CVE-2024-36971
Android Kernel Remote Code Execution Vulnerability
This vulnerability is in the CISA Known Exploited Vulnerabilities catalog: attackers are using it. If you run Kernel, fix it now.
CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
US federal civilian agencies must remediate by Aug 28, 2024.
Patch status
Official fix available since
Apply the vendor's update to every affected system. Check the fixed-in versions below where known.
Basis: NVD patch reference
- Patch or advisory on git.kernel.org (opens in a new tab)
- Patch or advisory on git.kernel.org (opens in a new tab)
- Patch or advisory on git.kernel.org (opens in a new tab)
- Patch or advisory on git.kernel.org (opens in a new tab)
- Patch or advisory on git.kernel.org (opens in a new tab)
- Patch or advisory on git.kernel.org (opens in a new tab)
- Patch or advisory on git.kernel.org (opens in a new tab)
- Patch or advisory on git.kernel.org (opens in a new tab)
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.
Source: NIST National Vulnerability Database. Official vulnerability data, reproduced as published.
Affected products
| Product | Vendor | Affected versions | Fixed in | Source |
|---|---|---|---|---|
| Kernel | Android | — | — | KEV |
| Linux | Linux | >= 4.6, < 4.19.316; >= 4.20, < 5.4.278; >= 5.5, < 5.10.219; >= 5.11, < 5.15.161; >= 5.16, < 6.1.94; >= 6.2, < 6.6.34 | 4.19.316; 5.4.278; 5.10.219; 5.15.161; 6.1.94; 6.6.34 | NVD |
Sources: KEV = CISA Known Exploited Vulnerabilities catalog; NVD = NIST National Vulnerability Database.
Intelligence timeline
Developments from the last 30 days, newest first.
- CVSS scoredUpdateKEV
CVE-2024-36971 scored CVSS 7.8: Android Kernel, Android Kernel Remote Code Execution Vulnerability
CISA lists this as exploited in the wild. Unpatched Kernel systems are exposed to active attacks now.
Basis: NIST National Vulnerability Database
- Patch releasedUpdateKEV
Patch released for CVE-2024-36971: Android Kernel, Android Kernel Remote Code Execution Vulnerability
An official fix is now available for Android Kernel. This vulnerability is being exploited, so apply it promptly.
Basis: NVD patch reference
1 earlier event is available with a subscription. See plans.
Coverage
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