CVE-2026-18508

CVE-2026-18508 : GNU tar is vulnerable when using --one-top-level; hardlink targets are not confined to the designated top-level directory and may resolve against the extraction working directory. A crafted archive can create hardlinks that escape the intended boundary and, with a preexisting sym...

CVE-2026-18477

CVE-2026-18477 describes a TOCTOU flaw in GNU tar related to incremental dumpdir rename handling. A local attacker with write access to a directory being backed up can influence the restore process on the target system, causing files/directories to be created, renamed, or overwritten outside the ...