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CVE Record

CVE-2022-49344: af_unix: Fix a data-race in unix_dgram_peer_wake_me().

In the Linux kernel, the following vulnerability has been resolved: af_unix: Fix a data-race in unix_dgram_peer_wake_me(). unix_dgram_poll() calls unix_dgram_peer_wake_me() without `other`'s lock held and check if its receive queue is full. Here we need to use unix_recvq_full_lockless() instead of unix_recvq_full(), otherwise KCSAN will report a data-race.

MediumCVSS 4.7Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2022-49344 is a Linux kernel race condition in AF_UNIX datagram socket handling. A local, low-privileged user may be able to cause high availability impact. The public record does not show confidentiality or integrity impact, and it is not listed as known exploited in the provided sources.

Executive priority

Handle through normal kernel patch management, with faster scheduling for shared Linux infrastructure. This is not a remote code execution issue in the provided evidence, but availability impact on multi-tenant systems can still create business disruption.

Technical view

The issue is a CWE-362 data race in unix_dgram_peer_wake_me(), where unix_dgram_poll() checks another socket's receive queue without holding that socket's lock. The fix changes the queue-full check to a lockless-safe helper. CVSS is 4.7: local access, high complexity, low privileges, no user interaction, availability impact only.

Likely exposure

Exposure is most relevant on Linux systems running affected kernel builds, especially multi-user hosts, container platforms, shared compute, and servers where untrusted local code can run. Exact exposure depends on distro backports and whether the AF_UNIX stable fixes are included.

Exploitation context

The source bundle does not indicate active exploitation, public weaponization, or CISA KEV listing. Exploitation requires local access, low privileges, and high attack complexity. Treat this primarily as a local denial-of-service risk until vendor-specific evidence says otherwise.

Researcher notes

The public description is narrow and kernel-specific. Validation should focus on whether downstream kernel packages include the stable commits, not only on upstream version labels. The affected-version data in the bundle is incomplete for distro-specific package decisions.

Mitigation direction

  • Update to a vendor-supported kernel containing the referenced AF_UNIX stable fixes.
  • Check Linux distribution advisories for backported fixes before relying on upstream version numbers.
  • Prioritize shared hosts, container platforms, and systems allowing untrusted local users.
  • Retire unsupported kernels that no longer receive stable security fixes.

Validation and detection

  • Inventory Linux kernel versions across servers, workstations, and container hosts.
  • Map installed kernel packages to distro advisories for CVE-2022-49344.
  • Confirm changelogs include the AF_UNIX unix_dgram_peer_wake_me() race fix.
  • Review whether untrusted local users or workloads can execute on exposed systems.
Prepared
Confidence
medium
Sources
9

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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cwe · low confidence lookup

CWE-362: Exact CWE lookup

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cve · low confidence lookup

CVE-2022-49344 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
4.7 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
3Timeline events
1ADP providers
8Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
4.7CVSS 3.1MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H13.6CISA-ADP

Vulnerability scoring details

Base CVSS 3.1 score

4.7Medium
CVSS 3.1 vector shape for CVE-2022-49344Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
cvssV3_1other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux7d267278a9ece963d77eefec61630223fce08c6c, 7d267278a9ece963d77eefec61630223fce08c6c, 7d267278a9ece963d77eefec61630223fce08c6c, 7d267278a9ece963d77eefec61630223fce08c6c, 7d267278a9ece963d77eefec61630223fce08c6c, 7d267278a9ece963d77eefec61630223fce08c6c, 7d267278a9ece963d77eefec61630223fce08c6c, 60bc010667ef06e0fb08d5ec599c0977adc2ac72, a3b0f6e8a21ef02f69a15abac440572d8cde8c2a, ec54d5ae9d298abf01c273233de9f2bc25d80475, da8db0830a2ce63f628150307a01a315f5081202, 9964b4c4ee925b2910723e509abd7241cff1ef84, 9d054f57adc981a5f503d5eb9b259aa450b90dc5, 72032798034d921ed565e3bf8dfdc3098f6473e2, 5c77e26862ce604edea05b3442ed765e9756fe0f, bad967fdd8ecbdd171f5f243657be033d2d081a7, 58a6a46a036ce81a2a8ecaa6fc1537c894349e3funaffected
LinuxLinux4.4, 0, 4.19.247, 5.4.198, 5.10.122, 5.15.47, 5.17.15, 5.18.4, 5.19affected
Weakness

CWE details

CWE-362

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-362 · source CWE mapping

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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