Integer overflow in Libtiff
CVE-2026-4775
A flaw was found in the libtiff library. A remote attacker could exploit a signed integer overflow vulnerability in the putcontig8bitYCbCr44tile function by providing a specially crafted TIFF file. This flaw can lead to an out-of-bounds heap write due to incorrect memory pointer calculations, potentially causing a denial of service (application crash) or arbitrary code execution.
Vulnerability class: Integer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.006 (45.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 45.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Libtiff
- Debian Linux — versions 11.0
- Red Hat Ai Inference Server 3.2 — versions 1780681984
- Red Hat Ai Inference Server 3.3 — versions 1782352950, 1782352847, 1782352919
- Red Hat Enterprise Linux 10 — versions 0:4.6.0-6.el10_1.3, 0:4.6.0-8.el10_2.1
- Red Hat Enterprise Linux 10.0 Extended Update Support — versions 0:4.6.0-6.el10_0.3
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 7 Extended Lifecycle Support — versions 0:3.9.4-12.el7_9.2, 0:4.0.3-35.el7_9.2
- Red Hat Enterprise Linux 8 — versions 0:3.9.4-15.el8_10, 0:4.0.9-4.el8_10, 0:4.0.9-37.el8_10
Weakness classification (CWE)
References
- access.redhat.com/errata/RHSA-2026:12265 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:12271 (vendor-advisory)
- access.redhat.com/security/cve/CVE-2026-4775 (Third Party Advisory, vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking, Third Party Advisory, Issue Tracking)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)
- access.redhat.com/errata/RHSA-2026:14929 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:16055 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:19150 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:19363 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:19585 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-4775?
- CVE-2026-4775 is a high-severity vulnerability in Libtiff, classified under Integer Overflow or Wraparound. CVSS score: 7.8/10. Published 2026-03-24.
- How severe is CVE-2026-4775?
- High severity. CVSS v3 base score is 7.8 out of 10.