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CVE Record

CVE-2023-53782: dccp: Fix out of bounds access in DCCP error handler

In the Linux kernel, the following vulnerability has been resolved: dccp: Fix out of bounds access in DCCP error handler There was a previous attempt to fix an out-of-bounds access in the DCCP error handlers, but that fix assumed that the error handlers only want to access the first 8 bytes of the DCCP header. Actually, they also look at the DCCP sequence number, which is stored beyond 8 bytes, so an explicit pskb_may_pull() is required.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This is a Linux kernel memory-safety issue in DCCP network error handling. The kernel could read beyond the expected DCCP header because prior handling did not ensure enough packet data was present. Business urgency depends on whether affected Linux kernels and DCCP exposure exist in the environment.

Executive priority

Treat this as a targeted kernel maintenance item, not an emergency based on current evidence. Prioritize patch validation for Linux fleets, especially systems with network protocol exposure, while monitoring vendor advisories for severity updates.

Technical view

CVE-2023-53782 fixes an out-of-bounds access in Linux DCCP error handlers. The earlier fix assumed handlers only needed the first 8 DCCP header bytes, but they also inspect the DCCP sequence number beyond that range, requiring an explicit pskb_may_pull().

Likely exposure

Exposure is limited to Linux systems running affected kernel versions listed in the CVE record, especially where DCCP functionality is present. The provided sources do not identify specific distributions, appliances, default configurations, or exposed services.

Exploitation context

CISA KEV status is false in the bundle, and no cited source reports active exploitation. The bundle provides no public exploit status, CVSS score, CWE, or confirmed impact beyond the out-of-bounds kernel access.

Researcher notes

The key technical detail is incomplete packet linearization before reading the DCCP sequence number in error handling. The source bundle names multiple stable commits but does not provide CVSS, exploitability analysis, or distribution mapping.

Mitigation direction

  • Update affected Linux kernels to vendor or stable releases containing the referenced fixes.
  • Check your Linux distribution advisories for backported fixes and package-specific status.
  • Prioritize systems where DCCP support or DCCP traffic exposure is known.
  • If immediate patching is delayed, follow vendor guidance for temporary risk reduction.

Validation and detection

  • Inventory Linux kernel versions and compare them with the affected ranges in the CVE record.
  • Confirm whether the running kernel package includes the relevant stable fix for its branch.
  • Review distribution security advisories for CVE-2023-53782 applicability and fixed package versions.
  • Document whether DCCP is enabled, loaded, or reachable in production environments.
Prepared
Confidence
medium
Sources
11

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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CVE-2023-53782 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
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.

0CVSS vectors
3Timeline events
0ADP providers
10Source links

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.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux6706a97fec963d6cb3f7fc2978ec1427b4651214, 6706a97fec963d6cb3f7fc2978ec1427b4651214, 6706a97fec963d6cb3f7fc2978ec1427b4651214, 6706a97fec963d6cb3f7fc2978ec1427b4651214, 6706a97fec963d6cb3f7fc2978ec1427b4651214, 6706a97fec963d6cb3f7fc2978ec1427b4651214, 6706a97fec963d6cb3f7fc2978ec1427b4651214, 6706a97fec963d6cb3f7fc2978ec1427b4651214, 6706a97fec963d6cb3f7fc2978ec1427b4651214, 96106a207ae972d8f9e4815e84c159f29e4bbee7, 261def571d19d3b4e2228643c5c0ac89f5e10d15, dbf1719c65fb0368a94d15767c669e47e295a073, 46b1ffd4738a3ee04b2e8f5a4b8cfc39e9c722a2, a2df29ed840f90e459a3f8ff029b216be3912731, ba93cf7d2118774c0b2dcfccc8ae999427815caa, 4ca7e66fcce02459fa6961979f9fe30ae1098cf0, bd380617d5d161ea2bbe7a8073b3ca7bca0381e5, bfe7d1dee859cad6802f8e21a0a863f408114612, 968953df833c61fce5adcc0612efeaced24e5719, 99131760a8851e6e5b2c9b24d0a68a3068923a08, 84d9c612bb7a9e44c6bf286bedfbe72a6d2d71d4, 3.2.87, 3.10.105, 3.12.68, 3.16.42, 4.4.34, 4.8.10unaffected
LinuxLinux4.9, 0, 4.14.326, 4.19.295, 5.4.257, 5.10.195, 5.15.132, 6.1.53, 6.4.16, 6.5.3, 6.6affected
Weakness

CWE details

No CWE listed

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