Security readout for executives and security teams
Plain-English summary
CVE-2026-64077 is a Linux kernel ebtables/netfilter flaw with high severity. The issue is local, meaning an attacker generally needs some access to the system first, but successful exploitation could compromise confidentiality, integrity, and availability. The public bundle does not show active exploitation or a named distro patch level.
Executive priority
Patch on the next urgent kernel maintenance cycle, faster for shared or multi-tenant Linux systems. The business risk is not broad remote compromise from the supplied evidence, but local compromise of a vulnerable host could still be severe.
Technical view
The fix changes ebtables removal handling to a two-stage scheme and moves table->ops assignment under the ebt mutex. The stated goal is to avoid exposing a partially filled ebt_table structure. CVSS 3.1 is 7.8 with local attack vector, low complexity, low privileges, no user interaction, and high CIA impact.
Likely exposure
Linux systems running affected kernel builds with ebtables/netfilter support are the relevant exposure. Risk is higher on multi-user servers, shared hosting, CI runners, and container hosts where untrusted or low-privileged local code may run. The bundle’s affected version details are incomplete and should be confirmed against vendor advisories.
Exploitation context
The provided sources support local, low-privilege exploitation potential by CVSS, but do not provide exploit details. KEV is false, and no cited source in the bundle reports active exploitation. Treat this as a serious local privilege-impact kernel issue, not as confirmed internet-wide remote exploitation.
Researcher notes
Public detail is limited to the kernel resolution text and stable commit references. The affected-version data in the bundle appears inconsistent, so avoid overclaiming exact ranges. Analysis should center on ebtables table lifecycle locking, partial structure exposure, and whether downstream kernels have backported the stable commits.
Mitigation direction
- Apply a vendor kernel update that includes the referenced stable fixes.
- Prioritize shared systems where untrusted local users or workloads run.
- Restrict unnecessary local shell, build, and container access until patched.
- Check Linux distribution advisories for exact fixed package versions.
- Monitor CISA KEV and vendor advisories for exploitation status changes.
Validation and detection
- Inventory Linux kernel versions across servers, images, and container hosts.
- Check package changelogs for CVE-2026-64077 or the referenced commits.
- Confirm whether ebtables/netfilter support is present or loaded.
- Map systems with untrusted local users or workloads for priority.
- Reboot after kernel updates and verify the active running kernel.
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.
CVE-2026-64077 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
- 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/739d5dac7b2da44a756aa4d758ee3f1ccf5a27f1CVE reference, Linux
- https://git.kernel.org/stable/c/ef395579a7631a06d61969fc712eb80402231b89CVE reference, Linux
- https://git.kernel.org/stable/c/b7f0544d86d439cb946515d2ef6a0a75e8626710CVE 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.