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The function readUvarint used to read the xz container format may not terminate a loop provide malicous input.\n\n### Patches\n\nThe problem has been fixed in release v0.5.8.\n\n### Workarounds\n\nLimit the size of the compressed file input to a reasonable size for your use case.\n\n### References\n\nThe standard library had recently the same issue and got the [CVE-2020-16845](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-16845) allocated.\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [xz](https://github.com/ulikunitz/xz/issues).","references":[{"reference_url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-29482.json","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}],"url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-29482.json"},{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2021-29482","reference_id":"","reference_type":"","scores":[{"value":"0.00433","scoring_system":"epss","scoring_elements":"0.63008","published_at":"2026-05-29T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2021-29482"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29482","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29482"},{"reference_url":"https://github.com/ulikunitz/xz/commit/69c6093c7b2397b923acf82cb378f55ab2652b9b","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/ulikunitz/xz/commit/69c6093c7b2397b923acf82cb378f55ab2652b9b"},{"reference_url":"https://github.com/ulikunitz/xz/issues/35","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/ulikunitz/xz/issues/35"},{"reference_url":"https://github.com/ulikunitz/xz/security/advisories/GHSA-25xm-hr59-7c27","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/ulikunitz/xz/security/advisories/GHSA-25xm-hr59-7c27"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2021-29482","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-29482"},{"reference_url":"https://pkg.go.dev/vuln/GO-2020-0016","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://pkg.go.dev/vuln/GO-2020-0016"},{"reference_url":"https://bugzilla.redhat.com/show_bug.cgi?id=1954368","reference_id":"1954368","reference_type":"","scores":[],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1954368"},{"reference_url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=988243","reference_id":"988243","reference_type":"","scores":[],"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=988243"},{"reference_url":"https://access.redhat.com/errata/RHSA-2021:2920","reference_id":"RHSA-2021:2920","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2021:2920"},{"reference_url":"https://access.redhat.com/errata/RHSA-2022:0687","reference_id":"RHSA-2022:0687","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2022:0687"},{"reference_url":"https://access.redhat.com/errata/RHSA-2022:1276","reference_id":"RHSA-2022:1276","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2022:1276"},{"reference_url":"https://access.redhat.com/errata/RHSA-2022:2183","reference_id":"RHSA-2022:2183","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2022:2183"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/346005?format=json","purl":"pkg:deb/debian/golang-github-ulikunitz-xz@0.5.6-2?distro=trixie","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-ew49-g15s-jbae"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/golang-github-ulikunitz-xz@0.5.6-2%3Fdistro=trixie"},{"url":"http://public2.vulnerablecode.io/api/packages/346006?format=json","purl":"pkg:deb/debian/golang-github-ulikunitz-xz@0.5.15-1?distro=trixie","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/golang-github-ulikunitz-xz@0.5.15-1%3Fdistro=trixie"}],"aliases":["CVE-2021-29482","GHSA-25xm-hr59-7c27"],"risk_score":null,"exploitability":null,"weighted_severity":null,"resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-mk85-xm7y-judu"}],"risk_score":null,"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/golang-github-ulikunitz-xz@0.5.6-2%3Fdistro=trixie"}