Vulnerability Details : CVE-2022-0185

Potential exploit
A heap-based buffer overflow flaw was found in the way the legacy_parse_param function in the Filesystem Context functionality of the Linux kernel verified the supplied parameters length. An unprivileged (in case of unprivileged user namespaces enabled, otherwise needs namespaced CAP_SYS_ADMIN privilege) local user able to open a filesystem that does not support the Filesystem Context API (and thus fallbacks to legacy handling) could use this flaw to escalate their privileges on the system.
Published 2022-02-11 18:15:11
Updated 2024-09-04 01:00:01
Source Red Hat, Inc.
View at NVD,   CVE.org
Vulnerability category: Overflow

Products affected by CVE-2022-0185

CVE-2022-0185 is in the CISA Known Exploited Vulnerabilities Catalog

CISA vulnerability name:
Linux Kernel Heap-Based Buffer Overflow Vulnerability
CISA required action:
Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.
CISA description:
Linux kernel contains a heap-based buffer overflow vulnerability in the legacy_parse_param function in the Filesystem Context functionality. This allows an attacker to open a filesystem that does not support the Filesystem Context API and ultimately escalate privileges.
Notes:
This vulnerability affects a common open-source component, third-party library, or a protocol used by different products. For more information, please see: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=722d94847de2; https://nvd.nist.gov/vuln/detail/CVE-2022-0185
Added on 2024-08-21 Action due date 2024-09-11

Exploit prediction scoring system (EPSS) score for CVE-2022-0185

EPSS FAQ
0.60%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 68 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2022-0185

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
7.2
 HIGH AV:L/AC:L/Au:N/C:C/I:C/A:C
3.9
10.0
 NIST
8.4
 HIGH CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
2.5
5.9
 134c704f-9b21-4f2e-91b3-4a467353bcc0 2024-08-22
8.4
 HIGH CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
2.5
5.9
 NIST

CWE ids for CVE-2022-0185

  • The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
    Assigned by:
    • nvd@nist.gov (Secondary)
    • secalert@redhat.com (Secondary)
  • The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2022-0185

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