Medium [CVE-2026-19542] Fix out-of-bounds array write in tdelete
This medium-severity Red Hat Linux advisory covers CVE-2026-19542 affecting Red Hat Enterprise Linux 9, Red Hat package: glibc.
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Summary
A flaw was found in glibc. An out-of-bounds array write vulnerability exists within the `tdelete` function.
This issue occurs due to incorrect management of array sizes, which can lead to memory corruption. A local attacker with low privileges could potentially exploit this to cause a denial of service or disclose sensitive information.
This Moderate impact vulnerability in glibc's `tdelete` function requires a local attacker with low privileges and user interaction to trigger an out-of-bounds write. While it could lead to denial of service or information disclosure, the high attack complexity limits its broader impact on Red Hat systems.
Red Hat severity: Moderate — CVSS 4.2 (CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L). Weakness: CWE-787.
Affected Red Hat products: Red Hat Enterprise Linux 9. Under investigation: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Hardened Images; Red Hat OpenShift Container Platform 4.
Red Hat does not currently list a fixing RHSA for this CVE.
Affected products named by the advisory: Red Hat package: glibc.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 53 minutes ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 53 minutes ago·verify at source
Mitigation checklist
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Official advisory · high-confidence parse· fetched 53 minutes ago·verify at source
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