CVE-2022-50569

Kernel warning via stale IPComp scratch pointer

Published Oct 22, 2025 · Updated Oct 22, 2025

Memory-management flaw in the Linux kernel IPComp component allows local users to invoke an invalid virtual-memory free after allocation failure. ipcomp_free_scratches leaves the global ipcomp_scratches pointer stale after freeing per-CPU buffers, so a later failed allocation preserves the obsolete address and cleanup passes it to vfree. Exploitation requires local low-privileged access and an allocation failure; the published mechanism demonstrates a kernel warning but does not identify a reliable crash or data-access path.

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

What happened

Memory-management flaw in the Linux kernel IPComp component allows local users to invoke an invalid virtual-memory free after allocation failure. ipcomp_free_scratches leaves the global ipcomp_scratches pointer stale after freeing per-CPU buffers, so a later failed allocation preserves the obsolete address and cleanup passes it to vfree. Exploitation requires local low-privileged access and an allocation failure; the published mechanism demonstrates a kernel warning but does not identify a reliable crash or data-access path.

The record

CVE
CVE-2022-50569
Published
Oct 22, 2025
Updated
Oct 22, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 22, 2025Record 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <03155680191ef0f004b1d6a5714c5b8cd271ab61
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <18373ed500f7cd53e24d9b0bd0f1c09d78dba87e
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1e8abde895b3ac6a368cbdb372e8800c49e73a28
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2c19945ce8095d065df550e7fe350cd5cc40c6e6
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8a04d2fc700f717104bfb95b0f6694e448a4537f
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a39f456d62810c0efb43cead22f98d95b53e4b1a
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <be81c44242b20fc3bdcc73480ef8aaee56f5d0b6
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <debca61df6bc2f65e020656c9c5b878d6b38d30f
  9. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f3bdba4440d82e0da2b1bfc35d3836c8a8e00677

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <03155680191ef0f004b1d6a5714c5b8cd271ab61; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <18373ed500f7cd53e24d9b0bd0f1c09d78dba87e; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1e8abde895b3ac6a368cbdb372e8800c49e73a28; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2c19945ce8095d065df550e7fe350cd5cc40c6e6; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8a04d2fc700f717104bfb95b0f6694e448a4537f; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a39f456d62810c0efb43cead22f98d95b53e4b1a; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <be81c44242b20fc3bdcc73480ef8aaee56f5d0b6; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <debca61df6bc2f65e020656c9c5b878d6b38d30f; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f3bdba4440d82e0da2b1bfc35d3836c8a8e00677

Published CVSS scores

7.8kernel.orgCVSS: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 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.

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Technologies

Your stack

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Your stack

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