Linux Kernel up to 6.18.13/6.19.3 llbitmap_suspend_timeout state issue

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Linux Kernel up to 6.18.13/6.19.3. This affects the function llbitmap_suspend_timeout. The manipulation results in state issue. This vulnerability is reported as CVE-2026-45955. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 6.18.13/6.19.3. Affected is the function llbitmap_suspend_timeout. The manipulation with an unknown input leads to a state issue vulnerability. CWE is classifying the issue as CWE-371. This is going to have an impact on availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: md/md-llbitmap: fix percpu_ref not resurrected on suspend timeout When llbitmap_suspend_timeout() times out waiting for percpu_ref to become zero, it returns -ETIMEDOUT without resurrecting the percpu_ref. The caller (md_llbitmap_daemon_fn) then continues to the next page without calling llbitmap_resume(), leaving the percpu_ref in a killed state permanently. Fix this by resurrecting the percpu_ref before returning the error, ensuring the page control structure remains usable for subsequent operations.

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2026-45955 since 05/13/2026. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 06/07/2026).

Upgrading to version 6.18.14 or 6.19.4 eliminates this vulnerability. Applying the patch 095417d6b669c2dec39a5842ccb94df915f97f54/2446d099350185caeed19ab2c0270451a97296fb/d119bd2e1643cc023210ff3c6f0657e4f914e71d is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.7
VulDB Temp Score: 5.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.1
CNA Vector (Linux): 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: State issue
CWE: CWE-371
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.18.14/6.19.4
Patch: 095417d6b669c2dec39a5842ccb94df915f97f54/2446d099350185caeed19ab2c0270451a97296fb/d119bd2e1643cc023210ff3c6f0657e4f914e71d

Timelineinfo

05/13/2026 CVE reserved
05/27/2026 +14 days Advisory disclosed
05/27/2026 +0 days VulDB entry created
06/07/2026 +10 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-45955 (🔒)
GCVE (CVE): GCVE-0-2026-45955
GCVE (VulDB): GCVE-100-366192

Entryinfo

Created: 05/27/2026 17:09
Updated: 06/07/2026 01:15
Changes: 05/27/2026 17:09 (58), 06/07/2026 01:15 (11)
Complete: 🔍
Cache ID: 216::103

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