Bug 2267914 (CVE-2021-47103) - CVE-2021-47103 kernel: inet: fully convert sk->sk_rx_dst to RCU rules
Summary: CVE-2021-47103 kernel: inet: fully convert sk->sk_rx_dst to RCU rules
Keywords:
Status: NEW
Alias: CVE-2021-47103
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
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Depends On:
Blocks: 2268181
TreeView+ depends on / blocked
 
Reported: 2024-03-05 14:36 UTC by Zack Miele
Modified: 2024-06-28 12:42 UTC (History)
50 users (show)

Fixed In Version: kernel 4.9.331, kernel 4.14.296, kernel 4.19.262, kernel 5.4.220, kernel 5.10.150, kernel 5.15.12, kernel 5.16
Doc Type: If docs needed, set a value
Doc Text:
A use-after-free vulnerability was found in the TCP IP protocol in the Linux Kernel, where a delete operation of the RCU-protected pointer is supposed to clear the pointer before the call_rcu()/synchronize_rcu() guarding the actual memory freeing. This flaw allows a local attacker to crash the system or leak kernel internal information.
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Description Zack Miele 2024-03-05 14:36:52 UTC 
In the Linux kernel, the following vulnerability has been resolved:

inet: fully convert sk->sk_rx_dst to RCU rules

The Linux kernel CVE team has assigned CVE-2021-47103 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024030416-CVE-2021-47103-4314@gregkh/T
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