 7.3 (HIGH).

How severe is CVE-2024-26882?

This vulnerability has a CVSS 3.1 base score of 7.3, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2024-26882?

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-2024-26882?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-26882 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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