CVE-2023-52474

Local privilege escalation via hfi1 SDMA memory corruption

Published Feb 26, 2024 · Updated Aug 5, 2026

Memory corruption in Linux kernel hfi1 allows local users to elevate privileges through crafted user SDMA requests. user_sdma_txadd() ignores iov_len and can copy through PAGE_SIZE, while SDMA pin-cache races can unpin or free referenced mmu_rb_node objects. An unprivileged local user needs access to the world-accessible hfi1 character device; exploitation grants kernel-level access or crashes the host.

CVSS severity7.8
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in Linux kernel hfi1 allows local users to elevate privileges through crafted user SDMA requests. user_sdma_txadd() ignores iov_len and can copy through PAGE_SIZE, while SDMA pin-cache races can unpin or free referenced mmu_rb_node objects. An unprivileged local user needs access to the world-accessible hfi1 character device; exploitation grants kernel-level access or crashes the host.

The record

CVE
CVE-2023-52474
Published
Feb 26, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 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=4.3
  2. Affected versionversion=7724105686e718ac476a6ad3304fea2fbcfcffde <00cbce5cbf88459cd1aa1d60d0f1df15477df127
  3. Affected versionversion=7724105686e718ac476a6ad3304fea2fbcfcffde <7e6010f79b58f45b204cf18aa58f4b73c3f30adc
  4. Affected versionversion=7724105686e718ac476a6ad3304fea2fbcfcffde <9c4c6512d7330b743c4ffd18bd999a86ca26db0d
  5. Affected versionversion=7724105686e718ac476a6ad3304fea2fbcfcffde <a2bd706ab63509793b5cd5065e685b7ef5cba678
  6. Affected versionversion=7724105686e718ac476a6ad3304fea2fbcfcffde <c76cb8f4bdf26d04cfa5485a93ce297dba5e6a80
  7. Affected versionversion=7724105686e718ac476a6ad3304fea2fbcfcffde <dce59b5443700fbd0d2433ec6e4d4cf063448844

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.3; version=7724105686e718ac476a6ad3304fea2fbcfcffde <00cbce5cbf88459cd1aa1d60d0f1df15477df127; version=7724105686e718ac476a6ad3304fea2fbcfcffde <7e6010f79b58f45b204cf18aa58f4b73c3f30adc; version=7724105686e718ac476a6ad3304fea2fbcfcffde <9c4c6512d7330b743c4ffd18bd999a86ca26db0d; version=7724105686e718ac476a6ad3304fea2fbcfcffde <a2bd706ab63509793b5cd5065e685b7ef5cba678; version=7724105686e718ac476a6ad3304fea2fbcfcffde <c76cb8f4bdf26d04cfa5485a93ce297dba5e6a80; version=7724105686e718ac476a6ad3304fea2fbcfcffde <dce59b5443700fbd0d2433ec6e4d4cf063448844

Published CVSS scores

7.8NIST NVDCVSS: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

T1068Exploitation for Privilege Escalation

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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