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.
References
Configurations
Configuration 1 (hide)
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History
08 Aug 2024, 14:49
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/2295a7ef5c8c49241bff769e7826ef2582e532a6 - Patch | |
| References | () https://git.kernel.org/stable/c/eacb8b195579c174a6d3e12a9690b206eb7f28cf - Patch | |
| References | () https://git.kernel.org/stable/c/db0082825037794c5dba9959c9de13ca34cc5e72 - Patch | |
| References | () https://git.kernel.org/stable/c/5af198c387128a9d2ddd620b0f0803564a4d4508 - Patch | |
| References | () https://git.kernel.org/stable/c/051c0bde9f0450a2ec3d62a86d2a0d2fad117f13 - Patch | |
| References | () https://git.kernel.org/stable/c/81dd3c82a456b0015461754be7cb2693991421b4 - Patch | |
| CPE |
15 Jul 2024, 07:15
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| References |
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27 Jun 2024, 12:15
| Type | Values Removed | Values Added |
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| References |
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16 Jun 2024, 13:15
| Type | Values Removed | Values Added |
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| References |
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12 Jun 2024, 15:43
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:o:linux:linux_kernel:6.10.0:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
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| CWE | CWE-416 | |
| First Time |
Linux
Linux linux Kernel |
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| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.8 |
| References | () https://git.kernel.org/stable/c/92f1655aa2b2294d0b49925f3b875a634bd3b59e - Patch | |
| References | () https://git.kernel.org/stable/c/b8af8e6118a6605f0e495a58d591ca94a85a50fc - Patch |
12 Jun 2024, 10:15
| Type | Values Removed | Values Added |
|---|---|---|
| References |
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10 Jun 2024, 09:15
| Type | Values Removed | Values Added |
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| New CVE |
Information
Published : 2024-06-10 09:15
Updated : 2025-01-27 21:43
NVD link : CVE-2024-36971
Mitre link : CVE-2024-36971
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-416
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