CVE-2023-53135

KASAN fault via unchecked stack read

Published May 2, 2025 · Updated May 11, 2026

Out-of-bounds read in affected RISC-V Linux kernel releases allows local users to trigger a KASAN fault during stack unwinding. In arch/riscv/kernel/stacktrace.c, walk_stackframe dereferences stack-pointer locations in imprecise mode without READ_ONCE_NOCHECK, causing KASAN to flag reads outside the current frame. The documented path requires RISC-V, CONFIG_FRAME_POINTER unset, and KASAN enabled; the reported consequence is a kernel fault rather than data modification.

CVSS severity7.1
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in affected RISC-V Linux kernel releases allows local users to trigger a KASAN fault during stack unwinding. In arch/riscv/kernel/stacktrace.c, walk_stackframe dereferences stack-pointer locations in imprecise mode without READ_ONCE_NOCHECK, causing KASAN to flag reads outside the current frame. The documented path requires RISC-V, CONFIG_FRAME_POINTER unset, and KASAN enabled; the reported consequence is a kernel fault rather than data modification.

The record

CVE
CVE-2023-53135
Published
May 2, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 2, 2025CVE 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=4.15
  2. Affected versionversion=5d8544e2d0075a5f3c9a2cf27152354d54360da1 <17fa90ffba20743c946920fbb0afe160d0ead8c9
  3. Affected versionversion=5d8544e2d0075a5f3c9a2cf27152354d54360da1 <324912d6c0c4006711054d389faa2239c1655e1e
  4. Affected versionversion=5d8544e2d0075a5f3c9a2cf27152354d54360da1 <3a9418d2c93c1c86ce4d0595112d91c7a8e70c2c
  5. Affected versionversion=5d8544e2d0075a5f3c9a2cf27152354d54360da1 <3de277af481ab931fab9e295ad8762692920732a
  6. Affected versionversion=5d8544e2d0075a5f3c9a2cf27152354d54360da1 <76950340cf03b149412fe0d5f0810e52ac1df8cb
  7. Affected versionversion=5d8544e2d0075a5f3c9a2cf27152354d54360da1 <a99a61d9e1bfca2fc37d223a6a185c0eb66aba02

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.15; version=5d8544e2d0075a5f3c9a2cf27152354d54360da1 <17fa90ffba20743c946920fbb0afe160d0ead8c9; version=5d8544e2d0075a5f3c9a2cf27152354d54360da1 <324912d6c0c4006711054d389faa2239c1655e1e; version=5d8544e2d0075a5f3c9a2cf27152354d54360da1 <3a9418d2c93c1c86ce4d0595112d91c7a8e70c2c; version=5d8544e2d0075a5f3c9a2cf27152354d54360da1 <3de277af481ab931fab9e295ad8762692920732a; version=5d8544e2d0075a5f3c9a2cf27152354d54360da1 <76950340cf03b149412fe0d5f0810e52ac1df8cb; version=5d8544e2d0075a5f3c9a2cf27152354d54360da1 <a99a61d9e1bfca2fc37d223a6a185c0eb66aba02

Published CVSS scores

5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.1NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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-125Out-of-bounds Read
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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