CVE-2026-87875: Out-of-bounds Read in Red Hat Red Hat Enterprise Linux 10
CVE-2026-87875 is a medium severity vulnerability in Red Hat Enterprise Linux 10 involving an out-of-bounds read in the cupsUTF32ToUTF8() function of CUPS. The flaw arises because the function lacks a source-length bound, allowing it to read beyond the end of the source buffer. This vulnerability can be triggered via SNMP supply-description parsing with attacker-controlled input. The CVSS score is 4.3, indicating limited confidentiality impact without integrity or availability effects. No official patch or remediation guidance is currently confirmed from the vendor advisory.
AI Analysis
Technical Summary
The vulnerability CVE-2026-87875 affects the cupsUTF32ToUTF8() function in the CUPS printing system on Red Hat Enterprise Linux 10. The function does not enforce a source-length bound, which can lead to a heap out-of-bounds read when processing UTF-32 to UTF-8 conversions. This issue is reachable through SNMP supply-description parsing in backend/snmp-supplies.c, where attacker-controlled data can trigger the flaw. The vulnerability has a CVSS 3.1 base score of 4.3, reflecting a low-complexity attack vector over a local network (AV:A), no privileges required, and no user interaction needed. The impact is limited to a confidentiality loss with no integrity or availability impact. There is no vendor advisory content indicating a patch or mitigation at this time.
Potential Impact
An attacker who can supply malicious SNMP supply-description data may cause the cupsUTF32ToUTF8() function to read beyond the intended buffer boundaries, potentially exposing sensitive memory contents. The impact is limited to confidentiality loss; there is no indication of integrity or availability compromise. There are no known exploits in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2026-87875 for current remediation guidance. Until an official fix is available, consider restricting access to SNMP services or limiting exposure of the affected CUPS components to untrusted networks to reduce risk.
CVE-2026-87875: Out-of-bounds Read in Red Hat Red Hat Enterprise Linux 10
Description
CVE-2026-87875 is a medium severity vulnerability in Red Hat Enterprise Linux 10 involving an out-of-bounds read in the cupsUTF32ToUTF8() function of CUPS. The flaw arises because the function lacks a source-length bound, allowing it to read beyond the end of the source buffer. This vulnerability can be triggered via SNMP supply-description parsing with attacker-controlled input. The CVSS score is 4.3, indicating limited confidentiality impact without integrity or availability effects. No official patch or remediation guidance is currently confirmed from the vendor advisory.
CVSS v3.1
Score 4.3medium
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-87875 affects the cupsUTF32ToUTF8() function in the CUPS printing system on Red Hat Enterprise Linux 10. The function does not enforce a source-length bound, which can lead to a heap out-of-bounds read when processing UTF-32 to UTF-8 conversions. This issue is reachable through SNMP supply-description parsing in backend/snmp-supplies.c, where attacker-controlled data can trigger the flaw. The vulnerability has a CVSS 3.1 base score of 4.3, reflecting a low-complexity attack vector over a local network (AV:A), no privileges required, and no user interaction needed. The impact is limited to a confidentiality loss with no integrity or availability impact. There is no vendor advisory content indicating a patch or mitigation at this time.
Potential Impact
An attacker who can supply malicious SNMP supply-description data may cause the cupsUTF32ToUTF8() function to read beyond the intended buffer boundaries, potentially exposing sensitive memory contents. The impact is limited to confidentiality loss; there is no indication of integrity or availability compromise. There are no known exploits in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2026-87875 for current remediation guidance. Until an official fix is available, consider restricting access to SNMP services or limiting exposure of the affected CUPS components to untrusted networks to reduce risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-09-09T13:58:00.395Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-87875","vendor":"Red Hat"}]
Threat ID: 6aa187eeacd9273b4992561b
Added to database: 09/09/2026, 16:23:10 UTC
Last enriched: 09/09/2026, 16:38:14 UTC
Last updated: 09/09/2026, 17:01:26 UTC
Views: 5
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.