VulnerabilityPublished 27 Dec 2024Updated 3 Nov 2025

CVE-2024-53172: Linux kernel · ubi: fastmap: Fix duplicate slab cache names while attaching

Source GCVE Database

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Not known to be exploited · CVSS 5.5 Medium.

Data as of 30 Oct 2026, 00:45 UTC

CVSS 3.1 base score

5.5Medium

How severe the flaw is on the 0–10 CVSS scale.

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

Attack Vector: Local
Attack Complexity: Low
Privileges Required: Low
User Interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: None
Availability: High

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Local: The vulnerable component is not bound to the network stack and the attacker’s path is via read/write/execute capabilities. Either: the attacker exploits the vulnerability by accessing the target system locally (e.g., keyboard, console), or remotely (e.g., SSH); or the attacker relies on User Interaction by another person to perform actions required to exploit the vulnerability (e.g., tricking a legitimate user into opening a malicious document).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: Low: The attacker is authorized with (i.e., requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: None: There is no loss of confidentiality within the impacted component.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: High: There is total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 27 Dec 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-jrx3-xfh8-49wm

What to do

AI-suggested

A fix is available that addresses the issue by using different slab cache names for alloc_ai() callers. Users should update their Linux kernel to a version that includes this fix. Since no specific fixed versions are provided, check the vendor or Linux kernel mainline repositories for the patch corresponding to commit 4c39529663b9 or later.

Description

CVE-2024-53172 addresses a vulnerability in the Linux kernel's UBI fastmap feature where duplicate slab cache names are created during the fast attaching process. This triggers kernel warnings and can lead to a denial of service condition. The issue occurs because the alloc_ai() function is called twice with the same slab cache name 'ubi_aeb_slab_cache' when CONFIG_DEBUG_VM=y is enabled. The vulnerability has been fixed by assigning different slab cache names to the alloc_ai() callers.

Impact

The vulnerability does not affect confidentiality or integrity but can cause a denial of service by triggering kernel warnings and potential instability during the UBI fastmap attach process. This may lead to system crashes or degraded system reliability on affected Linux kernel versions.

Summary

This vulnerability in the Linux kernel's UBI fastmap implementation involves the creation of duplicate slab cache names during the fast attaching process. Since commit 4c39529663b9, duplicate slab cache names cause kernel warnings. The alloc_ai() function is invoked twice with the same slab cache name 'ubi_aeb_slab_cache', triggering warnings and potentially destabilizing the kernel. The problem is reproducible when loading the UBI device with CONFIG_DEBUG_VM=y. The fix involves using distinct slab cache names for each alloc_ai() caller to prevent duplication.

References

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