CVE-2026-98903 Vulnerability Analysis & Exploit Details

CVE-2026-98903
Vulnerability Scoring

Analysis In Progress
Analysis In Progress

Attack Complexity Details

  • Attack Complexity:
    Attack Complexity Analysis In Progress
  • Attack Vector:
    Attack Vector Under Analysis
  • Privileges Required: None
    No authentication is required for exploitation.
  • Scope:
    Impact is confined to the initially vulnerable component.
  • User Interaction: None
    No user interaction is necessary for exploitation.

CVE-2026-98903 Details

Status: Received on 23 Oct 2026, 12:18 UTC

Last updated: 🕖 26 Oct 2026, 07:17 UTC
Originally published on: 🕛 23 Oct 2026, 12:18 UTC

Time between publication and last update: 2 days

CVSS Release:

CVE-2026-98903 Vulnerability Summary

CVE-2026-98903: In the Linux kernel, the following vulnerability has been resolved: mailbox: imx: Add a channel shutdown field sashiko complained about possible teardown problem. The scenario CPU 0 CPU 1 imx_mu_isr() imx_mu_shutdown() imx_mu_xcr_rmw(priv, IMX_MU_RCR, 0, IMX_MU_xCR_RIEn(priv->dcfg->type, cp->idx)); imx_mu_specific_rx() imx_mu_xcr_rmw(priv, IMX_MU_RCR, IMX_MU_xCR_RIEn(priv->dcfg->type, 0), 0); free_irq() The RX event remains enabled because in this short window the RX event was disabled in ->shutdown() while the interrupt was active and then enabled again by the ISR while ->shutdown waited in free_irq(). This race requires timing and if happens can be problematic on shared handlers if the "removed" channel triggers an interrupt. In this case the irq-core will shutdown the interrupt with the "nobody cared" message. Introduce imx_mu_con_priv::shutdown to signal that the channel is shutting down. This flag is set with the lock held (by imx_mu_xcr_clr_shut()). The unmask side uses imx_mu_xcr_set_act() which only enables the event if the channel has not been shutdown and serialises on the same lock.

Assessing the Risk of CVE-2026-98903

Access Complexity Graph

The exploitability of CVE-2026-98903 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-2026-98903

No exploitability data is available for CVE-2026-98903.

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-2026-98903, 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-2026-98903, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: None
    CVE-2026-98903 does not compromise confidentiality.
  • Integrity: None
    CVE-2026-98903 does not impact data integrity.
  • Availability: None
    CVE-2026-98903 does not affect system availability.

CVE-2026-98903 References

External References

CWE Common Weakness Enumeration

Unknown

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