// For flags

CVE-2023-52837

nbd: fix uaf in nbd_open

Severity Score

"-"
*CVSS v-

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track
*SSVC
Descriptions

In the Linux kernel, the following vulnerability has been resolved:

nbd: fix uaf in nbd_open

Commit 4af5f2e03013 ("nbd: use blk_mq_alloc_disk and
blk_cleanup_disk") cleans up disk by blk_cleanup_disk() and it won't set
disk->private_data as NULL as before. UAF may be triggered in nbd_open()
if someone tries to open nbd device right after nbd_put() since nbd has
been free in nbd_dev_remove().

Fix this by implementing ->free_disk and free private data in it.

En el kernel de Linux, se resolvió la siguiente vulnerabilidad: nbd: corrija uaf en nbd_open Commit 4af5f2e03013 ("nbd: use blk_mq_alloc_disk y blk_cleanup_disk") limpia el disco mediante blk_cleanup_disk() y no configurará disk->private_data como NULL como antes. UAF puede activarse en nbd_open() si alguien intenta abrir el dispositivo nbd justo después de nbd_put() ya que nbd ha estado libre en nbd_dev_remove(). Solucione este problema implementando ->free_disk y datos privados gratuitos en él.

*Credits: N/A
CVSS Scores
Attack Vector
-
Attack Complexity
-
Privileges Required
-
User Interaction
-
Scope
-
Confidentiality
-
Integrity
-
Availability
-
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2024-05-21 CVE Reserved
  • 2024-05-21 CVE Published
  • 2024-05-22 EPSS Updated
  • 2024-08-02 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
CAPEC
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"
 >= 5.14 < 6.1.63
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.14 < 6.1.63"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 5.14 < 6.5.12
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.14 < 6.5.12"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 5.14 < 6.6.2
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.14 < 6.6.2"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 5.14 < 6.7
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.14 < 6.7"
en
Affected