Security readout for executives and security teams
Plain-English summary
CVE-2024-58087 is a Linux kernel ksmbd flaw involving unsafe session handling during lookup and expiration. A network attacker needs no credentials, but exploitation is rated high complexity. If reachable ksmbd service is affected, impact can include loss of confidentiality, integrity, and availability.
Executive priority
Treat this as high priority for any Linux-hosted SMB service exposed beyond trusted internal networks. Risk is lower where ksmbd is not enabled or SMB is tightly restricted, but patch planning should still follow normal kernel maintenance urgency.
Technical view
The issue is a race condition in ksmbd session lookup and expiration. The kernel fix increments the session reference count while holding the relevant lock, addressing CWE-667 improper locking. CVSS 3.1 is 8.1: network attack vector, high complexity, no privileges, no user interaction, and high CIA impact.
Likely exposure
Exposure is most relevant to Linux systems using ksmbd for SMB service, especially where SMB is reachable over untrusted networks. Exact exposure depends on kernel branch, distro backports, and whether ksmbd is enabled.
Exploitation context
The provided bundle does not show CISA KEV listing or confirmed active exploitation. ZDI published an advisory, but the supplied evidence should not be treated as proof of in-the-wild exploitation.
Researcher notes
The core evidence identifies a locking race in ksmbd session reference handling. The bundle does not provide exploit details, affected distro package names, or a vendor mitigation beyond stable kernel fixes, so validation should focus on enabled ksmbd service and distro-specific patch status.
Mitigation direction
- Update to vendor kernel packages containing the referenced stable ksmbd fixes.
- Check Linux distribution advisories for exact fixed package versions and backports.
- Disable ksmbd where SMB service is not required.
- Restrict SMB exposure to trusted networks until patched.
- Prioritize internet-facing or partner-facing SMB hosts for remediation.
Validation and detection
- Inventory Linux hosts running ksmbd or kernel SMB server functionality.
- Map kernel versions against vendor advisories and the referenced stable commits.
- Confirm whether SMB ports are exposed to untrusted networks.
- Verify patched hosts are running the updated kernel after reboot.
- Review logs for abnormal ksmbd crashes or SMB session instability.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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.
CWE-667: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2024-58087 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
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.
SSVC decision data
CVSS vector scores
1 official scoreWe 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.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H2.25.9CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
8.1HighVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/2107ab40629aeabbec369cf34b8cf0f288c3eb1bCVE reference, Linux
- https://git.kernel.org/stable/c/37a0e2b362b3150317fb6e2139de67b1e29ae5ffCVE reference, Linux
- https://git.kernel.org/stable/c/450a844c045ff0895d41b05a1cbe8febd1acfcfdCVE reference, Linux
- https://git.kernel.org/stable/c/a39e31e22a535d47b14656a7d6a893c7f6cf758cCVE reference, Linux
- https://git.kernel.org/stable/c/b95629435b84b9ecc0c765995204a4d8a913ed52CVE reference, Linux
- https://www.zerodayinitiative.com/advisories/ZDI-25-100/CVE reference, Linux
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Locking
Improper Locking represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.