CVE-2026-72357
Description
A flaw was found in the Linux kernel's uprobes/x86 component. The __in_uprobe_trampoline function incorrectly uses the current process's memory management (current->mm) for Virtual Memory Area (VMA) lookups during the unregistration process. This occurs because the lookup is performed in the tracer's context rather than the traced process's context. This improper memory management could lead to unexpected system behavior or stability issues.
Statement
A MODERATE severity flaw was found in the Linux kernel uprobes subsystem on x86 systems. In the uprobe unregistration path, the __in_uprobe_trampoline() function used current->mm for the VMA lookup even though it runs in the tracer's context rather than in the context of the traced process. This incorrect memory management can lead to unexpected kernel behavior, up to a kernel panic, and therefore affects system availability. Exploiting this flaw requires local access with sufficient privileges to register and unregister uprobes on a traced process. Red Hat rated this flaw MODERATE because the impact is limited to availability (CVSS 5.5, AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H), while the CVE.org record assigns a higher score (7.8) by assuming high confidentiality and integrity impacts that the technical evidence does not support. The vulnerable code is not present in the Red Hat Enterprise Linux and Red Hat In-Vehicle OS kernel versions covered by this flaw, so all listed Red Hat product streams are marked not affected.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 5.5 | N/A | 7.8 |
| Attack Vector | Local | N/A | Local |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | Low | N/A | Low |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | None | N/A | High |
| Integrity Impact | None | N/A | High |
| Availability Impact | High | N/A | High |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
cve.org: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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