CVE-2024-35880

Kernel memory exposure and corruption via mmap race

Published May 19, 2024 · Updated Aug 5, 2026

Use-after-free in Linux kernel io_uring 6.6.5 through 6.6.25 and 6.7 allows local users to read or alter kernel memory via a race. io_uring_validate_mmap_request() maps bl->buf_ring while concurrent buffer-ring unregister can release its unreferenced io_buffer_list. An unprivileged local account can drive both sides when io_uring is enabled, yielding stale shared-memory access or a kernel panic.

CVSS severity7.8
High
EPSS probability0.69%
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 io_uring 6.6.5 through 6.6.25 and 6.7 allows local users to read or alter kernel memory via a race. io_uring_validate_mmap_request() maps bl->buf_ring while concurrent buffer-ring unregister can release its unreferenced io_buffer_list. An unprivileged local account can drive both sides when io_uring is enabled, yielding stale shared-memory access or a kernel panic.

The record

CVE
CVE-2024-35880
Published
May 19, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 19, 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=09f7520048eaaee9709091cd2787966f807da7c5 <65938e81df2197203bda4b9a0c477e7987218d66
  2. Affected versionversion=5cf4f52e6d8aa2d3b7728f568abbf9d42a3af252 <561e4f9451d65fc2f7eef564e0064373e3019793
  3. Affected versionversion=5cf4f52e6d8aa2d3b7728f568abbf9d42a3af252 <5fd8e2359498043e0b5329a05f02d10a9eb91eb9
  4. Affected versionversion=6.6.5 <6.6.26
  5. Affected versionversion=6.7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=09f7520048eaaee9709091cd2787966f807da7c5 <65938e81df2197203bda4b9a0c477e7987218d66; version=5cf4f52e6d8aa2d3b7728f568abbf9d42a3af252 <561e4f9451d65fc2f7eef564e0064373e3019793; version=5cf4f52e6d8aa2d3b7728f568abbf9d42a3af252 <5fd8e2359498043e0b5329a05f02d10a9eb91eb9; version=6.6.5 <6.6.26; version=6.7
The Linux Kernel Organization · Linux Kernelversion=09f7520048ea <65938e81df21; version=5cf4f52e6d8a <561e4f9451d6; version=5cf4f52e6d8a <5fd8e2359498; version=6.7

Published CVSS scores

7.8Linux Kernel CNACVSS: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.

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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

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

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Your stack

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