CVE-2026-52995

Kernel stack disclosure via partially initialized RDS buffers

Published Jun 24, 2026 · Updated Jun 24, 2026

Information disclosure in Linux Kernel RDS allows local users to read kernel stack data through RDS_INFO_IB_CONNECTIONS. The RDS connection walkers copy each full result buffer to user space after down-state IB visitors leave multiple fields and an alignment hole uninitialized. Exploitation requires a kernel without CONFIG_INIT_STACK_ALL_ZERO, an RDMA-capable interface, and a non-up RDS connection; one result exposes 26 bytes that include kernel pointers.

CVSS severity5.5
Medium
EPSS probability0.12%
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 Linux Kernel RDS allows local users to read kernel stack data through RDS_INFO_IB_CONNECTIONS. The RDS connection walkers copy each full result buffer to user space after down-state IB visitors leave multiple fields and an alignment hole uninitialized. Exploitation requires a kernel without CONFIG_INIT_STACK_ALL_ZERO, an RDMA-capable interface, and a non-up RDS connection; one result exposes 26 bytes that include kernel pointers.

The record

CVE
CVE-2026-52995
Published
Jun 24, 2026
Updated
Jun 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1005
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 24, 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=2.6.30
  2. Affected versionversion=ec16227e14141e4fd7ae76354c09dadfe2449d9e <0797b2e6901827694aa9c34c4c72118c8c97fba1
  3. Affected versionversion=ec16227e14141e4fd7ae76354c09dadfe2449d9e <5e67cc262afb384e835c3327e9d954eeaedc6a87
  4. Affected versionversion=ec16227e14141e4fd7ae76354c09dadfe2449d9e <81651e9d7dea1c048d2952f57632a042931d7b43
  5. Affected versionversion=ec16227e14141e4fd7ae76354c09dadfe2449d9e <912ba2e5704fdb8bc5decda96dfc1a57838f0099
  6. Affected versionversion=ec16227e14141e4fd7ae76354c09dadfe2449d9e <91ce1bb6e4194dc2321748f68145359dcf86e350
  7. Affected versionversion=ec16227e14141e4fd7ae76354c09dadfe2449d9e <b6ba93a7b71ed443c9843eb12d27ed86f1e52694
  8. Affected versionversion=ec16227e14141e4fd7ae76354c09dadfe2449d9e <c7cb9eed8215a790f052f49cdccf577720d2bb62
  9. Affected versionversion=ec16227e14141e4fd7ae76354c09dadfe2449d9e <c88eb7e8d8397a8c1db59c425332c5a30b2a1682

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=2.6.30; version=ec16227e14141e4fd7ae76354c09dadfe2449d9e <0797b2e6901827694aa9c34c4c72118c8c97fba1; version=ec16227e14141e4fd7ae76354c09dadfe2449d9e <5e67cc262afb384e835c3327e9d954eeaedc6a87; version=ec16227e14141e4fd7ae76354c09dadfe2449d9e <81651e9d7dea1c048d2952f57632a042931d7b43; version=ec16227e14141e4fd7ae76354c09dadfe2449d9e <912ba2e5704fdb8bc5decda96dfc1a57838f0099; version=ec16227e14141e4fd7ae76354c09dadfe2449d9e <91ce1bb6e4194dc2321748f68145359dcf86e350; version=ec16227e14141e4fd7ae76354c09dadfe2449d9e <b6ba93a7b71ed443c9843eb12d27ed86f1e52694; version=ec16227e14141e4fd7ae76354c09dadfe2449d9e <c7cb9eed8215a790f052f49cdccf577720d2bb62; version=ec16227e14141e4fd7ae76354c09dadfe2449d9e <c88eb7e8d8397a8c1db59c425332c5a30b2a1682

Published CVSS scores

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

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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

T1005Data from Local System

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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