01 Record

CVE-2025-40190

ext4: guard against EA inode refcount underflow in xattr update

HighPUBLISHEDCNA: Linux

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

View raw JSON

02 Description

ext4: guard against EA inode refcount underflow in xattr update

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: 0.17% probability of exploitation activity in the next 30 days.
EPSS percentile: Ranks above 6.1% 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:N/UI:R/S:U/C:H/I:H/A:H
NVD analysis status: Deferred. NVD last modified this record on 2026-07-30.
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

2025-11-12 21:56Z9 MO AGO

Last updated

2026-08-05 12:08Z1 MO AGO

Reserved

2025-04-16

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 7.8)

CNA CVSS vector

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

Weaknesses

CWE-191Integer Underflow (Wrap or Wraparound)Base

Data version

5.2

Document digest

7788f374f4838ddd052b6d684da23ef5f7457b34e084c3aa33dc754560de986a

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < ea39e712c2f5ae148ee5515798ae03523673e002, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 1cfb3e4ddbdc8e02e637b8852540bd4718bf4814, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 505e69f76ac497e788f4ea0267826ec7266b40c8, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 3d6269028246f4484bfed403c947a114bb583631, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 79ea7f3e11effe1bd9e753172981d9029133a278, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 6b879c4c6bbaab03c0ad2a983953bd1410bb165e, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 440b003f449a4ff2a00b08c8eab9ba5cd28f3943, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 57295e835408d8d425bef58da5253465db3d6888, 0 to < 5.4.301, 0 to < 5.10.246, 0 to < 5.15.195, 0 to < 6.1.157, 0 to < 6.6.113, 0 to < 6.12.54, 0 to < 6.17.4—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/ea39e712c2f5ae148ee5515798ae03523673e002
git.kernel.orghttps://git.kernel.org/stable/c/1cfb3e4ddbdc8e02e637b8852540bd4718bf4814
git.kernel.orghttps://git.kernel.org/stable/c/505e69f76ac497e788f4ea0267826ec7266b40c8
git.kernel.orghttps://git.kernel.org/stable/c/3d6269028246f4484bfed403c947a114bb583631
git.kernel.orghttps://git.kernel.org/stable/c/79ea7f3e11effe1bd9e753172981d9029133a278
git.kernel.orghttps://git.kernel.org/stable/c/6b879c4c6bbaab03c0ad2a983953bd1410bb165e
git.kernel.orghttps://git.kernel.org/stable/c/440b003f449a4ff2a00b08c8eab9ba5cd28f3943
git.kernel.orghttps://git.kernel.org/stable/c/57295e835408d8d425bef58da5253465db3d6888

01 Record index

CVE-2025-40190

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2025-40190

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References