01 Record

CVE-2026-31648

mm: filemap: fix nr_pages calculation overflow in filemap_map_pages()

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

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02 Description

mm: filemap: fix nr_pages calculation overflow in filemap_map_pages()

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

0.12% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 1.8% 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 2026-10-19.

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

2026-04-24 14:45Z6 MO AGO

Last updated

2026-10-19 18:56Z10 DAYS AGO

Reserved

2026-03-09

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-190Integer Overflow or WraparoundBase

Data version

5.2

Document digest

d47c5f652e046840b8ca4122e6f8b7f4e1f4f7bdfad290c5d8e6c1c66205c74f

05 Affected products

VendorProductVersionsPlatforms

LinuxLinuxfe601b70eac6cd266e8d7d55030e90a73ed0e339 to < 88591194df736a508dd5461ab2167a61e98caac1, 743a2753a02e805347969f6f89f38b736850d808 to < 633ab680c405ac390e6bec5b74aaf46197c837b6, 743a2753a02e805347969f6f89f38b736850d808 to < 576543bedd616254032d4ebe54a90076f9e31740, 743a2753a02e805347969f6f89f38b736850d808 to < 9316a820b9aae07d44469d6485376dad824c5b3f, 743a2753a02e805347969f6f89f38b736850d808 to < f58df566524ebcdfa394329c64f47e3c9257516e, 84ede15f27c06b111d1398dfa80b6fac4b135e34, 6.6.117 to < 6.6.135, 6.1.159 to < 6.2, 6.12—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/88591194df736a508dd5461ab2167a61e98caac1
git.kernel.orghttps://git.kernel.org/stable/c/633ab680c405ac390e6bec5b74aaf46197c837b6
git.kernel.orghttps://git.kernel.org/stable/c/576543bedd616254032d4ebe54a90076f9e31740
git.kernel.orghttps://git.kernel.org/stable/c/9316a820b9aae07d44469d6485376dad824c5b3f
git.kernel.orghttps://git.kernel.org/stable/c/f58df566524ebcdfa394329c64f47e3c9257516e

07 Fixed in

Debian 12

linux
No fix yet

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

linux
Fixed in 6.12.85-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

linux
Fixed in 6.19.13-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.