CVE-2022-50293

Kernel crash via Btrfs ENOMEM assertion

Published Sep 15, 2025 · Updated Sep 15, 2025

Reachable assertion in Linux Btrfs before 6.2 allows local users to crash the kernel by exhausting memory during extent removal. btrfs_drop_extents() invokes BUG_ON() when extent-reference updates return ENOMEM instead of aborting the transaction and returning the error. Exploitation requires local low-privileged access and a mounted Btrfs filesystem; success interrupts the host without reported data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reachable assertion in Linux Btrfs before 6.2 allows local users to crash the kernel by exhausting memory during extent removal. btrfs_drop_extents() invokes BUG_ON() when extent-reference updates return ENOMEM instead of aborting the transaction and returning the error. Exploitation requires local low-privileged access and a mounted Btrfs filesystem; success interrupts the host without reported data disclosure or modification.

The record

CVE
CVE-2022-50293
Published
Sep 15, 2025
Updated
Sep 15, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-617, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <162d053e15fe985f754ef495a96eb3db970c43ed
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1baf3370e2dc5e6bd1368348736189457dab2a27
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <50f993da945074b2a069da099a0331b23a0c89a0
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7fbcb635c8fc927d139f3302babcf1b42c09265c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <162d053e15fe985f754ef495a96eb3db970c43ed; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1baf3370e2dc5e6bd1368348736189457dab2a27; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <50f993da945074b2a069da099a0331b23a0c89a0; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7fbcb635c8fc927d139f3302babcf1b42c09265c

Published CVSS scores

5.5UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-617Reachable Assertion
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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