CVE-2022-50753

Kernel memory corruption via unchecked SSA offset

Published Dec 24, 2025 · Updated Dec 24, 2025

Use-after-free in Linux kernel F2FS recovery allows attackers to corrupt kernel memory by inducing the mount of a crafted image. Recovery and garbage collection trust the SSA summary's ofs_in_node field and index beyond a 4 KB node page when it exceeds ADDRS_PER_PAGE(). A victim or automounter must mount the image; the resulting out-of-bounds access can disclose or alter adjacent kernel memory and trigger an oops or panic.

CVSS severity7.8
High
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Linux kernel F2FS recovery allows attackers to corrupt kernel memory by inducing the mount of a crafted image. Recovery and garbage collection trust the SSA summary's ofs_in_node field and index beyond a 4 KB node page when it exceeds ADDRS_PER_PAGE(). A victim or automounter must mount the image; the resulting out-of-bounds access can disclose or alter adjacent kernel memory and trigger an oops or panic.

The record

CVE
CVE-2022-50753
Published
Dec 24, 2025
Updated
Dec 24, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 24, 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 <0922ad64ccefa3e483e84355942b86e13c8fea68
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4a8e8bf280703e04e0b9d91f101e1fdd9a5bd09e
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <73687c53919f49dff3852155621dab7a35c52854
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c6ad7fd16657ebd34a87a97d9588195aae87597d
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c99860f9a75079f339ed7670425b1ac58f26e2ff
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e168f819bfa42459b14f479e55ebd550bcc78899

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0922ad64ccefa3e483e84355942b86e13c8fea68; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4a8e8bf280703e04e0b9d91f101e1fdd9a5bd09e; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <73687c53919f49dff3852155621dab7a35c52854; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c6ad7fd16657ebd34a87a97d9588195aae87597d; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c99860f9a75079f339ed7670425b1ac58f26e2ff; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e168f819bfa42459b14f479e55ebd550bcc78899

Published CVSS scores

7.8UbuntuCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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