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Review reviewHigh

CVE-2024-38570

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: gfs2: Fix potential glock use-after-free on unmount When a DLM lockspace is released and there ares still locks in that lockspace, DLM will unlock those locks automatically. Commit fb6791d100d1b started exploiting this behavior to speed up filesystem unmount: gfs2 would simply free glocks it didn't want to unlock and then release the lockspace. This didn't take the bast callbacks for asynchronous lock contention notifications into account, which remain active until until a lock is unlocked or its lockspace is released. To p...

CVSS
7.8
EPSS
0.68%
49.0% percentile
CISA KEV
Not listed
Published
2024.06.19
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.68%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: gfs2: Fix potential glock use-after-free on unmount When a DLM lockspace is released and there ares still locks in that lockspace, DLM will unlock those locks automatically. Commit fb6791d100d1b started exploiting this behavior to speed up filesystem unmount: gfs2 would simply free glocks it didn't want to unlock and then release the lockspace. This didn't take the bast callbacks for asynchronous lock contention notifications into account, which remain active until until a lock is unlocked or its lockspace is released. To p...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= fb6791d100d1bba20b5cdbc4912e1f7086ec60f8 < 0636b34b44589b142700ac137b5f69802cfe2e37, >= fb6791d100d1bba20b5cdbc4912e1f7086ec60f8 < e42e8a24d7f02d28763d16ca7ec5fc6d1f142af0, >= fb6791d100d1bba20b5cdbc4912e1f7086ec60f8 < 501cd8fabf621d10bd4893e37f6ce6c20523c8ca, >= fb6791d100d1bba20b5cdbc4912e1f7086ec60f8 < d98779e687726d8f8860f1c54b5687eec5f63a73, >= 3.8, >= 3.8 < 6.6.33, >= 6.7 < 6.8.12, >= 6.9 < 6.9.3
Fixed versions
6.6.33, 6.8.12, 6.9.3

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-416
CVE-2024-38570 — Linux Linux, linux kernel | SECUFOCUS NOW