01 Record

CVE-2026-46107

dm-thin: fix metadata refcount underflow

HighPUBLISHEDCNA: Linux

CNA base score7.8 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

View raw JSON

02 Description

dm-thin: fix metadata refcount underflow

03 Exploitation and scoring

Exploitation: Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision: Not assessed by CISA
EPSS probability: 0.13% probability of exploitation activity in the next 30 days.
EPSS percentile: Ranks above 3.0% of scored records. A rank, not a probability.
NVD base score: 7.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD analysis status: Analyzed. NVD last modified this record on 2026-06-25.
Red Hat severity: Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2026-05-28 09:35Z3 MO AGO

Last updated

2026-08-05 12:29Z1 MO AGO

Reserved

2026-05-13

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 7.8)

CNA CVSS vector

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

Weaknesses

CWE-191Integer Underflow (Wrap or Wraparound)Base
CWE-911Improper Update of Reference CountBase

Data version

5.2

Document digest

6d1c9363b6db4151b9c539d203a41d970bf9df24bffc50ffd35582d6736705f7

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux3241b1d3e0aaafbfcd320f4d71ade629728cc4f4 to < b719d12cb94df345e9ad2715fd0abe9afcaeb111, 3241b1d3e0aaafbfcd320f4d71ade629728cc4f4 to < f49b41c9eb7c6ff00df27cd49cea210abbadd8ad, 3241b1d3e0aaafbfcd320f4d71ade629728cc4f4 to < f06f6aededd792a754cd677c02b3d3016d868c2c, 3241b1d3e0aaafbfcd320f4d71ade629728cc4f4 to < 12161e03d33afce781f68fa11cc6060538862fad, 3241b1d3e0aaafbfcd320f4d71ade629728cc4f4 to < 323d252a4a378834e4fe68298ca61cfc5dd3a460, 3241b1d3e0aaafbfcd320f4d71ade629728cc4f4 to < 85311a585a26640760cd0f3349ab9f2905691044, 3241b1d3e0aaafbfcd320f4d71ade629728cc4f4 to < 5ec0debbcfd43596e32c1239e993de06a704e04c, 3241b1d3e0aaafbfcd320f4d71ade629728cc4f4 to < 09a65adc7d8bbfce06392cb6d375468e2728ead5, 3.2—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/b719d12cb94df345e9ad2715fd0abe9afcaeb111
git.kernel.orghttps://git.kernel.org/stable/c/f49b41c9eb7c6ff00df27cd49cea210abbadd8ad
git.kernel.orghttps://git.kernel.org/stable/c/f06f6aededd792a754cd677c02b3d3016d868c2c
git.kernel.orghttps://git.kernel.org/stable/c/12161e03d33afce781f68fa11cc6060538862fad
git.kernel.orghttps://git.kernel.org/stable/c/323d252a4a378834e4fe68298ca61cfc5dd3a460
git.kernel.orghttps://git.kernel.org/stable/c/85311a585a26640760cd0f3349ab9f2905691044
git.kernel.orghttps://git.kernel.org/stable/c/5ec0debbcfd43596e32c1239e993de06a704e04c
git.kernel.orghttps://git.kernel.org/stable/c/09a65adc7d8bbfce06392cb6d375468e2728ead5

01 Record index

CVE-2026-46107

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2026-46107

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References