CVE-2022-49789

System crash via truncated zfcp request identifier

Published May 1, 2025 · Updated Aug 5, 2026

Double free in the Linux kernel zfcp SCSI driver allows local users to crash s390x systems during adapter recovery or shutdown. The zfcp_fsf_req_send() function stores a 64-bit FSF request identifier in a signed 32-bit int, so truncation or sign extension prevents zfcp_reqlist_find_rm() from removing a failed request from its hash table. The stale entry is freed again when the adapter resets or shuts down after zfcp_qdio_send() fails; the failure requires a zfcp-backed s390x system and an identifier with bit 31 set or a value beyond 32 bits.

CVSS severity7.8
High
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Double free in the Linux kernel zfcp SCSI driver allows local users to crash s390x systems during adapter recovery or shutdown. The zfcp_fsf_req_send() function stores a 64-bit FSF request identifier in a signed 32-bit int, so truncation or sign extension prevents zfcp_reqlist_find_rm() from removing a failed request from its hash table. The stale entry is freed again when the adapter resets or shuts down after zfcp_qdio_send() fails; the failure requires a zfcp-backed s390x system and an identifier with bit 31 set or a value beyond 32 bits.

The record

CVE
CVE-2022-49789
Published
May 1, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-415, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=2.6.34
  2. Affected versionversion=e60a6d69f1f84c2ef1cc63aefaadfe7ae9f12934 <0954256e970ecf371b03a6c9af2cf91b9c4085ff
  3. Affected versionversion=e60a6d69f1f84c2ef1cc63aefaadfe7ae9f12934 <11edbdee4399401f533adda9bffe94567aa08b96
  4. Affected versionversion=e60a6d69f1f84c2ef1cc63aefaadfe7ae9f12934 <1bf8ed585501bb2dd0b5f67c824eab45adfbdccd
  5. Affected versionversion=e60a6d69f1f84c2ef1cc63aefaadfe7ae9f12934 <90a49a6b015fa439cd62e45121390284c125a91f
  6. Affected versionversion=e60a6d69f1f84c2ef1cc63aefaadfe7ae9f12934 <d2c7d8f58e9cde8ac8d1f75e9d66c2a813ffe0ab

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.34; version=e60a6d69f1f84c2ef1cc63aefaadfe7ae9f12934 <0954256e970ecf371b03a6c9af2cf91b9c4085ff; version=e60a6d69f1f84c2ef1cc63aefaadfe7ae9f12934 <11edbdee4399401f533adda9bffe94567aa08b96; version=e60a6d69f1f84c2ef1cc63aefaadfe7ae9f12934 <1bf8ed585501bb2dd0b5f67c824eab45adfbdccd; version=e60a6d69f1f84c2ef1cc63aefaadfe7ae9f12934 <90a49a6b015fa439cd62e45121390284c125a91f; version=e60a6d69f1f84c2ef1cc63aefaadfe7ae9f12934 <d2c7d8f58e9cde8ac8d1f75e9d66c2a813ffe0ab

Published CVSS scores

7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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

CWE-415Double Free
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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo