jq is a command-line JSON processor. In commits before 2f09060afab23fe9390cce7cb860b10416e1bf5f, the jv_parse_sized() API in libjq accepts a counted buffer with an explicit length parameter, but its error-handling path formats the input buffer using %s in jv_string_fmt(), which reads until a NUL terminator is found rather than respecting the caller-supplied length. This means that when malformed JSON is passed in a non-NUL-terminated buffer, the error construction logic performs an out-of-bounds read past the end of the buffer. The vulnerability is reachable by any libjq consumer calling jv_parse_sized() with untrusted input, and depending on memory layout, can result in memory disclosure or process termination. The issue has been patched in commit 2f09060afab23fe9390cce7cb860b10416e1bf5f.
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2026:16252 https://access.redhat.com/errata/RHSA-2026:16252
This issue has been addressed in the following products: Red Hat Enterprise Linux 9 Via RHSA-2026:16693 https://access.redhat.com/errata/RHSA-2026:16693
This issue has been addressed in the following products: Red Hat Enterprise Linux 10 Via RHSA-2026:16692 https://access.redhat.com/errata/RHSA-2026:16692
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions Via RHSA-2026:18045 https://access.redhat.com/errata/RHSA-2026:18045
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Via RHSA-2026:18044 https://access.redhat.com/errata/RHSA-2026:18044
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.6 Extended Update Support Via RHSA-2026:18042 https://access.redhat.com/errata/RHSA-2026:18042
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Red Hat Enterprise Linux 8.8 Telecommunications Update Service Via RHSA-2026:18046 https://access.redhat.com/errata/RHSA-2026:18046
This issue has been addressed in the following products: Red Hat Enterprise Linux 10.0 Extended Update Support Via RHSA-2026:18040 https://access.redhat.com/errata/RHSA-2026:18040
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Via RHSA-2026:18048 https://access.redhat.com/errata/RHSA-2026:18048
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions Red Hat Enterprise Linux 8.6 Telecommunications Update Service Via RHSA-2026:18047 https://access.redhat.com/errata/RHSA-2026:18047
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.4 Extended Update Support Via RHSA-2026:18043 https://access.redhat.com/errata/RHSA-2026:18043
This issue has been addressed in the following products: Red Hat Enterprise Linux 10 Via RHSA-2026:19151 https://access.redhat.com/errata/RHSA-2026:19151
This issue has been addressed in the following products: Red Hat Enterprise Linux 9 Via RHSA-2026:19365 https://access.redhat.com/errata/RHSA-2026:19365