{"schema_version":"1.7.2","id":"OESA-2026-2840","modified":"2026-07-06T06:27:45Z","published":"2026-07-06T06:27:45Z","upstream":["CVE-2026-55392"],"summary":"nilfs-utils security update","details":"Userspace utilities for creating and mounting NILFS v2 filesystems.\r\n\r\nSecurity Fix(es):\n\nNILFS utilities through 2.3.0, fixed in commit 26efb5d, nilfs_sb_is_valid() function fails to validate s_log_block_size field in NILFS2 superblock before bit-shift operations. Attackers supplying crafted NILFS2 images trigger undefined behavior through oversized shifts or out-of-memory conditions, crashing tools like nilfs-tune and dumpseg.(CVE-2026-55392)","affected":[{"package":{"ecosystem":"openEuler:20.03-LTS-SP4","name":"nilfs-utils","purl":"pkg:rpm/openEuler/nilfs-utils&distro=openEuler-20.03-LTS-SP4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.7-7.oe2003sp4"}]}],"ecosystem_specific":{"aarch64":["nilfs-utils-2.2.7-7.oe2003sp4.aarch64.rpm","nilfs-utils-debuginfo-2.2.7-7.oe2003sp4.aarch64.rpm","nilfs-utils-debugsource-2.2.7-7.oe2003sp4.aarch64.rpm","nilfs-utils-devel-2.2.7-7.oe2003sp4.aarch64.rpm"],"noarch":["nilfs-utils-help-2.2.7-7.oe2003sp4.noarch.rpm"],"src":["nilfs-utils-2.2.7-7.oe2003sp4.src.rpm"],"x86_64":["nilfs-utils-2.2.7-7.oe2003sp4.x86_64.rpm","nilfs-utils-debuginfo-2.2.7-7.oe2003sp4.x86_64.rpm","nilfs-utils-debugsource-2.2.7-7.oe2003sp4.x86_64.rpm","nilfs-utils-devel-2.2.7-7.oe2003sp4.x86_64.rpm"]}}],"references":[{"type":"ADVISORY","url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2840"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55392"}],"database_specific":{"severity":"Medium"}}