Red Hat Security Advisory: libtasn1 security update
A low severity vulnerability (CVE-2025-13151) in the libtasn1 library used by Red Hat Enterprise Linux 9 allows denial of service via a stack-based buffer overflow in the asn1_expend_octet_string function. This library handles ASN.1 parsing and DER encoding/decoding. Red Hat has released an update to address this issue in multiple Red Hat Enterprise Linux 9 variants.
AI Analysis
Technical Summary
The libtasn1 library, which provides ASN.1 parsing and DER encoding/decoding functions, contains a stack-based buffer overflow vulnerability in the asn1_expend_octet_string function (CVE-2025-13151). This flaw can be exploited to cause a denial of service. Red Hat Product Security has rated this issue as low severity and issued a security advisory (RHSA-2026:28253) with updated packages for Red Hat Enterprise Linux 9 to fix the vulnerability.
Potential Impact
Successful exploitation of this vulnerability results in denial of service due to a stack-based buffer overflow in libtasn1. There is no indication of code execution or other impacts. No known exploits are reported in the wild.
Mitigation Recommendations
Red Hat has released updated libtasn1 packages for Red Hat Enterprise Linux 9 and its variants that fix this vulnerability. Users should apply the security update as described in Red Hat advisory RHSA-2026:28253 and the referenced update article (https://access.redhat.com/articles/11258). This update mitigates the vulnerability. No additional mitigation steps are indicated.
Red Hat Security Advisory: libtasn1 security update
Description
A low severity vulnerability (CVE-2025-13151) in the libtasn1 library used by Red Hat Enterprise Linux 9 allows denial of service via a stack-based buffer overflow in the asn1_expend_octet_string function. This library handles ASN.1 parsing and DER encoding/decoding. Red Hat has released an update to address this issue in multiple Red Hat Enterprise Linux 9 variants.
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The libtasn1 library, which provides ASN.1 parsing and DER encoding/decoding functions, contains a stack-based buffer overflow vulnerability in the asn1_expend_octet_string function (CVE-2025-13151). This flaw can be exploited to cause a denial of service. Red Hat Product Security has rated this issue as low severity and issued a security advisory (RHSA-2026:28253) with updated packages for Red Hat Enterprise Linux 9 to fix the vulnerability.
Potential Impact
Successful exploitation of this vulnerability results in denial of service due to a stack-based buffer overflow in libtasn1. There is no indication of code execution or other impacts. No known exploits are reported in the wild.
Mitigation Recommendations
Red Hat has released updated libtasn1 packages for Red Hat Enterprise Linux 9 and its variants that fix this vulnerability. Users should apply the security update as described in Red Hat advisory RHSA-2026:28253 and the referenced update article (https://access.redhat.com/articles/11258). This update mitigates the vulnerability. No additional mitigation steps are indicated.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:28253
- Cve Count
- 1
- Additional Cves
- []
- Cvss Version
- null
Threat ID: 6a3b283deed863c81ee4eb67
Added to database: 06/24/2026, 00:43:41 UTC
Last enriched: 06/24/2026, 00:54:05 UTC
Last updated: 06/24/2026, 01:25:33 UTC
Views: 4
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