CVE - CVE-2022-49085

CVE-ID
CVE-2022-49085	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: drbd: Fix five use after free bugs in get_initial_state In get_initial_state, it calls notify_initial_state_done(skb,..) if cb->args[5]==1. If genlmsg_put() failed in notify_initial_state_done(), the skb will be freed by nlmsg_free(skb). Then get_initial_state will goto out and the freed skb will be used by return value skb->len, which is a uaf bug. What's worse, the same problem goes even further: skb can also be freed in the notify__state_change -> notify__state calls below. Thus 4 additional uaf bugs happened. My patch lets the problem callee functions: notify_initial_state_done and notify_*_state_change return an error code if errors happen. So that the error codes could be propagated and the uaf bugs can be avoid. v2 reports a compilation warning. This v3 fixed this warning and built successfully in my local environment with no additional warnings. v2: https://lore.kernel.org/patchwork/patch/1435218/
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/0489700bfeb1e53eb2039c2291c67e71b0b40103 URL:https://git.kernel.org/stable/c/0489700bfeb1e53eb2039c2291c67e71b0b40103 MISC:https://git.kernel.org/stable/c/188fe6b26765edbad4055611c0f788b6870f4024 URL:https://git.kernel.org/stable/c/188fe6b26765edbad4055611c0f788b6870f4024 MISC:https://git.kernel.org/stable/c/226e993c39405292781bfcf4b039a8db56aab362 URL:https://git.kernel.org/stable/c/226e993c39405292781bfcf4b039a8db56aab362 MISC:https://git.kernel.org/stable/c/594205b4936771a250f9d141e7e0fff21c3dd2d9 URL:https://git.kernel.org/stable/c/594205b4936771a250f9d141e7e0fff21c3dd2d9 MISC:https://git.kernel.org/stable/c/a972c768723359ec995579902473028fe3cd64b1 URL:https://git.kernel.org/stable/c/a972c768723359ec995579902473028fe3cd64b1 MISC:https://git.kernel.org/stable/c/aadb22ba2f656581b2f733deb3a467c48cc618f6 URL:https://git.kernel.org/stable/c/aadb22ba2f656581b2f733deb3a467c48cc618f6 MISC:https://git.kernel.org/stable/c/b6a4055036eed1f5e239ce3d8b0db1ce38bba447 URL:https://git.kernel.org/stable/c/b6a4055036eed1f5e239ce3d8b0db1ce38bba447 MISC:https://git.kernel.org/stable/c/dcf6be17b5c53b741898d2223b23e66d682de300 URL:https://git.kernel.org/stable/c/dcf6be17b5c53b741898d2223b23e66d682de300 MISC:https://git.kernel.org/stable/c/de63e74da2333b4068bb79983e632db730fea97e URL:https://git.kernel.org/stable/c/de63e74da2333b4068bb79983e632db730fea97e
Assigning CNA
kernel.org
Date Record Created
20250226	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20250226)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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