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CVE-2020-12655

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Date: May 5, 2020

An issue was discovered in xfs_agf_verify in fs/xfs/libxfs/xfs_alloc.c in the Linux kernel through 5.6.10. Attackers may trigger a sync of excessive duration via an XFS v5 image with crafted metadata, aka CID-d0c7feaf8767.

Language: C

Severity Score

Related Resources (23)

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IO5XIQSRI747P4RVVTNX7TUPEOCF4OPU/
https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html
https://github.com/torvalds/linux/commit/d0c7feaf87678371c2c09b3709400be416b2dc62
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IZ2X3TM6RGRUS3KZAS26IJO5XGU7TBBR/
https://usn.ubuntu.com/4465-1/
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html
https://people.canonical.com/~ubuntu-security/cve/CVE-2020-12655
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ES5C6ZCMALBEBMKNNCTBSLLSYGFZG3FF/
https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html
https://security-tracker.debian.org/tracker/CVE-2020-12655
https://lore.kernel.org/linux-xfs/20200221153803.GP9506@magnolia/
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d0c7feaf87678371c2c09b3709400be416b2dc62
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IZ2X3TM6RGRUS3KZAS26IJO5XGU7TBBR/
https://lists.debian.org/debian-lts-announce/2020/08/msg00019.html
https://access.redhat.com/security/cve/CVE-2020-12655
https://nvd.nist.gov/vuln/detail/CVE-2020-12655
https://usn.ubuntu.com/4483-1/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IO5XIQSRI747P4RVVTNX7TUPEOCF4OPU/
https://usn.ubuntu.com/4485-1/
https://security.netapp.com/advisory/ntap-20200608-0001/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ES5C6ZCMALBEBMKNNCTBSLLSYGFZG3FF/
https://lore.kernel.org/linux-xfs/20200221153803.GP9506%40magnolia/
https://www.mend.io/vulnerability-database/CVE-2020-12655

Severity Score

Weakness Type (CWE)

Uncontrolled Resource Consumption ('Resource Exhaustion')

CWE-400

Loop with Unreachable Exit Condition ('Infinite Loop')

CWE-835

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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