CVE-2022-49053

scsi: target: tcmu: Fix possible page UAF

Severity Score

7.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track*

*SSVC

Descriptions

MITRE
TN

In the Linux kernel, the following vulnerability has been resolved: scsi: target: tcmu: Fix possible page UAF tcmu_try_get_data_page() looks up pages under cmdr_lock, but it does not
take refcount properly and just returns page pointer. When
tcmu_try_get_data_page() returns, the returned page may have been freed by
tcmu_blocks_release(). We need to get_page() under cmdr_lock to avoid concurrent
tcmu_blocks_release().

In the Linux kernel, the following vulnerability has been resolved: scsi: target: tcmu: Fix possible page UAF tcmu_try_get_data_page() looks up pages under cmdr_lock, but it does not take refcount properly and just returns page pointer. When tcmu_try_get_data_page() returns, the returned page may have been freed by tcmu_blocks_release(). We need to get_page() under cmdr_lock to avoid concurrent tcmu_blocks_release().

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

Single

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:Track*

Exploitation

None

Automatable

Tech. Impact

Total

* Organization's Worst-case Scenario

Timeline

2025-02-26 CVE Reserved
2025-02-26 CVE Published
2025-02-27 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-416: Use After Free

CAPEC

References (7)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/d7c5d79e50be6e06b669141e3db1f977a0dd4e8e	2022-04-20
https://git.kernel.org/stable/c/e3e0e067d5b34e4a68e3cc55f8eebc413f56f8ed	2022-04-20
https://git.kernel.org/stable/c/fb7a5115422fbd6a4d505e8844f1ef5529f10489	2022-04-20
https://git.kernel.org/stable/c/aec36b98a1bbaa84bfd8299a306e4c12314af626	2022-04-20
https://git.kernel.org/stable/c/b7f3b5d70c834f49f7d87a2f2ed1c6284d9a0322	2022-04-20
https://git.kernel.org/stable/c/a9564d84ed9f6ee71017d062d0d2182154294a4b	2022-04-20
https://git.kernel.org/stable/c/a6968f7a367f128d120447360734344d5a3d5336	2022-03-30

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 4.14.276 Search vendor "Linux" for product "Linux Kernel" and version " < 4.14.276"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 4.19.239 Search vendor "Linux" for product "Linux Kernel" and version " < 4.19.239"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 5.4.190 Search vendor "Linux" for product "Linux Kernel" and version " < 5.4.190"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 5.10.112 Search vendor "Linux" for product "Linux Kernel" and version " < 5.10.112"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 5.15.35 Search vendor "Linux" for product "Linux Kernel" and version " < 5.15.35"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 5.17.4 Search vendor "Linux" for product "Linux Kernel" and version " < 5.17.4"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 5.18 Search vendor "Linux" for product "Linux Kernel" and version " < 5.18"		en		Affected