Description
Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. Prior to version 3.17.2, disabling symbol_keys on a reused Oj::Parser instance triggers a heap use-after-free. When symbol_keys is toggled from true to false, opt_symbol_keys_set frees the internal key cache (cache_free) but does not clear the pointer. The next parse call reads from the freed cache via cache_intern, producing a use-after-free. This issue has been fixed in version 3.17.2.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| ohler55 | oj | < 3.17.2 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | ruby-oj | 3.17.3-1 | — |
| Debian 13 | ruby-oj | 3.16.3-1+deb13u1 | — |
| Debian 12 | ruby-oj | 3.14.2-1+deb12u1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | ruby-oj | No fix yet | — |
| Ubuntu 26.04 LTS | ruby-oj | No fix yet | — |
| Ubuntu 25.10 | ruby-oj | No fix yet | — |
| Ubuntu 24.04 LTS | ruby-oj | No fix yet | — |
| Ubuntu 22.04 LTS | ruby-oj | No fix yet | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | ruby-oj | No fix yet | — |
| Ubuntu 18.04 LTS | ruby-oj | No fix yet | — |
| Ubuntu 16.04 LTS | ruby-oj | No fix yet | — |
| Ubuntu 14.04 LTS | ruby-oj | No fix yet | — |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | ruby3.2-fluentd-kubernetes-daemonset-1.19-kinesis | 1.19.2.1.1-r5 | — |
| Wolfi rolling | ruby3.2-kube-logging-operator-fluentd-outputs +1 | 6.7.0-r4 | — |
| Wolfi rolling | ruby3.3-fluentd-kubernetes-daemonset-1.19-kinesis +2 | 1.19.3.1.0-r0 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| RubyGems | oj | < 3.17.2 | 3.17.2 | GHSA-2cw7-v8ff-p88r |