CVE-2022-49085

Feb. 27, 2025, 6:15 p.m.

7.8
High

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/

Product(s) Impacted

Product Versions
Linux kernel
  • []

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-416
Use After Free
Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.

References

https://git.kernel.org/stable/c/0489700bfeb1e53eb2039c2291c67e71b0b40103
https://git.kernel.org/stable/c/188fe6b26765edbad4055611c0f788b6870f4024
https://git.kernel.org/stable/c/226e993c39405292781bfcf4b039a8db56aab362
https://git.kernel.org/stable/c/594205b4936771a250f9d141e7e0fff21c3dd2d9
https://git.kernel.org/stable/c/a972c768723359ec995579902473028fe3cd64b1
https://git.kernel.org/stable/c/aadb22ba2f656581b2f733deb3a467c48cc618f6
https://git.kernel.org/stable/c/b6a4055036eed1f5e239ce3d8b0db1ce38bba447
https://git.kernel.org/stable/c/dcf6be17b5c53b741898d2223b23e66d682de300
https://git.kernel.org/stable/c/de63e74da2333b4068bb79983e632db730fea97e

Tags

416baaa9-dc9f-4396-8d5f-8c081fb06d67
CWE-416
2025-02-26
CVE-2022-49085

CVSS Score

7.8 / 10

CVSS Data - 3.1

  • Attack Vector: LOCAL
  • Attack Complexity: LOW
  • Privileges Required: LOW
  • Scope: UNCHANGED
  • Confidentiality Impact: HIGH
  • Integrity Impact: HIGH
  • Availability Impact: HIGH

    • CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

    View Vector String

Timeline

Published: Feb. 26, 2025, 7 a.m.
Last Modified: Feb. 27, 2025, 6:15 p.m.

Status : Awaiting Analysis

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

416baaa9-dc9f-4396-8d5f-8c081fb06d67

*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.