CVE-2022-49363

Host crash via unchecked F2FS block address

Published Feb 26, 2025 · Updated Aug 15, 2026

Denial of service in affected Linux kernel F2FS releases allows local users to panic the kernel via a malformed filesystem image. f2fs_do_zero_range() trusts inconsistent inode block mappings and passes an invalid block address to the segment information table update path without a sanity check. An attacker needs local access to make the kernel process a crafted F2FS image and invoke fallocate; triggering the flaw crashes the host rather than damaging data by itself.

CVSS severity5.5
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in affected Linux kernel F2FS releases allows local users to panic the kernel via a malformed filesystem image. f2fs_do_zero_range() trusts inconsistent inode block mappings and passes an invalid block address to the segment information table update path without a sanity check. An attacker needs local access to make the kernel process a crafted F2FS image and invoke fallocate; triggering the flaw crashes the host rather than damaging data by itself.

The record

CVE
CVE-2022-49363
Published
Feb 26, 2025
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=4.2
  2. Affected versionversion=75cd4e098d178433436abce08146a21647bb4585 <25f8236213a91efdf708b9d77e9e51b6fc3e141c
  3. Affected versionversion=75cd4e098d178433436abce08146a21647bb4585 <470493be19a5730ed432e3ac0f29a2ee7fc6c557
  4. Affected versionversion=75cd4e098d178433436abce08146a21647bb4585 <7361c9f2bd6a8f0cbb41cdea9aff04765ff23f67
  5. Affected versionversion=75cd4e098d178433436abce08146a21647bb4585 <805b48b234a2803cb7daec7f158af12f0fbaefac
  6. Affected versionversion=75cd4e098d178433436abce08146a21647bb4585 <a34d7b49894b0533222188a52e2958750f830efd
  7. Affected versionversion=75cd4e098d178433436abce08146a21647bb4585 <f2e1c38b5ac64eb1a16a89c52fb419409d12c25b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.2; version=75cd4e098d178433436abce08146a21647bb4585 <25f8236213a91efdf708b9d77e9e51b6fc3e141c; version=75cd4e098d178433436abce08146a21647bb4585 <470493be19a5730ed432e3ac0f29a2ee7fc6c557; version=75cd4e098d178433436abce08146a21647bb4585 <7361c9f2bd6a8f0cbb41cdea9aff04765ff23f67; version=75cd4e098d178433436abce08146a21647bb4585 <805b48b234a2803cb7daec7f158af12f0fbaefac; version=75cd4e098d178433436abce08146a21647bb4585 <a34d7b49894b0533222188a52e2958750f830efd; version=75cd4e098d178433436abce08146a21647bb4585 <f2e1c38b5ac64eb1a16a89c52fb419409d12c25b

Published CVSS scores

7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5NIST NVDCVSS: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

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

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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