CVE-2022-49085 Details
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/
A use-after-free vulnerability has been identified in the Linux kernel's DRBD component. The issue arises in the 'get_initial_state' function, where a socket buffer (skb) is freed but then improperly accessed, leading to potential memory corruption. This vulnerability can be exploited because the same skb can be freed in related notification functions, creating additional use-after-free scenarios.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Feb 27, 2025References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/0489700bfeb1e53eb2039c2291c67e71b0b40103 | kernel.org | Patch |
| https://git.kernel.org/stable/c/188fe6b26765edbad4055611c0f788b6870f4024 | kernel.org | Patch |
| https://git.kernel.org/stable/c/226e993c39405292781bfcf4b039a8db56aab362 | kernel.org | Patch |
| https://git.kernel.org/stable/c/594205b4936771a250f9d141e7e0fff21c3dd2d9 | kernel.org | Patch |
| https://git.kernel.org/stable/c/a972c768723359ec995579902473028fe3cd64b1 | kernel.org | Patch |
| https://git.kernel.org/stable/c/aadb22ba2f656581b2f733deb3a467c48cc618f6 | kernel.org | Patch |
| https://git.kernel.org/stable/c/b6a4055036eed1f5e239ce3d8b0db1ce38bba447 | kernel.org | Patch |
| https://git.kernel.org/stable/c/dcf6be17b5c53b741898d2223b23e66d682de300 | kernel.org | Patch |
| https://git.kernel.org/stable/c/de63e74da2333b4068bb79983e632db730fea97e | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-416 | Use After Free | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 4.5, < 4.9.311 >= 4.10, < 4.14.276 >= 4.15, < 4.19.238 >= 4.20, < 5.4.189 >= 5.5, < 5.10.111 >= 5.11, < 5.15.34 >= 5.16, < 5.16.20 >= 5.17, < 5.17.3 5.18 rc1 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Mar 25, 2025 | Initial Analysis | [email protected] |
| Feb 27, 2025 | CVE Modified | CISA-ADP |
| Feb 26, 2025 | New CVE Received | kernel.org |