CVE-2026-5315

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• 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

0.50% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 42.8% of scored records. A rank, not a probability.

NVD base score

2.1 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Analyzed. NVD last modified this record on 2026-10-26.

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.

Published

2026-04-01 23:15Z7 MO AGO

Last updated

2026-04-02 13:32Z7 MO AGO

Reserved

2026-04-01

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

Medium (CVSS 5.3)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

Weaknesses

• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferClass
• CWE-125Out-of-bounds ReadBase

Data version

5.2

Document digest

35d0806924bde627a7d4f18d92825296e96ded347d036671c60c5dee123a71f0

• vuldb.comVDB-354647 | Nothings stb TTF File stb_truetype.h stbtt__buf_get8 out-of-boundshttps://vuldb.com/vuln/354647vdb-entrytechnical-description
• vuldb.comVDB-354647 | CTI Indicators (IOB, IOC, IOA)https://vuldb.com/vuln/354647/ctisignaturepermissions-required
• vuldb.comSubmit #780559 | nothings stb (stb_truetype.h) ≤ 1.26 Out-of-Bounds Readhttps://vuldb.com/submit/780559third-party-advisory
• gist.github.comhttps://gist.github.com/d0razi/c11dd07c75f3b795e4f8bbfd6e2f0d29exploit