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CVE Record

CVE-2023-52887: net: can: j1939: enhanced error handling for tightly received RTS messages in xtp_rx_rts_session_new

In the Linux kernel, the following vulnerability has been resolved: net: can: j1939: enhanced error handling for tightly received RTS messages in xtp_rx_rts_session_new This patch enhances error handling in scenarios with RTS (Request to Send) messages arriving closely. It replaces the less informative WARN_ON_ONCE backtraces with a new error handling method. This provides clearer error messages and allows for the early termination of problematic sessions. Previously, sessions were only released at the end of j1939_xtp_rx_rts(). Potentially this could be reproduced with something like: testj1939 -r vcan0:0x80 & while true; do # send first RTS cansend vcan0 18EC8090#1014000303002301; # send second RTS cansend vcan0 18EC8090#1014000303002301; # send abort cansend vcan0 18EC8090#ff00000000002301; done

HighCVSS 7.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2023-52887 is a Linux kernel flaw in the CAN J1939 networking code. Specially timed Request-To-Send messages can cause problematic session handling and availability impact. This matters mainly for systems that use Linux CAN/J1939, common in automotive, industrial, or embedded environments.

Executive priority

Prioritize patching for embedded, vehicle, industrial, or lab systems using Linux CAN/J1939. For standard IT servers without CAN usage, urgency is lower but still track through normal kernel update cycles.

Technical view

The issue is in net/can/j1939 xtp_rx_rts_session_new handling of tightly received RTS messages. The kernel fix replaces WARN_ON_ONCE backtraces with clearer error handling and earlier termination of problematic sessions. CVSS is 7.5, reflecting high availability impact with no confidentiality or integrity impact stated.

Likely exposure

Exposure is likely limited to Linux systems with CAN J1939 functionality enabled or reachable. General-purpose servers not using CAN/J1939 are less likely exposed, but embedded Linux and operational technology environments should verify kernel configuration and deployed versions.

Exploitation context

The CVE record includes a potential reproduction scenario using crafted CAN J1939 traffic, but CISA KEV is false and no supplied source states active exploitation. Treat this as a denial-of-service risk where attackers can reach the relevant CAN interface.

Researcher notes

Source evidence supports an availability-focused kernel bug fixed by stable commits. The provided record does not identify data exposure, privilege escalation, or confirmed exploitation. Affected-version detail is kernel-branch specific, so rely on vendor backport status rather than version strings alone.

Mitigation direction

  • Apply Linux stable kernel updates containing the referenced fixes.
  • Use distribution security updates where available, including Debian LTS guidance if applicable.
  • If unsure, check your vendor kernel advisory for CVE-2023-52887 applicability.

Validation and detection

  • Inventory Linux systems using CAN or J1939 networking.
  • Compare running kernel versions against vendor fixed packages or stable commits.
  • Review distribution advisories for whether your kernel build includes the fix.
  • Check logs for related kernel warnings or J1939 session errors.
Prepared
Confidence
high
Sources
10

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-2023-52887 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.5 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/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
2ADP providers
9Source 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
7.5CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6Linux

Vulnerability scoring details

Base CVSS 3.1 score

7.5High
CVSS 3.1 vector shape for CVE-2023-52887Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/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

CVECVE Program Container
CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux9d71dd0c70099914fcd063135da3c580865e924c, 9d71dd0c70099914fcd063135da3c580865e924c, 9d71dd0c70099914fcd063135da3c580865e924c, 9d71dd0c70099914fcd063135da3c580865e924c, 9d71dd0c70099914fcd063135da3c580865e924c, 9d71dd0c70099914fcd063135da3c580865e924c, 9d71dd0c70099914fcd063135da3c580865e924cunaffected
LinuxLinux5.4, 0, 5.4.279, 5.10.221, 5.15.162, 6.1.97, 6.6.37, 6.9.8, 6.10affected
Weakness

CWE details

No CWE listed

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