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/

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact total

Affected Vendors & Products

Vendors Products
Linux
  • Linux Kernel

Configuration 1 [-]

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.18:rc1:*:*:*:*:*:*

No data.

References
Link Providers
https://git.kernel.org/stable/c/0489700bfeb1e53eb2039c2291c67e71b0b40103 cve-icon cve-icon
https://git.kernel.org/stable/c/188fe6b26765edbad4055611c0f788b6870f4024 cve-icon cve-icon
https://git.kernel.org/stable/c/226e993c39405292781bfcf4b039a8db56aab362 cve-icon cve-icon
https://git.kernel.org/stable/c/594205b4936771a250f9d141e7e0fff21c3dd2d9 cve-icon cve-icon
https://git.kernel.org/stable/c/a972c768723359ec995579902473028fe3cd64b1 cve-icon cve-icon
https://git.kernel.org/stable/c/aadb22ba2f656581b2f733deb3a467c48cc618f6 cve-icon cve-icon
https://git.kernel.org/stable/c/b6a4055036eed1f5e239ce3d8b0db1ce38bba447 cve-icon cve-icon
https://git.kernel.org/stable/c/dcf6be17b5c53b741898d2223b23e66d682de300 cve-icon cve-icon
https://git.kernel.org/stable/c/de63e74da2333b4068bb79983e632db730fea97e cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2025022657-CVE-2022-49085-a9d4@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2022-49085 cve-icon
https://www.cve.org/CVERecord?id=CVE-2022-49085 cve-icon
History

Tue, 25 Mar 2025 16:45:00 +0000

Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.18:rc1:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel

Tue, 04 Mar 2025 03:45:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Thu, 27 Feb 2025 18:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

 cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

Wed, 26 Feb 2025 13:45:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Low

Wed, 26 Feb 2025 02:15:00 +0000

Type Values Removed Values Added
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/
Title drbd: Fix five use after free bugs in get_initial_state
References
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2025-02-26T01:54:43.579Z

Updated: 2025-02-27T18:02:29.848Z

Reserved: 2025-02-26T01:49:39.248Z

Link: CVE-2022-49085

cve-icon Vulnrichment

Updated: 2025-02-27T17:59:14.040Z

cve-icon NVD

Status : Analyzed

Published: 2025-02-26T07:00:45.833

Modified: 2025-03-25T16:21:29.173

Link: CVE-2022-49085

cve-icon Redhat

Severity : Low

Publid Date: 2025-02-26T00:00:00Z

Links: CVE-2022-49085 - Bugzilla