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CVE Record

CVE-2025-38607: bpf: handle jset (if a & b ...) as a jump in CFG computation

In the Linux kernel, the following vulnerability has been resolved: bpf: handle jset (if a & b ...) as a jump in CFG computation BPF_JSET is a conditional jump and currently verifier.c:can_jump() does not know about that. This can lead to incorrect live registers and SCC computation. E.g. in the following example: 1: r0 = 1; 2: r2 = 2; 3: if r1 & 0x7 goto +1; 4: exit; 5: r0 = r2; 6: exit; W/o this fix insn_successors(3) will return only (4), a jump to (5) would be missed and r2 won't be marked as alive at (3).

HighCVSS 7.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

A Linux kernel BPF verifier error can misread a conditional branch, producing an incorrect view of which registers remain live. The supplied CVSS assessment indicates that a local attacker with low privileges could potentially compromise confidentiality, integrity, and availability. Exposure depends on the running kernel and whether the affected BPF verifier path is reachable.

Executive priority

Treat as a high-priority kernel maintenance issue, especially on multi-user, development, hosting, or untrusted-workload systems. It is not evidenced as an internet-scale emergency, but the stated potential impact spans data confidentiality, system integrity, and availability. Schedule prompt tested patching through normal kernel-update procedures.

Technical view

The verifier’s control-flow graph logic did not treat BPF_JSET as a conditional jump. Consequently, successor analysis could omit the taken branch, corrupting live-register and strongly connected component calculations. The Linux kernel project resolved the flaw through the referenced stable commits.

Likely exposure

The bundle identifies Linux versions 6.15, 6.15.10, 6.16.1, and 6.17 as affected; it also contains an ambiguous “0” entry. Confirm exact exposure through distribution advisories and fix backport records rather than version numbers alone. The CVSS vector describes a local, low-privilege attack requiring no user interaction.

Exploitation context

The bundle does not establish active exploitation, and the CVE is not listed as KEV. No public exploit evidence is supplied. The CVSS vector indicates local access and low privileges, so this is primarily a post-access privilege-boundary risk rather than a directly remote entry point.

Researcher notes

The security consequence arises from incomplete CFG successor enumeration for BPF_JSET. Missing the taken edge can distort liveness and SCC computation in the verifier. The supplied material does not demonstrate a reliable exploitation chain, identify a CWE, or map each fix commit to specific release branches; downstream backport verification is therefore essential.

Mitigation direction

  • Install a vendor kernel update containing the applicable referenced stable fix.
  • Consult distribution guidance to identify patched package versions and backports.
  • Reboot affected systems into the updated kernel after deployment.
  • Prioritize shared or untrusted-workload systems where local users may exercise BPF functionality.

Validation and detection

  • Inventory active kernel versions, not merely installed kernel packages.
  • Confirm the running kernel includes the applicable stable fix or vendor backport.
  • Verify systems restarted successfully into the remediated kernel.
  • Review vendor advisories for affected-version interpretations and package-specific status.
Prepared
Confidence
medium
Sources
5

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.

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CVE-2025-38607 mapping review

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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
0ADP providers
4Source links

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-2025-38607Attack 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.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux14c8552db64476ffc27c13dc6652fc0dac31c0ba, 14c8552db64476ffc27c13dc6652fc0dac31c0ba, 14c8552db64476ffc27c13dc6652fc0dac31c0baunaffected
LinuxLinux6.15, 0, 6.15.10, 6.16.1, 6.17affected
Weakness

CWE details

No CWE listed

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