Red Hat Security Advisory: jq security update
jq is a lightweight and flexible command-line JSON processor. jq is like sed for JSON data. You can use it to slice, filter, map, or transform structured data with the same ease that sed, awk, grep, or similar applications allow you to manipulate text. Security Fix(es): * jq: out-of-bounds read in jv_parse_sized() on error formatting for non-NUL-terminated buffers (CVE-2026-39979) * jq: jq: Denial of Service via crafted JSON object causing hash collisions (CVE-2026-40164) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
AI Analysis
Technical Summary
jq, a lightweight command-line JSON processor, contains two vulnerabilities: an out-of-bounds read in the jv_parse_sized() function when handling non-NUL-terminated buffers (CVE-2026-39979), and a denial of service vulnerability via crafted JSON objects causing hash collisions (CVE-2026-40164). These vulnerabilities affect Red Hat Enterprise Linux 10 and related products. Red Hat Product Security has issued an important security advisory (RHSA-2026:16692) with updated jq packages to remediate these issues. The advisory covers multiple architectures including x86_64, s390x, ppc64le, and aarch64. No CVSS scores are provided in the advisory. The vendor provides updated packages and instructions for applying the update.
Potential Impact
The out-of-bounds read vulnerability could lead to potential memory safety issues when jq processes malformed JSON buffers. The denial of service vulnerability allows an attacker to cause jq to consume excessive resources or crash by submitting crafted JSON objects that trigger hash collisions. Both issues could disrupt normal jq operations on affected systems. There are no known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released updated jq packages for Red Hat Enterprise Linux 10 and related products that address these vulnerabilities. Users should apply the security update as described in Red Hat advisory RHSA-2026:16692. Refer to https://access.redhat.com/articles/11258 for detailed instructions on applying the update. No additional mitigation steps are indicated by the vendor.
Red Hat Security Advisory: jq security update
Description
jq is a lightweight and flexible command-line JSON processor. jq is like sed for JSON data. You can use it to slice, filter, map, or transform structured data with the same ease that sed, awk, grep, or similar applications allow you to manipulate text. Security Fix(es): * jq: out-of-bounds read in jv_parse_sized() on error formatting for non-NUL-terminated buffers (CVE-2026-39979) * jq: jq: Denial of Service via crafted JSON object causing hash collisions (CVE-2026-40164) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
jq, a lightweight command-line JSON processor, contains two vulnerabilities: an out-of-bounds read in the jv_parse_sized() function when handling non-NUL-terminated buffers (CVE-2026-39979), and a denial of service vulnerability via crafted JSON objects causing hash collisions (CVE-2026-40164). These vulnerabilities affect Red Hat Enterprise Linux 10 and related products. Red Hat Product Security has issued an important security advisory (RHSA-2026:16692) with updated jq packages to remediate these issues. The advisory covers multiple architectures including x86_64, s390x, ppc64le, and aarch64. No CVSS scores are provided in the advisory. The vendor provides updated packages and instructions for applying the update.
Potential Impact
The out-of-bounds read vulnerability could lead to potential memory safety issues when jq processes malformed JSON buffers. The denial of service vulnerability allows an attacker to cause jq to consume excessive resources or crash by submitting crafted JSON objects that trigger hash collisions. Both issues could disrupt normal jq operations on affected systems. There are no known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released updated jq packages for Red Hat Enterprise Linux 10 and related products that address these vulnerabilities. Users should apply the security update as described in Red Hat advisory RHSA-2026:16692. Refer to https://access.redhat.com/articles/11258 for detailed instructions on applying the update. No additional mitigation steps are indicated by the vendor.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:16692
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-40164"]
- Cvss Version
- null
Threat ID: 6a1f4e85e29bf47b5007d9b2
Added to database: 06/02/2026, 21:43:33 UTC
Last enriched: 07/10/2026, 12:54:07 UTC
Last updated: 07/31/2026, 19:24:46 UTC
Views: 35
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.