HOMEVULNERABILITIESCVE-2026-31603
MEDIUM

CVE-2026-31603

Published: April 24, 2026· Updated: Apr 29, 2026

5.5
CVSS v3.1
EPSS:0.02%probability of exploitation in 30 daysPercentile:4.8th

Official Description

In the Linux kernel, the following vulnerability has been resolved:

staging: sm750fb: fix division by zero in ps_to_hz()

ps_to_hz() is called from hw_sm750_crtc_set_mode() without validating

that pixclock is non-zero. A zero pixclock passed via FBIOPUT_VSCREENINFO

causes a division by zero.

Fix by rejecting zero pixclock in lynxfb_ops_check_var(), consistent

with other framebuffer drivers.

NVD Source

Technical Analysis

CVE-2026-31603 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

Linux1 product
linux kernel
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://git.kernel.org/stable/c/1412ba36597a82e928f20047f41d6c6582dafe8a
PATCHhttps://git.kernel.org/stable/c/2f640c6043aeab31a2f607d7605271860c3b11df
PATCHhttps://git.kernel.org/stable/c/6144895a4335a2491c282931f1f2fa610b86339f
PATCHhttps://git.kernel.org/stable/c/75a1621e4f91310673c9acbcbb25c2a7ff821cd3
PATCHhttps://git.kernel.org/stable/c/779412e0e391fd4a0d12e1d1adaa7bf043de62d7
PATCHhttps://git.kernel.org/stable/c/daf6733bd7c4c5015b431739ac29b0e29021096b

All References (6)

→
https://git.kernel.org/stable/c/1412ba36597a82e928f20047f41d6c6582dafe8aPatch
→
https://git.kernel.org/stable/c/2f640c6043aeab31a2f607d7605271860c3b11dfPatch
→
https://git.kernel.org/stable/c/6144895a4335a2491c282931f1f2fa610b86339fPatch
→
https://git.kernel.org/stable/c/75a1621e4f91310673c9acbcbb25c2a7ff821cd3Patch
→
https://git.kernel.org/stable/c/779412e0e391fd4a0d12e1d1adaa7bf043de62d7Patch
→
https://git.kernel.org/stable/c/daf6733bd7c4c5015b431739ac29b0e29021096bPatch

Quick Facts

CVE IDCVE-2026-31603
CVSS Score5.5 / 10
SeverityMEDIUM
CISA KEVNo
EPSS (30d)0.02%
Affected1 vendor
PublishedApr 24, 2026

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-31603 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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