CVE-2024-26760

Kernel crash via incorrect pscsi bio release

Published Apr 3, 2024 · Updated Aug 5, 2026

NULL pointer dereference in the Linux kernel pscsi target before 6.8 allows attackers to crash the kernel through an I/O mapping failure. In pscsi_map_sg(), the failure path passes bio_kmalloc()-allocated request bios to bio_put() instead of pairing bio_uninit() with kfree(), causing bio_free() to dereference a NULL pointer. Reachability requires access to a configured pscsi target and an I/O mapping failure; published assessments disagree on whether that access is local or network-based.

CVSS severity5.5
Medium
EPSS probability0.64%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the Linux kernel pscsi target before 6.8 allows attackers to crash the kernel through an I/O mapping failure. In pscsi_map_sg(), the failure path passes bio_kmalloc()-allocated request bios to bio_put() instead of pairing bio_uninit() with kfree(), causing bio_free() to dereference a NULL pointer. Reachability requires access to a configured pscsi target and an I/O mapping failure; published assessments disagree on whether that access is local or network-based.

The record

CVE
CVE-2024-26760
Published
Apr 3, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 3, 2024CVE 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

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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=066ff571011d8416e903d3d4f1f41e0b5eb91e1d <1cfe9489fb563e9a0c9cdc5ca68257a44428c2ec
  2. Affected versionversion=066ff571011d8416e903d3d4f1f41e0b5eb91e1d <4ebc079f0c7dcda1270843ab0f38ab4edb8f7921
  3. Affected versionversion=066ff571011d8416e903d3d4f1f41e0b5eb91e1d <de959094eb2197636f7c803af0943cb9d3b35804
  4. Affected versionversion=066ff571011d8416e903d3d4f1f41e0b5eb91e1d <f49b20fd0134da84a6bd8108f9e73c077b7d6231
  5. Affected versionversion=5.19

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=066ff571011d8416e903d3d4f1f41e0b5eb91e1d <1cfe9489fb563e9a0c9cdc5ca68257a44428c2ec; version=066ff571011d8416e903d3d4f1f41e0b5eb91e1d <4ebc079f0c7dcda1270843ab0f38ab4edb8f7921; version=066ff571011d8416e903d3d4f1f41e0b5eb91e1d <de959094eb2197636f7c803af0943cb9d3b35804; version=066ff571011d8416e903d3d4f1f41e0b5eb91e1d <f49b20fd0134da84a6bd8108f9e73c077b7d6231; version=5.19

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
9.8Linux kernel CNACVSS:3.1/AV:N/AC:L/PR:N/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.

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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-476NULL Pointer Dereference
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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