Loading vulnerability…
CVE-2021-4037 is an improper permission-inheritance vulnerability in Linux kernel XFS file creation associated with inode_init_owner(). When a user creates a file in a writable SGID directory belonging to a group of which the user is not a member, XFS can assign unintended group ownership and retain group-execution and SGID permission bits. XFS inherited the SGID bit from the parent inode instead of applying the generic ownership-initialization behavior. The issue results from an incomplete fix for CVE-2018-13405 that did not cover XFS and can grant excessive group permissions.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
13 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Linux kernel security regression involving CVE-2018-13405. The advisory does not explain the regression's mechanism or impact. Red Hat provides a fix through RHSA-2022:4829 in kernel version 4.18.0-305.49.1.el8_4 for the listed Red Hat Enterprise Linux 8.4 products; a reboot is required.
Mentioned only in the context of an RHEL 7.9 LTP testcase regression; the advisory does not describe this vulnerability or state that this update addresses it.
Linux kernel security regression related to CVE-2018-13405.
Linux kernel security regression associated with CVE-2018-13405.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.