01 Record

CVE-2025-21887

ovl: fix UAF in ovl_dentry_update_reval by moving dput() in ovl_link_up

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

ovl: fix UAF in ovl_dentry_update_reval by moving dput() in ovl_link_up

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.21% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 11.7% 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

Modified. NVD last modified this record on 2026-07-14.

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

2025-03-27 14:57Z1 YR AGO

Last updated

2026-08-05 11:55Z1 MO AGO

Reserved

2024-12-29

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-416Use After FreeVariant

Data version

5.2

Document digest

ef54fd162e3054f7b566bcc4df4bd6db113b91e1132abaf52deacf5dd1929c2a

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux714ba10a6dd19752a349e59aa875f3288ccb59b9 to < f77618291836168eca99e89cd175256f928f5e64, 62f29ca45f832e281fc14966ac25f6ff3bd121ca to < 4b49d939b5a79117f939b77cc67efae2694d9799, e4f2a1feebb3f209a0fca82aa53507a5b8be4d53 to < a7c41830ffcd17b2177a95a9b99b270302090c35, b07d5cc93e1b28df47a72c519d09d0a836043613 to < 64455c8051c3aedc71abb7ec8d47c80301f99f00, b07d5cc93e1b28df47a72c519d09d0a836043613 to < 3594aad97e7be2557ca9fa9c931b206b604028c8, b07d5cc93e1b28df47a72c519d09d0a836043613 to < 60b4b5c1277fc491da9e1e7abab307bfa39c2db7, b07d5cc93e1b28df47a72c519d09d0a836043613 to < c84e125fff2615b4d9c259e762596134eddd2f27, 33ab4dd6202f359558a0a2678b94d1b9994c17e5, 1ecdc55e5cd9f70f8d7513802971d4cffb9f77af, 5.10.188 to < 5.10.247, 5.15.121 to < 5.15.179, 6.1.39 to < 6.1.130, 6.3.13 to < 6.4, 6.4.4 to < 6.5, 6.5—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/f77618291836168eca99e89cd175256f928f5e64
git.kernel.orghttps://git.kernel.org/stable/c/4b49d939b5a79117f939b77cc67efae2694d9799
git.kernel.orghttps://git.kernel.org/stable/c/a7c41830ffcd17b2177a95a9b99b270302090c35
git.kernel.orghttps://git.kernel.org/stable/c/64455c8051c3aedc71abb7ec8d47c80301f99f00
git.kernel.orghttps://git.kernel.org/stable/c/3594aad97e7be2557ca9fa9c931b206b604028c8
git.kernel.orghttps://git.kernel.org/stable/c/60b4b5c1277fc491da9e1e7abab307bfa39c2db7
git.kernel.orghttps://git.kernel.org/stable/c/c84e125fff2615b4d9c259e762596134eddd2f27
lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-019113.html

01 Record index

CVE-2025-21887

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2025-21887

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References