LiveActive security incident?Get immediate response
CVE Record

CVE-2024-46754: bpf: Remove tst_run from lwt_seg6local_prog_ops.

In the Linux kernel, the following vulnerability has been resolved: bpf: Remove tst_run from lwt_seg6local_prog_ops. The syzbot reported that the lwt_seg6 related BPF ops can be invoked via bpf_test_run() without without entering input_action_end_bpf() first. Martin KaFai Lau said that self test for BPF_PROG_TYPE_LWT_SEG6LOCAL probably didn't work since it was introduced in commit 04d4b274e2a ("ipv6: sr: Add seg6local action End.BPF"). The reason is that the per-CPU variable seg6_bpf_srh_states::srh is never assigned in the self test case but each BPF function expects it. Remove test_run for BPF_PROG_TYPE_LWT_SEG6LOCAL.

HighCVSS 7.8Not KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

A local Linux user may be able to trigger unsafe kernel behavior through a BPF test interface for IPv6 Segment Routing. The supplied CVSS assessment rates potential confidentiality, integrity, and availability impact as high. The kernel fix removes the unsupported test pathway.

Executive priority

Treat as a high-priority local privilege boundary risk, especially on shared or multi-user Linux hosts. Patch through normal emergency kernel processes after compatibility testing. It is less urgent than a remotely exploitable flaw on an internet-facing service, but potential system-wide impact justifies prompt remediation.

Technical view

bpf_test_run() could invoke BPF_PROG_TYPE_LWT_SEG6LOCAL operations without first entering input_action_end_bpf(). Consequently, the per-CPU seg6_bpf_srh_states::srh value was not initialized although related BPF functions expected it. The stable-kernel remediation removes test_run from lwt_seg6local_prog_ops.

Likely exposure

Exposure is local, requires low privileges according to CVSS, and concerns Linux systems containing the affected LWT_SEG6LOCAL BPF test operation. The bundle names Linux 4.18, 6.10.10, and 6.11, but does not provide sufficiently clear downstream distribution package ranges. Confirm applicability with each Linux vendor.

Exploitation context

The supplied sources do not report active exploitation, and the CVE is not identified as a CISA KEV entry. The CVSS vector describes a local, low-complexity attack requiring low privileges and no user interaction. No public exploit evidence is included.

Researcher notes

The reported defect is an invalid test execution path rather than a working LWT_SEG6LOCAL self-test. The bundle provides no CWE, crash details, exploit proof, or precise distribution mapping. Researchers should use the two stable-kernel commits and vendor backport records to establish affected code ancestry without assuming upstream version labels match packaged kernels.

Mitigation direction

  • Apply a vendor-supported kernel update containing the referenced stable-kernel fix.
  • Check distribution advisories for exact package versions and backport status.
  • Prioritize multi-user systems where local users can access relevant BPF functionality.
  • Use vendor guidance for temporary restrictions if immediate kernel updating is unavailable.

Validation and detection

  • Record running kernel and installed package versions across Linux assets.
  • Check vendor changelogs for CVE-2024-46754 or either referenced fix commit.
  • Confirm updated kernels are active after reboot, not merely installed.
  • Review local BPF access controls while avoiding disruptive production testing.
Prepared
Confidence
medium
Sources
4

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

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cve · low confidence lookup

CVE-2024-46754 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
High
CVSS
7.8 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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
3Source 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
7.8CVSS 3.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9Linux

Vulnerability scoring details

Base CVSS 3.1 score

7.8High
CVSS 3.1 vector shape for CVE-2024-46754Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux004d4b274e2a1a895a0e5dc66158b90a7d463d44, 004d4b274e2a1a895a0e5dc66158b90a7d463d44unaffected
LinuxLinux4.18, 0, 6.10.10, 6.11affected
Weakness

CWE details

No CWE listed

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