CVE-2020-12655

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-05-05 · updated 2026-06-17
Weakness: CWE-835

Description

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.

Affected products

Linux kernel: through 5.6.10

References

http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d0c7feaf87678371c2c09b3709400be416b2dc62
https://github.com/torvalds/linux/commit/d0c7feaf87678371c2c09b3709400be416b2dc62
https://lists.debian.org/debian-lts-announce/2020/08/msg00019.html
https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html
https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ES5C6ZCMALBEBMKNNCTBSLLSYGFZG3FF/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IO5XIQSRI747P4RVVTNX7TUPEOCF4OPU/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IZ2X3TM6RGRUS3KZAS26IJO5XGU7TBBR/
https://lore.kernel.org/linux-xfs/20200221153803.GP9506%40magnolia/
https://security.netapp.com/advisory/ntap-20200608-0001/
https://usn.ubuntu.com/4465-1/

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