{"schema_version":"1.7.2","id":"OESA-2026-3456","modified":"2026-08-20T10:00:01Z","published":"2026-08-20T10:00:01Z","upstream":["CVE-2026-66484","CVE-2026-66485"],"summary":"cpio security update","details":"GNU cpio copies files into or out of a cpio or tar archive. The archive can be another file on the disk, a magnetic tape, or a pipe.\r\n\r\nSecurity Fix(es):\n\nGNU cpio contains a Path Traversal vulnerability in its tar archive extraction functionality. When extracting a tar archive in copy-in mode with the --no-absolute-filenames option, the extracted file name is normalized but the tar hard-link target is passed to the link_to_name function without equivalent sanitization before calling link function. A tar archive provided by an attacker, containing a hard-link entry whose linkname is set to an absolute path outside the extraction directory, can cause cpio to create a hard link to an existing file outside the intended extraction directory, breaking the expected guarantee of --no-absolute-filenames and allowing archive-controlled linkage to external files.\n\nThis issue has been fixed in commit e2b9cbdd3354d2b1569b7390d1bc15c1930559ad(CVE-2026-66484)\n\nGNU cpio is vulnerable to an uncontrolled memory allocation in the make_path function at src/makepath.c. The function uses alloca to allocate stack memory based on the length of argpath, which is derived from an archive-controlled pathname during extraction. A malicious cpio archive containing a sufficiently long nested pathname causes an unbounded stack allocation, resulting in a stack overflow and crash of the cpio process. An attacker who can supply a crafted cpio archive to a victim who extracts it can cause a denial of service.\n\nThis issue has been fixed in commit 3cd514031371d8aeeaf2048aa10103e02831aaa9(CVE-2026-66485)","affected":[{"package":{"ecosystem":"openEuler:20.03-LTS-SP4","name":"cpio","purl":"pkg:rpm/openEuler/cpio&distro=openEuler-20.03-LTS-SP4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.13-9.oe2003sp4"}]}],"ecosystem_specific":{"aarch64":["cpio-2.13-9.oe2003sp4.aarch64.rpm","cpio-debuginfo-2.13-9.oe2003sp4.aarch64.rpm","cpio-debugsource-2.13-9.oe2003sp4.aarch64.rpm"],"noarch":["cpio-help-2.13-9.oe2003sp4.noarch.rpm"],"src":["cpio-2.13-9.oe2003sp4.src.rpm"],"x86_64":["cpio-2.13-9.oe2003sp4.x86_64.rpm","cpio-debuginfo-2.13-9.oe2003sp4.x86_64.rpm","cpio-debugsource-2.13-9.oe2003sp4.x86_64.rpm"]}},{"package":{"ecosystem":"openEuler:22.03-LTS-SP4","name":"cpio","purl":"pkg:rpm/openEuler/cpio&distro=openEuler-22.03-LTS-SP4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.13-12.oe2203sp4"}]}],"ecosystem_specific":{"aarch64":["cpio-2.13-12.oe2203sp4.aarch64.rpm","cpio-debuginfo-2.13-12.oe2203sp4.aarch64.rpm","cpio-debugsource-2.13-12.oe2203sp4.aarch64.rpm"],"noarch":["cpio-help-2.13-12.oe2203sp4.noarch.rpm"],"src":["cpio-2.13-12.oe2203sp4.src.rpm"],"x86_64":["cpio-2.13-12.oe2203sp4.x86_64.rpm","cpio-debuginfo-2.13-12.oe2203sp4.x86_64.rpm","cpio-debugsource-2.13-12.oe2203sp4.x86_64.rpm"]}},{"package":{"ecosystem":"openEuler:24.03-LTS-SP1","name":"cpio","purl":"pkg:rpm/openEuler/cpio&distro=openEuler-24.03-LTS-SP1"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.14-5.oe2403sp1"}]}],"ecosystem_specific":{"aarch64":["cpio-2.14-5.oe2403sp1.aarch64.rpm","cpio-debuginfo-2.14-5.oe2403sp1.aarch64.rpm","cpio-debugsource-2.14-5.oe2403sp1.aarch64.rpm"],"noarch":["cpio-help-2.14-5.oe2403sp1.noarch.rpm"],"src":["cpio-2.14-5.oe2403sp1.src.rpm"],"x86_64":["cpio-2.14-5.oe2403sp1.x86_64.rpm","cpio-debuginfo-2.14-5.oe2403sp1.x86_64.rpm","cpio-debugsource-2.14-5.oe2403sp1.x86_64.rpm"]}},{"package":{"ecosystem":"openEuler:24.03-LTS-SP3","name":"cpio","purl":"pkg:rpm/openEuler/cpio&distro=openEuler-24.03-LTS-SP3"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.14-5.oe2403sp3"}]}],"ecosystem_specific":{"aarch64":["cpio-2.14-5.oe2403sp3.aarch64.rpm","cpio-debuginfo-2.14-5.oe2403sp3.aarch64.rpm","cpio-debugsource-2.14-5.oe2403sp3.aarch64.rpm"],"noarch":["cpio-help-2.14-5.oe2403sp3.noarch.rpm"],"src":["cpio-2.14-5.oe2403sp3.src.rpm"],"x86_64":["cpio-2.14-5.oe2403sp3.x86_64.rpm","cpio-debuginfo-2.14-5.oe2403sp3.x86_64.rpm","cpio-debugsource-2.14-5.oe2403sp3.x86_64.rpm"]}},{"package":{"ecosystem":"openEuler:24.03-LTS-SP4","name":"cpio","purl":"pkg:rpm/openEuler/cpio&distro=openEuler-24.03-LTS-SP4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.14-5.oe2403sp4"}]}],"ecosystem_specific":{"aarch64":["cpio-2.14-5.oe2403sp4.aarch64.rpm","cpio-debuginfo-2.14-5.oe2403sp4.aarch64.rpm","cpio-debugsource-2.14-5.oe2403sp4.aarch64.rpm"],"noarch":["cpio-help-2.14-5.oe2403sp4.noarch.rpm"],"src":["cpio-2.14-5.oe2403sp4.src.rpm"],"x86_64":["cpio-2.14-5.oe2403sp4.x86_64.rpm","cpio-debuginfo-2.14-5.oe2403sp4.x86_64.rpm","cpio-debugsource-2.14-5.oe2403sp4.x86_64.rpm"]}}],"references":[{"type":"ADVISORY","url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3456"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-66484"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-66485"}],"severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N"}],"database_specific":{"severity":"Medium"}}