CVE-2023-52745

Kernel crash via mismatched IPoIB queue counts

Published May 21, 2024 · Updated Aug 5, 2026

NULL pointer dereference in Linux kernel IPoIB allows local users to crash the system by sending traffic over a PKEY child interface. The IPoIB interface initialization in drivers/infiniband/ulp/ipoib/ipoib_main.c gives a legacy child multiple transmit and receive queues even when its parent supports only one of each. Exploitation requires local access, a legacy IPoIB device, creation of a PKEY child interface, and traffic that reaches the mismatched queues, causing a kernel crash.

CVSS severity5.5
Medium
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

NULL pointer dereference in Linux kernel IPoIB allows local users to crash the system by sending traffic over a PKEY child interface. The IPoIB interface initialization in drivers/infiniband/ulp/ipoib/ipoib_main.c gives a legacy child multiple transmit and receive queues even when its parent supports only one of each. Exploitation requires local access, a legacy IPoIB device, creation of a PKEY child interface, and traffic that reaches the mismatched queues, causing a kernel crash.

The record

CVE
CVE-2023-52745
Published
May 21, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 21, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2aecfec735f16f99c059db956edfd95a32458d22
  2. Affected versionversion=4.14.303 <4.15
  3. Affected versionversion=4.19.270 <4.20
  4. Affected versionversion=4.9.337 <4.10
  5. Affected versionversion=5.10.163 <5.10.168
  6. Affected versionversion=5.15.86 <5.15.94
  7. Affected versionversion=5.4.229 <5.4.232
  8. Affected versionversion=6.0.16 <6.1
  9. Affected versionversion=6.1.2 <6.1.12
  10. Affected versionversion=8fa3ee8ef185eb3e8be44f282721b05a03e6f888
  11. Affected versionversion=bab775fa9c4f4b4da30c9cc99be4bec19fb01659
  12. Affected versionversion=bc2f5760b47cba4a76be9371806f8f10fccf71a9
  13. Affected versionversion=ca48174a7643a7e6dd31c4338c5cde49552e138e <1b4ef90cbcfa603b3bb536fbd6f261197012b6f6
  14. Affected versionversion=d21714134505bc23daa0455b295f3b63730b3b42 <b1afb666c32931667c15ad1b58e7203f0119dcaf
  15. Affected versionversion=d4bf3fcccd188db9f3310d93472041cdefba97bf <4a779187db39b2f32d048a752573e56e4e77807f
  16. Affected versionversion=dbc94a0fb81771a38733c0e8f2ea8c4fa6934dc1 <e632291a2dbce45a24cddeb5fe28fe71d724ba43
  17. Affected versionversion=ee0e9b2c4b9c35837553124b4912230a7e7c7212 <7197460dcd43ff0e4a502ba855dd82d37c2848cc

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2aecfec735f16f99c059db956edfd95a32458d22; version=4.14.303 <4.15; version=4.19.270 <4.20; version=4.9.337 <4.10; version=5.10.163 <5.10.168; version=5.15.86 <5.15.94; version=5.4.229 <5.4.232; version=6.0.16 <6.1; version=6.1.2 <6.1.12; version=8fa3ee8ef185eb3e8be44f282721b05a03e6f888; version=bab775fa9c4f4b4da30c9cc99be4bec19fb01659; version=bc2f5760b47cba4a76be9371806f8f10fccf71a9; version=ca48174a7643a7e6dd31c4338c5cde49552e138e <1b4ef90cbcfa603b3bb536fbd6f261197012b6f6; version=d21714134505bc23daa0455b295f3b63730b3b42 <b1afb666c32931667c15ad1b58e7203f0119dcaf; version=d4bf3fcccd188db9f3310d93472041cdefba97bf <4a779187db39b2f32d048a752573e56e4e77807f; version=dbc94a0fb81771a38733c0e8f2ea8c4fa6934dc1 <e632291a2dbce45a24cddeb5fe28fe71d724ba43; version=ee0e9b2c4b9c35837553124b4912230a7e7c7212 <7197460dcd43ff0e4a502ba855dd82d37c2848cc

Published CVSS scores

5.5Canonical UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

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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