CVE-2025-21849 Vulnerability Analysis & Exploit Details

CVE-2025-21849
Vulnerability Scoring

5.5
/10
Significant Risk

Security assessments indicate that CVE-2025-21849 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-2025-21849 Details

Status: Analyzed

Last updated: 🕓 13 Mar 2025, 16:29 UTC
Originally published on: 🕙 12 Mar 2025, 10:15 UTC

Time between publication and last update: 1 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-2025-21849 Vulnerability Summary

CVE-2025-21849: In the Linux kernel, the following vulnerability has been resolved: drm/i915/gt: Use spin_lock_irqsave() in interruptible context spin_lock/unlock() functions used in interrupt contexts could result in a deadlock, as seen in GitLab issue #13399, which occurs when interrupt comes in while holding a lock. Try to remedy the problem by saving irq state before spin lock acquisition. v2: add irqs' state save/restore calls to all locks/unlocks in signal_irq_work() execution (Maciej) v3: use with spin_lock_irqsave() in guc_lrc_desc_unpin() instead of other lock/unlock calls and add Fixes and Cc tags (Tvrtko); change title and commit message (cherry picked from commit c088387ddd6482b40f21ccf23db1125e8fa4af7e)

Assessing the Risk of CVE-2025-21849

Access Complexity Graph

The exploitability of CVE-2025-21849 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-2025-21849

CVE-2025-21849 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-2025-21849, 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-2025-21849, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: None
    CVE-2025-21849 has no significant impact on data confidentiality.
  • Integrity: None
    CVE-2025-21849 poses no threat to data integrity.
  • Availability: High
    CVE-2025-21849 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: 0.042% (probability of exploit)

EPSS Percentile: 5.07% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 94.93% of others.

CVE-2025-21849 References

External References

CWE Common Weakness Enumeration

CWE-667

CAPEC Common Attack Pattern Enumeration and Classification

  • Forced Deadlock CAPEC-25 The adversary triggers and exploits a deadlock condition in the target software to cause a denial of service. A deadlock can occur when two or more competing actions are waiting for each other to finish, and thus neither ever does. Deadlock conditions can be difficult to detect.
  • Leveraging Race Conditions CAPEC-26 The adversary targets a race condition occurring when multiple processes access and manipulate the same resource concurrently, and the outcome of the execution depends on the particular order in which the access takes place. The adversary can leverage a race condition by "running the race", modifying the resource and modifying the normal execution flow. For instance, a race condition can occur while accessing a file: the adversary can trick the system by replacing the original file with their version and cause the system to read the malicious file.
  • Leveraging Race Conditions via Symbolic Links CAPEC-27 This attack leverages the use of symbolic links (Symlinks) in order to write to sensitive files. An attacker can create a Symlink link to a target file not otherwise accessible to them. When the privileged program tries to create a temporary file with the same name as the Symlink link, it will actually write to the target file pointed to by the attackers' Symlink link. If the attacker can insert malicious content in the temporary file they will be writing to the sensitive file by using the Symlink. The race occurs because the system checks if the temporary file exists, then creates the file. The attacker would typically create the Symlink during the interval between the check and the creation of the temporary file.

Vulnerable Configurations

  • cpe:2.3:o:linux:linux_kernel:6.9:-:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.9:-:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.9.1:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.9.1:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.9.2:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.9.2:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.9.3:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.9.3:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.9.4:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.9.4:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.9.5:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.9.5:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.9.6:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.9.6:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.9.7:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.9.7:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.9.8:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.9.8:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.9.9:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.9.9:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.9.10:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.9.10:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.9.11:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.9.11:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.9.12:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.9.12:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.9:rc1:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.9:rc1:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.9:rc2:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.9:rc2:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.9:rc3:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.9:rc3:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.9:rc4:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.9:rc4:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.9:rc5:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.9:rc5:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.9:rc6:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.9:rc6:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.9:rc7:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.9:rc7:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.10:-:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.10:-:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.10.0:rc1:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.10.0:rc1:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.10.0:rc2:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.10.0:rc2:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.10.0:rc3:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.10.0:rc3:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.10.1:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.10.1:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.10.2:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.10.2:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.10.3:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.10.3:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.10.4:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.10.4:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.10.5:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.10.5:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.10.6:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.10.6:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.10.7:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.10.7:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.10.8:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.10.8:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.10.9:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.10.9:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.10.10:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.10.10:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.10.11:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.10.11:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.10.12:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.10.12:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.10.13:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.10.13:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.10.14:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.10.14:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.10:rc1:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.10:rc1:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.10:rc2:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.10:rc2:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.10:rc3:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.10:rc3:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.10:rc4:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.10:rc4:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.10:rc5:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.10:rc5:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.10:rc6:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.10:rc6:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.10:rc7:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.10:rc7:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.11:-:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.11:-:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.11.1:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.11.1:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.11.2:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.11.2:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.11.3:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.11.3:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.11.4:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.11.4:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.11.5:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.11.5:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.11.6:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.11.6:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.11.7:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.11.7:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.11.8:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.11.8:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.11.9:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.11.9:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.11.10:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.11.10:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.11.11:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.11.11:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.11:rc2:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.11:rc2:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.11:rc3:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.11:rc3:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.11:rc4:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.11:rc4:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.11:rc5:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.11:rc5:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.11:rc6:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.11:rc6:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.11:rc7:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.11:rc7:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.11:rc8:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.11:rc8:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.12:-:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.12:-:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.12.1:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.12.1:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.12.2:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.12.2:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.12.3:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.12.3:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.12.4:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.12.4:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.12.5:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.12.5:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.12.6:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.12.6:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.12.7:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.12.7:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.12.8:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.12.8:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.12.9:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.12.9:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.12.10:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.12.10:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.12.11:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.12.11:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.12.12:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.12.12:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.12.13:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.12.13:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.12.14:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.12.14:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.12.16:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.12.16:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.13:-:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.13:-:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.13.1:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.13.1:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.13.2:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.13.2:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.13.3:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.13.3:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.13.4:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.13.4:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.14:rc3:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.14:rc3:*:*:*:*:*:*

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