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Fencer Vulns
medium 4.1

CVE-2025-45582 json

GNU Tar through 1.35 allows file overwrite via directory traversal in crafted TAR archives, with a...

published 2025-07-11 15 mo ago modified 2026-07-23 3 mo ago also EUVD-2025-21178 , JLSEC-2025-197

cvss
4.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 42%
public exploits
0
none known

Summary

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 which "tar xf" is run more than once (e.g., when installing a package can automatically install two dependencies that are set up as untrusted tarballs instead of official packages). NOTE: the official GNU Tar manual has an otherwise-empty directory for each "tar xf" in its Security Rules of Thumb; however, third-party advice leads users to run "tar xf" more than once into the same directory.

Patch / fix

  • julia Tar_jll 1.35.0+0
  • gnu tar 1.35
  • tar Ubuntu 22.04 LTS 1.34+dfsg-1ubuntu0.1.22.04.4
  • tar Ubuntu 24.04 LTS 1.35+dfsg-3ubuntu0.2
  • tar Ubuntu 26.04 LTS 1.35+dfsg-4ubuntu0.2

ubuntu advisories UBUNTU-CVE-2025-45582

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • tar RHEL 8 2:1.30-13.el8_10
  • tar RHEL 9 2:1.34-9.el9_7
  • tar RHEL 10.1 2:1.35-9.el10_1
  • tar RHEL 9.6 EUS 2:1.34-7.el9_6.2
  • tar RHEL 9.4 EUS 2:1.34-6.el9_4.3
  • tar enterprise linux eus 10.0 2:1.35-7.el10_0.2

red hat advisories RHSA-2026:70390RHSA-2026:0435RHSA-2026:0434RHSA-2026:0135RHSA-2026:0067RHSA-2026:0002

  • tar SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 1.35-160000.4.1
  • tar SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 1.35-160000.3.1
  • tar SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +13 more 1.34-150000.3.37.1
  • tar Linux Micro 6.0 1.35-3.1
  • tar Linux Micro 6.1 1.35-slfo.1.1_3.1
  • tar SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 1.34-15.27.1

suse advisories SUSE-SU-2026:22289-1SUSE-SU-2026:22377-1SUSE-SU-2026:2615-1SUSE-SU-2026:21002-1SUSE-SU-2026:21143-1SUSE-SU-2026:1177-1

  • tar openSUSE Leap 16.0 1.35-160000.4.1
  • tar openSUSE Tumbleweed 1.35-7.1
  • tar openSUSE Leap 16.0 1.35-160000.3.1

opensuse advisories openSUSE-SU-2026:21070-1openSUSE-SU-2026:10743-1openSUSE-SU-2026:20472-1

  • tar AlmaLinux 8 2:1.30-13.el8_10
  • tar AlmaLinux 10 2:1.35-9.el10_1
  • tar AlmaLinux 9 2:1.34-9.el9_7

almalinux advisories ALSA-2026:70390ALSA-2026:0002ALSA-2026:0067

  • tar Rocky Linux 8 2:1.30-13.el8_10
  • tar Rocky Linux 9 2:1.34-9.el9_7
  • tar Rocky Linux 10 2:1.35-9.el10_1

rocky linux advisories RLSA-2026:70390RLSA-2026:0067RLSA-2026:0002

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-45582 updated cvss 5.6

tar: Tar path traversal

  • Red Hat Enterprise Linux 6 tar
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 tar Red Hat Fuse 7 io.syndesis-syndesis-ui Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Ceph Storage 7 rhceph 1769508455
    fixed: vendor fix RHSA-2026:1858
  • Red Hat Ceph Storage 8 rhceph 1769512383
    fixed: vendor fix RHSA-2026:1652
  • Red Hat Discovery 2 discovery 1767888970, discovery 1767904573
    fixed: vendor fix RHSA-2026:0414
  • Red Hat Enterprise Linux BaseOS (v. 8) tar 1.30-13.el8_10
    fixed: vendor fix RHSA-2026:70390
  • Red Hat Enterprise Linux BaseOS (v. 9) tar 1.34-9.el9_7
    fixed: vendor fix RHSA-2026:0067
  • Red Hat Enterprise Linux BaseOS (v. 10) tar 1.35-9.el10_1
    fixed: vendor fix RHSA-2026:0002
show 5 more
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) tar 1.35-7.el10_0.2
    fixed: vendor fix RHSA-2026:0135
  • Red Hat Enterprise Linux BaseOS EUS (v.9.4) tar 1.34-6.el9_4.3
    fixed: vendor fix RHSA-2026:0434
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) tar 1.34-7.el9_6.2
    fixed: vendor fix RHSA-2026:0435
  • Red Hat Update Infrastructure 5 rhui5 1768221100, rhui5 1768221107, rhui5 1768296285, rhui5 1768377012
    fixed: vendor fix RHSA-2026:0685
  • Red Hat Ceph Storage 7 rhceph 1769511650, rhceph 1769512818, rhceph 1769513068, rhceph 1769514555, rhceph 1769523636 Red Hat Ceph Storage 8 rhceph 1768902743, rhceph 1768903190, rhceph 1768903749, rhceph 1768907469, rhceph 1768915405 Red Hat Enterprise Linux BaseOS EUS (v. 10.0) tar 1.35-7.el10_0.2 Red Hat Enterprise Linux BaseOS EUS (v.9.6) tar 1.34-7.el9_6.2
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
15 mo ago

Exploit prediction

0.49% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/i900008/vulndb/blob/main/Gnu_tar_vuln.md referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 4.1 CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:N/I:L/A:L
OSV 3.1 4.1 CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:N/I:L/A:L

Affected packages

ecosystem package affected fixed in
julia Tar_jll
<1.35.0+0
1.35.0+0

Affected products

  • GNU Tar

Classification

Weakness
  • CWE-24 Path Traversal: '../filedir'

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.