CVE-2024-35979

Kernel memory corruption via freed RAID1 bio

Published May 20, 2024 · Updated Aug 5, 2026

Use-after-free in the Linux kernel 6.6 RAID1 driver allows local users to corrupt kernel memory by writing to an array with a blocked member. raid1_write_request stores the caller's original bio in r1_bio->bios[0], but free_r1bio passes that alias to bio_put when it encounters the blocked device, freeing an object that remains referenced. A writable RAID1-backed file or array and a blocked member are required; reuse of the freed bio can disclose or modify kernel memory and crash the host.

CVSS severity7.8
High
EPSS probability0.23%
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 the Linux kernel 6.6 RAID1 driver allows local users to corrupt kernel memory by writing to an array with a blocked member. raid1_write_request stores the caller's original bio in r1_bio->bios[0], but free_r1bio passes that alias to bio_put when it encounters the blocked device, freeing an object that remains referenced. A writable RAID1-backed file or array and a blocked member are required; reuse of the freed bio can disclose or modify kernel memory and crash the host.

The record

CVE
CVE-2024-35979
Published
May 20, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 20, 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

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=6.6
  2. Affected versionversion=992db13a4aee766c8bfbf046ad15c2db5fa7cab8 <3f28d49a328fe20926995d5fbdc92da665596268
  3. Affected versionversion=992db13a4aee766c8bfbf046ad15c2db5fa7cab8 <f423f41b7679c09abb26d2bd54be5cbef23c9446
  4. Affected versionversion=992db13a4aee766c8bfbf046ad15c2db5fa7cab8 <fcf3f7e2fc8a53a6140beee46ec782a4c88e4744

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.6; version=992db13a4aee766c8bfbf046ad15c2db5fa7cab8 <3f28d49a328fe20926995d5fbdc92da665596268; version=992db13a4aee766c8bfbf046ad15c2db5fa7cab8 <f423f41b7679c09abb26d2bd54be5cbef23c9446; version=992db13a4aee766c8bfbf046ad15c2db5fa7cab8 <fcf3f7e2fc8a53a6140beee46ec782a4c88e4744

Published CVSS scores

7.8Linux Kernel CVE TeamCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5OracleCVSS: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

CWE-416Use After Free
T1068Exploitation for Privilege Escalation

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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