CVE-2022-49400 Vulnerability Analysis & Exploit Details

CVE-2022-49400
Vulnerability Scoring

5.5
/10
Significant Risk

Security assessments indicate that CVE-2022-49400 presents a notable risk, potentially requiring prompt mitigation.

Attack Complexity Details

  • Attack Complexity: Low
    Exploits can be performed without significant complexity or special conditions.
  • Attack Vector: Local
    Vulnerability requires local system access.
  • Privileges Required: Low
    Some privileges are necessary to exploit the vulnerability.
  • Scope: Unchanged
    Exploit remains within the originally vulnerable component.
  • User Interaction: None
    No user interaction is necessary for exploitation.

CVE-2022-49400 Details

Status: Analyzed

Last updated: 🕣 17 Apr 2025, 20:49 UTC
Originally published on: 🕖 26 Feb 2025, 07:01 UTC

Time between publication and last update: 50 days

CVSS Release: version 3

CVSS3 Source

nvd@nist.gov

CVSS3 Type

Primary

CVSS3 Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVE-2022-49400 Vulnerability Summary

CVE-2022-49400: In the Linux kernel, the following vulnerability has been resolved: md: Don't set mddev private to NULL in raid0 pers->free In normal stop process, it does like this: do_md_stop | __md_stop (pers->free(); mddev->private=NULL) | md_free (free mddev) __md_stop sets mddev->private to NULL after pers->free. The raid device will be stopped and mddev memory is free. But in reshape, it doesn't free the mddev and mddev will still be used in new raid. In reshape, it first sets mddev->private to new_pers and then runs old_pers->free(). Now raid0 sets mddev->private to NULL in raid0_free. The new raid can't work anymore. It will panic when dereference mddev->private because of NULL pointer dereference. It can panic like this: [63010.814972] kernel BUG at drivers/md/raid10.c:928! [63010.819778] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI [63010.825011] CPU: 3 PID: 44437 Comm: md0_resync Kdump: loaded Not tainted 5.14.0-86.el9.x86_64 #1 [63010.833789] Hardware name: Dell Inc. PowerEdge R6415/07YXFK, BIOS 1.15.0 09/11/2020 [63010.841440] RIP: 0010:raise_barrier+0x161/0x170 [raid10] [63010.865508] RSP: 0018:ffffc312408bbc10 EFLAGS: 00010246 [63010.870734] RAX: 0000000000000000 RBX: ffffa00bf7d39800 RCX: 0000000000000000 [63010.877866] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffa00bf7d39800 [63010.884999] RBP: 0000000000000000 R08: fffffa4945e74400 R09: 0000000000000000 [63010.892132] R10: ffffa00eed02f798 R11: 0000000000000000 R12: ffffa00bbc435200 [63010.899266] R13: ffffa00bf7d39800 R14: 0000000000000400 R15: 0000000000000003 [63010.906399] FS: 0000000000000000(0000) GS:ffffa00eed000000(0000) knlGS:0000000000000000 [63010.914485] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [63010.920229] CR2: 00007f5cfbe99828 CR3: 0000000105efe000 CR4: 00000000003506e0 [63010.927363] Call Trace: [63010.929822] ? bio_reset+0xe/0x40 [63010.933144] ? raid10_alloc_init_r10buf+0x60/0xa0 [raid10] [63010.938629] raid10_sync_request+0x756/0x1610 [raid10] [63010.943770] md_do_sync.cold+0x3e4/0x94c [63010.947698] md_thread+0xab/0x160 [63010.951024] ? md_write_inc+0x50/0x50 [63010.954688] kthread+0x149/0x170 [63010.957923] ? set_kthread_struct+0x40/0x40 [63010.962107] ret_from_fork+0x22/0x30 Removing the code that sets mddev->private to NULL in raid0 can fix problem.

Assessing the Risk of CVE-2022-49400

Access Complexity Graph

The exploitability of CVE-2022-49400 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).

Exploitability Analysis for CVE-2022-49400

CVE-2022-49400 presents an accessible attack vector with minimal effort required. Restricting access controls and implementing security updates are critical to reducing exploitation risks.

Understanding AC and PR

A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.

Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.

Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.

CVSS Score Breakdown Chart

Above is the CVSS Sub-score Breakdown for CVE-2022-49400, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.

CIA Impact Analysis

Below is the Impact Analysis for CVE-2022-49400, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: None
    CVE-2022-49400 has no significant impact on data confidentiality.
  • Integrity: None
    CVE-2022-49400 poses no threat to data integrity.
  • Availability: High
    CVE-2022-49400 can disrupt system operations, potentially causing complete denial of service (DoS).

Exploit Prediction Scoring System (EPSS)

The EPSS score estimates the probability that this vulnerability will be exploited in the near future.

EPSS Score: 0.045% (probability of exploit)

EPSS Percentile: 18.4% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 81.6% of others.

CVE-2022-49400 References

External References

CWE Common Weakness Enumeration

CWE-476

Vulnerable Configurations

  • cpe:2.3:o:linux:linux_kernel:5.15.17:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.15.17:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.15.18:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.15.18:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.15.19:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.15.19:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.15.20:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.15.20:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.15.21:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.15.21:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.15.22:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.15.22:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.15.23:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.15.23:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.15.24:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.15.24:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.15.25:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.15.25:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.15.26:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.15.26:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.15.27:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.15.27:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.15.28:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.15.28:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.15.29:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.15.29:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.15.30:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.15.30:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.15.31:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.15.31:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.15.32:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.15.32:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.15.33:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.15.33:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.15.34:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.15.34:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.15.35:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.15.35:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.15.36:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.15.36:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.15.37:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.15.37:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.15.38:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.15.38:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.15.39:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.15.39:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.15.40:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.15.40:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.15.41:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.15.41:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.15.42:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.15.42:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.15.43:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.15.43:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.15.44:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.15.44:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.15.45:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.15.45:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16.3:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.16.3:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16.4:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.16.4:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16.5:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.16.5:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16.6:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.16.6:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16.7:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.16.7:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16.8:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.16.8:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16.9:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.16.9:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16.10:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.16.10:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16.11:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.16.11:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16.12:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.16.12:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16.13:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.16.13:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16.14:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.16.14:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16.15:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.16.15:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16.16:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.16.16:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16.17:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.16.17:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16.18:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.16.18:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16.19:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.16.19:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16.20:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.16.20:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16.62:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.16.62:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16:rc2:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.16:rc2:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16:rc3:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.16:rc3:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16:rc4:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.16:rc4:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16:rc5:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.16:rc5:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16:rc6:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.16:rc6:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16:rc7:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.16:rc7:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16:rc8:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.16:rc8:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.17:-:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.17:-:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.17.1:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.17.1:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.17.2:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.17.2:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.17.3:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.17.3:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.17.4:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.17.4:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.17.5:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.17.5:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.17.6:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.17.6:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.17.7:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.17.7:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.17.8:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.17.8:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.17.9:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.17.9:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.17.10:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.17.10:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.17.11:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.17.11:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.17.12:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.17.12:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.17.13:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.17.13:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.18:-:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.18:-:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.18.1:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.18.1:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.18.2:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:5.18.2:*:*:*:*:*:*:*

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