Security readout for executives and security teams
Plain-English summary
An error path in Linux’s HNS RoCE RDMA driver can remove a queue pair without required locks, risking kernel memory corruption. The severity model assumes a local, low-privileged attacker and potential confidentiality, integrity, and availability impact. Practical exploitation is not established. Risk is concentrated on affected kernels using this driver.
Executive priority
Prioritize remediation on multi-user, compute, or infrastructure systems actively using HNS RoCE/RDMA. The potential kernel-memory impact is serious, but the local-access requirement and absence of documented exploitation reduce emergency internet-edge urgency. Handle through an expedited kernel maintenance cycle after confirming exposure.
Technical view
In hns_roce_create_qp_common(), error unwinding calls hns_roce_qp_remove() without locks required by that function. Concurrent state changes may corrupt kernel memory. The fix acquires the same locks used by other callers. CVSS 3.1 is 7.8: local access, low complexity, low privileges, and no user interaction. Exact triggering conditions are not supplied.
Likely exposure
Likely exposure is limited to affected Linux kernels where HNS RoCE/RDMA is present and the vulnerable queue-pair creation error path is reachable. The supplied version data spans Linux 4.17 through 7.1 but includes an unexplained “0” and ambiguous entries. Confirm distribution-specific exposure and backports rather than relying solely on version strings.
Exploitation context
The bundle marks KEV false and contains no cited evidence of active exploitation or a public proof of concept. The CVSS vector indicates local rather than network access. Whether the error path can be triggered reliably and whether memory corruption can be converted into controlled security impact are not established by the supplied evidence.
Researcher notes
The defect is an unlocked hns_roce_qp_remove() call during hns_roce_create_qp_common() error unwinding. The correction mirrors locking used by two other callers. No CWE is assigned. The source bundle does not describe the race window, trigger prerequisites, observed crashes, exploit reliability, or distribution backport status, limiting deeper exploitability assessment.
Mitigation direction
- Inventory affected Linux systems where HNS RoCE/RDMA is configured or active.
- Install a vendor-supported kernel containing the applicable referenced stable fix for that branch.
- If patching is delayed, consult the distribution vendor; the sources name no tested interim mitigation.
- Reduce untrusted local access on exposed systems until remediation is complete.
Validation and detection
- Record running kernel versions and map vendor builds to upstream fix commits or documented backports.
- Confirm whether the hns_roce driver and relevant RDMA hardware are present, configured, or active.
- After updating, verify the remediated kernel is booted and the vulnerable code is patched.
- Run approved RDMA regression tests covering queue-pair creation and error handling.
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
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CVE-2026-46112 mapping review
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Open ATT&CK lookup- 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
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.
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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9LinuxVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:L/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.
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/1f0a3aa8b569d010316b427238222c5d899f9618CVE reference, Linux
- https://git.kernel.org/stable/c/b6296ff2475fc95ee6ea1b528c4b385302808186CVE reference, Linux
- https://git.kernel.org/stable/c/fb4ae739811d467409bd07d0e36cfd4140f3d26aCVE reference, Linux
- https://git.kernel.org/stable/c/fcf6a832c0d5b2bc5398d6996c5570d3ee7993fbCVE reference, Linux
- https://git.kernel.org/stable/c/1912f78798505dc9c637081bbddfbf1c22494c49CVE reference, Linux
- https://git.kernel.org/stable/c/615d9d260c32bb678504ca96f29ae46f9d745155CVE reference, Linux
- https://git.kernel.org/stable/c/0c99acbc8b6c6dd526ae475a48ee1897b61072fbCVE 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.