RHSA-2026:70390: tar security update

RHSA-2026:70390, released September 23, 2026, fixes 4 CVEs in tar (version 2:1.30-13.el8_10). None of them is reported as exploited. Patch Radar priority: Routine.

Routine

CVEs closed

None rated Critical

Exploited

None reported

Highest CVSS

5.6

Base score, 0 to 10

Highest EPSS

0.0049

42nd percentile

Priority of the 4 CVEs

Patch now 0
                                Urgent 0
                                High 0
                                Routine 4

Fixed package versions

Product	Release	Fixed in
tar	RHEL 8	2:1.30-13.el8_10

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
Routine	CVE-2025-45582	GNU Tar through 1.35 allows file overwrite via directory traversal in crafted TAR archives, with a certain two-step process. First, the victim must extract an archive that contains a ../ symlink to a critical directory. Second, the victim must extract an archive that contains a critical file, specified via a relative pathname that begins with the symlink name and ends with that critical file's name. Here, the extraction follows the symlink and overwrites the critical file. This bypasses the protection mechanism of "Member name contains '..'" that would occur for a single TAR archive that attempted to specify the critical file via a ../ approach. For example, the first archive can contain "x -> ../../../../../home/victim/.ssh" and the second archive can contain x/authorized_keys. This can affect server applications that automatically extract any number of user-supplied TAR archives, and were relying on the blocking of traversal. This can also affect software installation processes in wh	5.6	0.0049	None reported
Routine	CVE-2026-5704	tar: A flaw was found in tar	5.6	0.0047	None reported
Routine	CVE-2026-18508	Tar: tar: --one-top-level hardlink targets not confined to top-level directory enabling arbitrary file overwrite	5.6	0.0014	None reported
Routine	CVE-2026-18477	Tar: tar: toctou in incremental dumpdir 'x' rename handling allows restore path escape	5.6	0.0010	None reported

Also fixes CVE-2025-45582

RLSA-2026:70390
tar on rocky 8
ELSA-2026-70390
tar on ol 8
ALSA-2026:70390
tar on almalinux 8
OPENSUSE-SU-2026:21070-1
tar on opensuse-leap 16.0
SUSE-SU-2026:22377-1
tar on sles 16.0
SUSE-SU-2026:1177-1
tar on opensuse-leap 15.6, sles 15.6, sles 15.7
RHSA-2026:0067
tar on RHEL 9
RLSA-2026:0067
tar on rocky 9

Vendor advisory

https://access.redhat.com/errata/RHSA-2026:70390

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