01 Record

CVE-2025-21898

ftrace: Avoid potential division by zero in function_stat_show()

MediumPUBLISHEDCNA: Linux

CNA base score5.5 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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02 Description

ftrace: Avoid potential division by zero in function_stat_show()

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 ImpactpartialSuccessful exploitation gives limited 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

0.22% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 12.5% of scored records. A rank, not a probability.

NVD base score

5.5 (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:N/I:N/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Low. 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

2025-04-01 15:26Z1 YR AGO

Last updated

2026-05-23 15:57Z3 MO AGO

Reserved

2024-12-29

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Medium (CVSS 5.5)

CNA CVSS vector

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

Weaknesses

CWE-369Divide By ZeroBase

Data version

5.2

Document digest

9416764456261dcf3cde0b9ae589babd7d43f8bbd9d15cd7580925bb78152eac

05 Affected products

VendorProductVersionsPlatforms

LinuxLinuxf0629ee3922f10112584b1898491fecc74d98b3b to < 5b3d32f607f0478b414b16516cf27f9170cf66c8, e31f7939c1c27faa5d0e3f14519eaf7c89e8a69d to < ca381f60a3bb7cfaa618d73ca411610bd7fc3149, e31f7939c1c27faa5d0e3f14519eaf7c89e8a69d to < 3d738b53ed6cddb68e68c9874520a4bf846163b5, e31f7939c1c27faa5d0e3f14519eaf7c89e8a69d to < 992775227843c9376773784b8b362add44592ad7, e31f7939c1c27faa5d0e3f14519eaf7c89e8a69d to < f58a3f8e284d0bdf94164a8e61cd4e70d337a1a3, e31f7939c1c27faa5d0e3f14519eaf7c89e8a69d to < 746cc474a95473591853927b3a9792a2d671155b, e31f7939c1c27faa5d0e3f14519eaf7c89e8a69d to < 9cdac46fa7e854e587eb5f393fe491b6d7a9bdf6, e31f7939c1c27faa5d0e3f14519eaf7c89e8a69d to < a1a7eb89ca0b89dc1c326eeee2596f263291aca3, c59e74104cfd7df3ca0b5f59f1baee9c8c28b9ef, 015f0fd0fcc338513f80044add27fa46cf71d217, 1a2985af2a20b816a5cc41a2ddc1c4109ef6b9c6, 7650b4b1df091815bbbbb837d308dd4154684f8a, 010a7e846d4beaf34384c40ff18d5de10106d9b4, 5.4.9 to < 5.4.291, 3.16.83 to < 3.17, 4.4.209 to < 4.5, 4.9.209 to < 4.10, 4.14.163 to < 4.15, 4.19.94 to < 4.20, 5.5—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/5b3d32f607f0478b414b16516cf27f9170cf66c8
git.kernel.orghttps://git.kernel.org/stable/c/ca381f60a3bb7cfaa618d73ca411610bd7fc3149
git.kernel.orghttps://git.kernel.org/stable/c/3d738b53ed6cddb68e68c9874520a4bf846163b5
git.kernel.orghttps://git.kernel.org/stable/c/992775227843c9376773784b8b362add44592ad7
git.kernel.orghttps://git.kernel.org/stable/c/f58a3f8e284d0bdf94164a8e61cd4e70d337a1a3
git.kernel.orghttps://git.kernel.org/stable/c/746cc474a95473591853927b3a9792a2d671155b
git.kernel.orghttps://git.kernel.org/stable/c/9cdac46fa7e854e587eb5f393fe491b6d7a9bdf6
git.kernel.orghttps://git.kernel.org/stable/c/a1a7eb89ca0b89dc1c326eeee2596f263291aca3
lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/05/msg00030.html

01 Record index

CVE-2025-21898

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2025-21898

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References