CVE-2023-52482

Kernel information disclosure via omitted Hygon SRSO flag

Published Feb 29, 2024 · Updated May 11, 2026

Information disclosure in affected Linux kernel branches beginning with 4.20 allows local users to read kernel data through SRSO. The Hygon family 18h entry in arch/x86/kernel/cpu/common.c omits the SRSO flag, so the kernel does not select the available mitigation. Exploitation requires local access, a Hygon processor, a kASLR break, and usable kernel gadgets; the resulting side channel exposes kernel information.

CVSS severity7.8
High
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in affected Linux kernel branches beginning with 4.20 allows local users to read kernel data through SRSO. The Hygon family 18h entry in arch/x86/kernel/cpu/common.c omits the SRSO flag, so the kernel does not select the available mitigation. Exploitation requires local access, a Hygon processor, a kASLR break, and usable kernel gadgets; the resulting side channel exposes kernel information.

The record

CVE
CVE-2023-52482
Published
Feb 29, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-787
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 29, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=4.20
  2. Affected versionversion=c9661c1e80b609cd038db7c908e061f0535804ef <6ce2f297a7168274547d0b5aea6c7c16268b8a96
  3. Affected versionversion=c9661c1e80b609cd038db7c908e061f0535804ef <a5ef7d68cea1344cf524f04981c2b3f80bedbb0d
  4. Affected versionversion=c9661c1e80b609cd038db7c908e061f0535804ef <cf43b304b6952b549d58feabc342807b334f03d4
  5. Affected versionversion=c9661c1e80b609cd038db7c908e061f0535804ef <e7ea043bc3f19473561c08565047b3f1671bf35d
  6. Affected versionversion=c9661c1e80b609cd038db7c908e061f0535804ef <f090a8b4d2e3ec6f318d6fdab243a2edc5a8cc37

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.20; version=c9661c1e80b609cd038db7c908e061f0535804ef <6ce2f297a7168274547d0b5aea6c7c16268b8a96; version=c9661c1e80b609cd038db7c908e061f0535804ef <a5ef7d68cea1344cf524f04981c2b3f80bedbb0d; version=c9661c1e80b609cd038db7c908e061f0535804ef <cf43b304b6952b549d58feabc342807b334f03d4; version=c9661c1e80b609cd038db7c908e061f0535804ef <e7ea043bc3f19473561c08565047b3f1671bf35d; version=c9661c1e80b609cd038db7c908e061f0535804ef <f090a8b4d2e3ec6f318d6fdab243a2edc5a8cc37

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8UbuntuCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-787Out-of-bounds Write

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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