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VulnerabilityPublished Updated

CVE-2024-23850: Linux kernel · Reachable Assertion

Affects Linux kernelSource CVE Database V5

0

Not known to be exploited · CVSS 5.5 Medium : upgrade to 6.7.2 when convenient.

Data as of 26 Oct 2026, 14:05 UTC

CVSS 3.1 base score
5.5Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.3% chance of exploitation in 30 days – higher than 23% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 6.7.2
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 23 Jan 2024

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade the Red Hat redhat/kernel package to 6.7.2.

Affected software

ProductAffectedFixed in
Red Hatredhat/kernelpkg:rpm/redhat/kernelOther threatsAffected
  • <6.7.2
Fixed in
  • 6.7.2

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

  1. Monitor Linux kernel updates and apply patches addressing CVE-2024-23850 promptly once released.
  2. Restrict local user privileges to prevent untrusted users from creating or manipulating Btrfs subvolumes.
  3. Implement strict access controls and auditing on systems using Btrfs to detect unusual subvolume creation or modification activities.
  4. Consider temporarily avoiding Btrfs subvolume creation or usage in environments where local privilege separation is weak until patched.
  5. Employ kernel crash monitoring and automated recovery mechanisms to minimize downtime in case of assertion failures.
  6. For critical systems, evaluate alternative filesystems or configurations that do not expose this vulnerability until a fix is applied.
  7. Educate system administrators about the vulnerability to ensure awareness and readiness to respond to potential incidents.

Description

In btrfs_get_root_ref in fs/btrfs/disk-io.c in the Linux kernel through 6.7.1, there can be an assertion failure and crash because a subvolume can be read out too soon after its root item is inserted upon subvolume creation.

References

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