“—” beside the score: it is equal to NVD's CVSS score.
This medium-severity CVE scores 5.5 under NVD CVSS v3. EPSS exploit probability: 0.1% (1st percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.
A fix is available — apply it.
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: 6lowpan: check skb_clone() return value in send_mcast_pkt()
The skb_clone() function can return NULL if memory allocation fails. send_mcast_pkt() calls skb_clone() without checking the return value, which can lead to a NULL pointer dereference in send_pkt() when it dereferences skb->data. Add a NULL check after skb_clone() and skip the peer if the clone fails.
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines.
Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.
In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
July 19, 2026
October 7, 2026
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| ubuntu | linux-tools-nvidia-hwe-26.04 (7.0.0-2016.16) @ resolute | 2026-10-07 | ubuntu |
| ubuntu | linux-tools-azure-edge (7.0.0-1014.14~24.04.1) @ noble | 2026-10-07 | ubuntu |
| ubuntu | linux-tools-oracle-edge (7.0.0-1011.11~24.04.1) @ noble | 2026-10-07 | ubuntu |
| ubuntu | linux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute | 2026-10-07 | ubuntu |
| ubuntu | linux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute | 2026-10-07 | ubuntu |
| ubuntu | linux-tools-gcp-edge (5.15.0.1118.128~20.04.1) @ focal | 2026-10-07 | ubuntu |
| ubuntu | linux-tools-gcp-lts-22.04 (5.15.0.1118.115) @ jammy | 2026-10-07 | ubuntu |
| ubuntu | linux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute | 2026-10-07 | ubuntu |
| ubuntu | linux-tools-nvidia-hwe-24.04-edge (7.0.0-1016.16) @ resolute | 2026-10-07 | ubuntu |
| ubuntu | linux-tools-gcp-edge (7.0.0-1011.11~24.04.1) @ noble | 2026-10-07 | ubuntu |
| ubuntu | linux-tools-oracle-edge (5.15.0.1114.120~20.04.1) @ focal | 2026-10-07 | ubuntu |
| ubuntu | linux-xilinx-zynqmp-tools-5.15.0-1080 (5.15.0-1080.84) @ jammy | 2026-10-07 | ubuntu |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| linux | 5.10.103-1 ... 5.10.92-2 (54 versions) |
| — |
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| linux | 6.1.106-1 ... 6.1.99-1 (53 versions) |
| — |
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| linux | 6.12.38-1 ... 6.12.94-1~bpo12+1 (27 versions) |
| — |
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| linux | 6.12.100-1 ... 7.0.9-1~bpo13+1 (142 versions) |
| — |
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.
Linux kernel vulnerabilities
Linux kernel (Azure) vulnerabilities
Linux kernel vulnerabilities
Linux kernel (NVIDIA) vulnerabilities
Linux kernel (NVIDIA BaseOS) vulnerabilities
Linux kernel (GCP) vulnerabilities
Linux kernel (Azure) vulnerabilities
Linux kernel (Oracle) vulnerabilities
Linux kernel vulnerabilities
Linux kernel (GCP) vulnerabilities
Linux kernel (GCP) vulnerabilities
Linux kernel (Oracle) vulnerabilities
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 99 of 128 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 29 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
ubuntu:USN-8728-1 · ubuntu:USN-8618-1
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-63991
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.