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CVE-2024-36971

Android Kernel Remote Code Execution

7.8 HIGHActively exploited (CISA KEV)EPSS 2.70%
  1. Published10 Jun 2024
  2. Added to CISA KEV7 Aug 2024
  3. Remediation due28 Aug 2024
Actively exploited (CISA KEV)

Android contains an unspecified vulnerability in the kernel that allows for remote code execution. This vulnerability resides in Linux Kernel and could impact other products, including but not limited to Android OS.

Added to KEV: 7 Aug 2024Federal remediation due: 28 Aug 2024

Description

In the Linux kernel, the following vulnerability has been resolved: net: fix __dst_negative_advice() race __dst_negative_advice() does not enforce proper RCU rules when sk->dst_cache must be cleared, leading to possible UAF. RCU rules are that we must first clear sk->sk_dst_cache, then call dst_release(old_dst). Note that sk_dst_reset(sk) is implementing this protocol correctly, while __dst_negative_advice() uses the wrong order. Given that ip6_negative_advice() has special logic against RTF_CACHE, this means each of the three ->negative_advice() existing methods must perform the sk_dst_reset() themselves. Note the check against NULL dst is centralized in __dst_negative_advice(), there is no need to duplicate it in various callbacks. Many thanks to Clement Lecigne for tracking this issue. This old bug became visible after the blamed commit, using UDP sockets.

CVSS 3.1 breakdown

Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Debian Linux10.0
Linux Kernel≥ 4.20 < 5.4.278 · ≥ 4.6 < 4.19.316 · ≥ 5.11 < 5.15.161 · ≥ 5.16 < 6.1.94

Remediation

Fixed in
Linux Kernel≥ 5.4.278

References

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Frequently asked

Is CVE-2024-36971 being actively exploited?

Yes. CVE-2024-36971 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 7 Aug 2024.

How severe is CVE-2024-36971?

CVE-2024-36971 has a CVSS 3.1 base score of 7.8, rated high. EPSS estimates a 2.70% probability of exploitation.

Which products are affected by CVE-2024-36971?

Affected products include Debian Linux, Linux Kernel.

How do I fix CVE-2024-36971?

Upgrade affected software to a fixed version, for example Linux Kernel 5.4.278 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2024-36971 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.