01 Record

CVE-2025-39967

fbcon: fix integer overflow in fbcon_do_set_font

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

fbcon: fix integer overflow in fbcon_do_set_font

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

0.17% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 6.4% 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

2025-10-15 07:55Z1 YR AGO

Last updated

2026-08-05 12:06Z2 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:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-190Integer Overflow or WraparoundBase

Data version

5.2

Document digest

1efc00f7dcefc82149cdf120492b8bc38c9b7c3361182a6a51afe30cceec85b9

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux96e41fc29e8af5c5085fb8a79cab8d0d00bab86c to < 994bdc2d23c79087fbf7dcd9544454e8ebcef877, 39b3cffb8cf3111738ea993e2757ab382253d86a to < 9c8ec14075c5317edd6b242f1be8167aa1e4e333, 39b3cffb8cf3111738ea993e2757ab382253d86a to < b8a6e85328aeb9881531dbe89bcd2637a06c3c95, 39b3cffb8cf3111738ea993e2757ab382253d86a to < a6eb9f423b3db000aaedf83367b8539f6b72dcfc, 39b3cffb8cf3111738ea993e2757ab382253d86a to < adac90bb1aaf45ca66f9db8ac100be16750ace78, 39b3cffb8cf3111738ea993e2757ab382253d86a to < 4a4bac869560f943edbe3c2b032062f6673b13d3, 39b3cffb8cf3111738ea993e2757ab382253d86a to < c0c01f9aa08c8e10e10e8c9ebb5be01a4eff6eb7, 39b3cffb8cf3111738ea993e2757ab382253d86a to < 1a194e6c8e1ee745e914b0b7f50fa86c89ed13fe, ae021a904ac82d9fc81c25329d3c465c5a7d5686, 451bffa366f2cc0e5314807cb847f31c0226efed, 2c455e9c5865861f5ce09c5f596909495ed7657c, 72f099805dbc907fbe8fa19bccdc31d3e2ee6e9e, 34cf1aff169dc6dedad8d79da7bf1b4de2773dbc, 5.4.62 to < 5.4.300, 4.4.235 to < 4.5, 4.9.235 to < 4.10, 4.14.196 to < 4.15, 4.19.143 to < 4.20, 5.8.6 to < 5.9, 5.9—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/994bdc2d23c79087fbf7dcd9544454e8ebcef877
git.kernel.orghttps://git.kernel.org/stable/c/9c8ec14075c5317edd6b242f1be8167aa1e4e333
git.kernel.orghttps://git.kernel.org/stable/c/b8a6e85328aeb9881531dbe89bcd2637a06c3c95
git.kernel.orghttps://git.kernel.org/stable/c/a6eb9f423b3db000aaedf83367b8539f6b72dcfc
git.kernel.orghttps://git.kernel.org/stable/c/adac90bb1aaf45ca66f9db8ac100be16750ace78
git.kernel.orghttps://git.kernel.org/stable/c/4a4bac869560f943edbe3c2b032062f6673b13d3
git.kernel.orghttps://git.kernel.org/stable/c/c0c01f9aa08c8e10e10e8c9ebb5be01a4eff6eb7
git.kernel.orghttps://git.kernel.org/stable/c/1a194e6c8e1ee745e914b0b7f50fa86c89ed13fe

07 Fixed in

Debian 12

linux
Fixed in 6.1.158-1

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

Debian 13

linux
Fixed in 6.12.57-1

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

Debian 14

linux
Fixed in 6.16.10-1

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