CVE-2026-4775: Integer Overflow or Wraparound in Red Hat Red Hat Enterprise Linux 10
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.
AI Analysis
Technical Summary
The vulnerability CVE-2026-4775 affects the libtiff library in Red Hat Enterprise Linux 9 and 10. It is caused by a signed integer overflow in the putcontig8bitYCbCr44tile function during TIFF file processing, which leads to incorrect memory pointer calculations and an out-of-bounds heap write. This can result in denial of service or arbitrary code execution if exploited by a remote attacker supplying a malicious TIFF file. Red Hat has issued security advisories RHSA-2026:12265 and RHSA-2026:12271 that provide updated libtiff packages to fix this issue across various supported architectures including x86_64, s390x, ppc64le, and aarch64. The CVSS v3.1 base score is 7.8 (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H), reflecting a high severity vulnerability with local attack vector requiring user interaction but no privileges. No exploits are currently known in the wild.
Potential Impact
Successful exploitation of this vulnerability can lead to arbitrary code execution or denial of service on affected systems running Red Hat Enterprise Linux 9 or 10 with vulnerable libtiff versions. The impact affects confidentiality, integrity, and availability of the system. The vulnerability requires a local attack vector with user interaction but no privileges, making it moderately difficult to exploit. There are no known active exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released official security updates that fix this vulnerability in libtiff for Red Hat Enterprise Linux 9 and 10. Users should apply the updated packages as described in Red Hat advisories RHSA-2026:12265 and RHSA-2026:12271. Detailed instructions for applying these updates are available at https://access.redhat.com/articles/11258. Since official patches are available, applying these updates is the recommended and effective mitigation. No additional action is required beyond patching.
CVE-2026-4775: Integer Overflow or Wraparound in Red Hat Red Hat Enterprise Linux 10
Description
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-4775 affects the libtiff library in Red Hat Enterprise Linux 9 and 10. It is caused by a signed integer overflow in the putcontig8bitYCbCr44tile function during TIFF file processing, which leads to incorrect memory pointer calculations and an out-of-bounds heap write. This can result in denial of service or arbitrary code execution if exploited by a remote attacker supplying a malicious TIFF file. Red Hat has issued security advisories RHSA-2026:12265 and RHSA-2026:12271 that provide updated libtiff packages to fix this issue across various supported architectures including x86_64, s390x, ppc64le, and aarch64. The CVSS v3.1 base score is 7.8 (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H), reflecting a high severity vulnerability with local attack vector requiring user interaction but no privileges. No exploits are currently known in the wild.
Potential Impact
Successful exploitation of this vulnerability can lead to arbitrary code execution or denial of service on affected systems running Red Hat Enterprise Linux 9 or 10 with vulnerable libtiff versions. The impact affects confidentiality, integrity, and availability of the system. The vulnerability requires a local attack vector with user interaction but no privileges, making it moderately difficult to exploit. There are no known active exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released official security updates that fix this vulnerability in libtiff for Red Hat Enterprise Linux 9 and 10. Users should apply the updated packages as described in Red Hat advisories RHSA-2026:12265 and RHSA-2026:12271. Detailed instructions for applying these updates are available at https://access.redhat.com/articles/11258. Since official patches are available, applying these updates is the recommended and effective mitigation. No additional action is required beyond patching.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-03-24T14:26:05.988Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/errata/RHSA-2026:12265","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:12271","vendor":"Red Hat"},{"url":"https://access.redhat.com/security/cve/CVE-2026-4775","vendor":"Red Hat"}]
Threat ID: 69c2b1b4f4197a8e3b48d204
Added to database: 3/24/2026, 3:45:56 PM
Last enriched: 5/1/2026, 2:04:52 AM
Last updated: 5/8/2026, 10:32:04 PM
Views: 50
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