CVE-2022-50749

Incorrect process accounting via exponent overflow

Published Dec 24, 2025 · Updated Dec 24, 2025

Integer overflow in Linux kernel process accounting allows local users to produce incorrect records through oversized metric values. The encode_comp_t() path packs an exponent and mantissa into 16-bit comp_t but fails to saturate when the exponent exceeds its representable range. The flaw is reached only when process accounting is enabled and a recorded process metric grows large enough to cross that limit.

CVSS severity3.3
Low
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in Linux kernel process accounting allows local users to produce incorrect records through oversized metric values. The encode_comp_t() path packs an exponent and mantissa into 16-bit comp_t but fails to saturate when the exponent exceeds its representable range. The flaw is reached only when process accounting is enabled and a recorded process metric grows large enough to cross that limit.

The record

CVE
CVE-2022-50749
Published
Dec 24, 2025
Updated
Dec 24, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 24, 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 <0aac6e60c464a5f942f995428e67f8ae1c422250
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1750a0983c455a9b3badd848471fc8d58cb61f67
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2224897d8187dc22a83e05d9361efcccf67bcf12
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6edd0cdee5780fd5f43356b72b29a2a6d48ef6da
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a815a3e019456c94b03bd183e7ac22fd29e9e6fd
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c5f31c655bcc01b6da53b836ac951c1556245305
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cf60bbca1b83a7e0927e36dbf178328982927886
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e93f995a591c352d35d89c518c54f790e1537754
  9. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ebe16676e1dcaa4556ec4d36ca40c82e99e88cfa

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0aac6e60c464a5f942f995428e67f8ae1c422250; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1750a0983c455a9b3badd848471fc8d58cb61f67; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2224897d8187dc22a83e05d9361efcccf67bcf12; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6edd0cdee5780fd5f43356b72b29a2a6d48ef6da; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a815a3e019456c94b03bd183e7ac22fd29e9e6fd; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c5f31c655bcc01b6da53b836ac951c1556245305; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cf60bbca1b83a7e0927e36dbf178328982927886; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e93f995a591c352d35d89c518c54f790e1537754; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ebe16676e1dcaa4556ec4d36ca40c82e99e88cfa

Published CVSS scores

3.3SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
4.8SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

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

No sourced classifications are available.

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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