CVE-2022-50864

nilfs2: fix shift-out-of-bounds due to too large exponent of block size

Severity Score

"-"

*CVSS v-

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix shift-out-of-bounds due to too large exponent of block size If field s_log_block_size of superblock data is corrupted and too large,
init_nilfs() and load_nilfs() still can trigger a shift-out-of-bounds
warning followed by a kernel panic (if panic_on_warn is set): shift exponent 38973 is too large for 32-bit type 'int' Call Trace: <TASK> dump_stack_lvl+0xcd/0x134 ubsan_epilogue+0xb/0x50 __ubsan_handle_shift_out_of_bounds.cold.12+0x17b/0x1f5 init_nilfs.cold.11+0x18/0x1d [nilfs2] nilfs_mount+0x9b5/0x12b0 [nilfs2] ... This fixes the issue by adding and using a new helper function for getting
block size with sanity check.

The SUSE Linux Enterprise 15 SP5 RT kernel was updated to fix various security issues.

*Credits: N/A

CVSS Scores

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2025-12-30 CVE Reserved
2025-12-30 CVE Published
2026-01-02 CVE Updated
2026-01-31 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (6)

URL	Tag	Source
https://git.kernel.org/stable/c/8a9d2191e9f43bbcd256a9a6871bd73434c83f2f	Vuln. Introduced

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/ec93b5430ec0f60877a5388bb023d60624f9ab9f	2023-01-14
https://git.kernel.org/stable/c/8b6ef451b5701b37d9a5905534595776a662edfc	2022-12-31
https://git.kernel.org/stable/c/ddb6615a168f97b91175e00eda4c644741cf531c	2022-12-31
https://git.kernel.org/stable/c/a16731fa1b96226c75bbf18e73513b14fc318360	2022-12-31
https://git.kernel.org/stable/c/ebeccaaef67a4895d2496ab8d9c2fb8d89201211	2022-11-18

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"				>= 2.6.30 < 5.10.163 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.30 < 5.10.163"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 2.6.30 < 5.15.86 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.30 < 5.15.86"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 2.6.30 < 6.0.16 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.30 < 6.0.16"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 2.6.30 < 6.1.2 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.30 < 6.1.2"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 2.6.30 < 6.2 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.30 < 6.2"		en		Affected