--- id: CVE-2025-8194 title: >- There is a defect in the CPython “tarfile” module affecting the “TarFile” extraction and entry enumeration APIs summary: >- There is a defect in the CPython “tarfile” module affecting the “TarFile” extraction and entry enumeration APIs. The tar implementation would process tar archives with negative offsets without error, resulting in an infinite loop and dea… severity: high cvss: 7.5 cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H' cwe: - CWE-835 published: '2025-07-28' updated: '2026-07-30' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-8194' references: - url: 'https://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1' label: cna@python.org - url: >- https://github.com/python/cpython/commit/57f5981d6260ed21266e0c26951b8564cc252bc2 label: cna@python.org - url: >- https://github.com/python/cpython/commit/7040aa54f14676938970e10c5f74ea93cd56aa38 label: cna@python.org - url: >- https://github.com/python/cpython/commit/73f03e4808206f71eb6b92c579505a220942ef19 label: cna@python.org - url: >- https://github.com/python/cpython/commit/b4ec17488eedec36d3c05fec127df71c0071f6cb label: cna@python.org - url: >- https://github.com/python/cpython/commit/c9d9f78feb1467e73fd29356c040bde1c104f29f label: cna@python.org - url: >- https://github.com/python/cpython/commit/cdae923ffe187d6ef916c0f665a31249619193fe label: cna@python.org - url: >- https://github.com/python/cpython/commit/fbc2a0ca9ac8aff6887f8ddf79b87b4510277227 label: cna@python.org - url: 'https://github.com/python/cpython/issues/130577' label: cna@python.org - url: 'https://github.com/python/cpython/pull/137027' label: cna@python.org - url: >- https://mail.python.org/archives/list/security-announce@python.org/thread/ZULLF3IZ726XP5EY7XJ7YIN3K5MDYR2D/ label: cna@python.org - url: 'http://www.openwall.com/lists/oss-security/2025/07/28/1' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'http://www.openwall.com/lists/oss-security/2025/07/28/2' label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-8194.json - url: 'https://access.redhat.com/security/cve/CVE-2025-8194' - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2384043' - url: 'https://www.cve.org/CVERecord?id=CVE-2025-8194' - url: 'https://nvd.nist.gov/vuln/detail/CVE-2025-8194' - url: 'https://access.redhat.com/errata/RHSA-2025:16117' - url: 'https://access.redhat.com/errata/RHSA-2025:14984' - url: 'https://access.redhat.com/errata/RHSA-2025:14900' - url: 'https://access.redhat.com/errata/RHSA-2025:14560' - url: 'https://access.redhat.com/errata/RHSA-2025:14841' - url: 'https://access.redhat.com/errata/RHSA-2025:14546' - url: 'https://access.redhat.com/errata/RHSA-2025:16262' - url: 'https://access.redhat.com/errata/RHSA-2025:16078' - url: 'https://access.redhat.com/errata/RHSA-2025:16151' - url: 'https://access.redhat.com/errata/RHSA-2025:16118' - url: 'https://access.redhat.com/errata/RHSA-2025:15968' - url: 'https://access.redhat.com/errata/RHSA-2025:16062' - url: 'https://access.redhat.com/errata/RHSA-2025:16153' - url: 'https://access.redhat.com/errata/RHSA-2025:16031' - url: 'https://access.redhat.com/errata/RHSA-2025:15724' - url: 'https://access.redhat.com/errata/RHSA-2025:16152' - url: 'https://access.redhat.com/errata/RHSA-2025:16012' - url: 'https://access.redhat.com/errata/RHSA-2025:15800' - url: 'https://access.redhat.com/errata/RHSA-2025:16016' - url: 'https://access.redhat.com/errata/RHSA-2025:15348' - url: 'https://access.redhat.com/errata/RHSA-2025:15019' - url: 'https://access.redhat.com/errata/RHSA-2025:15010' tags: - nvd - csaf - vex - red-hat epss: 0.00641 epssPercentile: 0.48551 ingestedAt: '2026-07-31T06:58:51.005Z' vendor: Red Hat product: Red Hat Enterprise Linux AppStream (v. 8) affected: - enterprise_linux 8 - enterprise_linux_ai_rhel_ai - enterprise_linux_server_v_7_els - enterprise_linux_server_optional_v_7_els - enterprise_linux_appstream_v_10 - enterprise_linux_appstream_v_8 - enterprise_linux_appstream_aus_v_8_2 - enterprise_linux_appstream_aus_v_8_4 - enterprise_linux_appstream_eus_extension_v_8_4 - enterprise_linux_appstream_aus_v_8_6 - enterprise_linux_appstream_e4s_v_8_6 - enterprise_linux_appstream_tus_v_8_6 - enterprise_linux_appstream_e4s_v_8_8 - enterprise_linux_appstream_tus_v_8_8 - enterprise_linux_appstream_e4s_v_9_0 - enterprise_linux_appstream_e4s_v_9_2 - enterprise_linux_appstream_eus_v_9_4 - enterprise_linux_appstream_v_9 - enterprise_linux_baseos_v_10 - enterprise_linux_baseos_v_8 - enterprise_linux_baseos_aus_v_8_2 - enterprise_linux_baseos_aus_v_8_4 - enterprise_linux_baseos_eus_extension_v_8_4 - enterprise_linux_baseos_aus_v_8_6 - enterprise_linux_baseos_e4s_v_8_6 - enterprise_linux_baseos_tus_v_8_6 - enterprise_linux_baseos_e4s_v_8_8 - enterprise_linux_baseos_tus_v_8_8 - enterprise_linux_baseos_e4s_v_9_0 - enterprise_linux_baseos_e4s_v_9_2 - enterprise_linux_baseos_eus_v_9_4 - enterprise_linux_baseos_v_9 - enterprise_linux_codeready_linux_builder_v_10 - enterprise_linux_crb_v_8 - codeready_linux_builder_eus_v_9_4 - enterprise_linux_codeready_linux_builder_v_9 - discovery 2 - enterprise_linux_ai 1.5 patched: - enterprise_linux_server_v_7_els - enterprise_linux_server_optional_v_7_els - enterprise_linux_appstream_v_10 - enterprise_linux_appstream_v_8 - enterprise_linux_appstream_aus_v_8_2 - enterprise_linux_appstream_aus_v_8_4 - enterprise_linux_appstream_eus_extension_v_8_4 - enterprise_linux_appstream_aus_v_8_6 - enterprise_linux_appstream_e4s_v_8_6 - enterprise_linux_appstream_tus_v_8_6 - enterprise_linux_appstream_e4s_v_8_8 - enterprise_linux_appstream_tus_v_8_8 - enterprise_linux_appstream_e4s_v_9_0 - enterprise_linux_appstream_e4s_v_9_2 - enterprise_linux_appstream_eus_v_9_4 - enterprise_linux_appstream_v_9 - enterprise_linux_baseos_v_10 - enterprise_linux_baseos_v_8 - enterprise_linux_baseos_aus_v_8_2 - enterprise_linux_baseos_aus_v_8_4 - enterprise_linux_baseos_eus_extension_v_8_4 - enterprise_linux_baseos_aus_v_8_6 - enterprise_linux_baseos_e4s_v_8_6 - enterprise_linux_baseos_tus_v_8_6 - enterprise_linux_baseos_e4s_v_8_8 - enterprise_linux_baseos_tus_v_8_8 - enterprise_linux_baseos_e4s_v_9_0 - enterprise_linux_baseos_e4s_v_9_2 - enterprise_linux_baseos_eus_v_9_4 - enterprise_linux_baseos_v_9 - enterprise_linux_codeready_linux_builder_v_10 - enterprise_linux_crb_v_8 - codeready_linux_builder_eus_v_9_4 - enterprise_linux_codeready_linux_builder_v_9 - discovery 2 - enterprise_linux_ai 1.5 --- ## Overview There is a defect in the CPython “tarfile” module affecting the “TarFile” extraction and entry enumeration APIs. The tar implementation would process tar archives with negative offsets without error, resulting in an infinite loop and deadlock during the parsing of maliciously crafted tar archives. This vulnerability can be mitigated by including the following patch after importing the “tarfile” module:  https://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1 ## Remediation Refer to the linked advisories for vendor-supplied fixes and affected version ranges. ## Vendor advisories - **RHSA-2025:16117** · Red Hat · fixed in: Red Hat Enterprise Linux Server (v. 7 ELS), Red Hat Enterprise Linux Server Optional (v. 7 ELS) · released 2025-09-17 · [advisory](https://access.redhat.com/errata/RHSA-2025:16117) - **RHSA-2025:14984** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) · released 2025-09-02 · [advisory](https://access.redhat.com/errata/RHSA-2025:14984) - **RHSA-2025:14900** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux CRB (v. 8) · released 2025-08-28 · [advisory](https://access.redhat.com/errata/RHSA-2025:14900) - **RHSA-2025:14560** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux BaseOS (v. 8) · released 2025-08-26 · [advisory](https://access.redhat.com/errata/RHSA-2025:14560) - **RHSA-2025:14841** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux CRB (v. 8) · released 2025-08-28 · [advisory](https://access.redhat.com/errata/RHSA-2025:14841) - **RHSA-2025:14546** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux CRB (v. 8) · released 2025-08-26 · [advisory](https://access.redhat.com/errata/RHSA-2025:14546) - **RHSA-2025:16262** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream AUS (v. 8.2), Red Hat Enterprise Linux BaseOS AUS (v. 8.2) · released 2025-09-22 · [advisory](https://access.redhat.com/errata/RHSA-2025:16262) - **RHSA-2025:16078** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream AUS (v.8.4), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) · released 2025-09-17 · [advisory](https://access.redhat.com/errata/RHSA-2025:16078) - **RHSA-2025:16151** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream AUS (v.8.4), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4), Red Hat Enterprise Linux BaseOS AUS (v.8.4), Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) · released 2025-09-18 · [advisory](https://access.redhat.com/errata/RHSA-2025:16151) - **RHSA-2025:16118** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream E4S (v.8.6), Red Hat Enterprise Linux AppStream TUS (v.8.6) · released 2025-09-17 · [advisory](https://access.redhat.com/errata/RHSA-2025:16118) - **RHSA-2025:15968** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream E4S (v.8.6), Red Hat Enterprise Linux AppStream TUS (v.8.6), Red Hat Enterprise Linux BaseOS AUS (v.8.6), Red Hat Enterprise Linux BaseOS E4S (v.8.6), Red Hat Enterprise Linux BaseOS TUS (v.8.6) · released 2025-09-16 · [advisory](https://access.redhat.com/errata/RHSA-2025:15968) - **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 8, Red Hat Enterprise Linux AI (RHEL AI) · no fix planned: Red Hat Enterprise Linux AI (RHEL AI), Red Hat Enterprise Linux 8 · updated 2026-09-06 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-8194.json)