CVE-2026-23001

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-01-25. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.8Exploit: NoneExposed: 0

A fix is available — apply it.

In the Linux kernel, the following vulnerability has been resolved:

macvlan: fix possible UAF in macvlan_forward_source()

Add RCU protection on (struct macvlan_source_entry)->vlan.

Whenever macvlan_hash_del_source() is called, we must clear entry->vlan pointer before RCU grace period starts.

This allows macvlan_forward_source() to skip over entries queued for freeing.

Note that macvlan_dev are already RCU protected, as they are embedded in a standard netdev (netdev_priv(ndev)).

https: //lore.kernel.org/netdev/[email protected]/T/#u

CVSS v3
7.8
EG Score
7.8(medium)
EPSS
8.5%
KEV
Not listed

Published

January 25, 2026

Last Modified

June 16, 2026

References (7)

Vendor Advisories for CVE-2026-23001(14)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(31)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-6.8 (6.8.0-117.117) @ noble2026-06-08ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1054.57.1) @ noble2026-06-08ubuntu
ubuntulinux-tools-fips-6.8 (6.8.0-116.116+fips1) @ noble2026-06-08ubuntu
ubuntulinux-tools-gcp-edge (5.15.0.1106.115~20.04.1) @ focal2026-06-08ubuntu
ubuntulinux-tools-nvidia-tegra-rt-6.8 (6.8.0-1024.24) @ noble2026-06-08ubuntu
ubuntulinux-tools-nvidia-hwe-22.04-edge (6.8.0-1054.57~22.04.1) @ jammy2026-06-08ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1056.62) @ noble2026-06-08ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.176.161) @ jammy2026-06-08ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1059.65+fips1) @ noble2026-06-08ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1057.57~20.04.1) @ focal2026-06-08ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.176.186~20.04.1) @ focal2026-06-08ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1057.57) @ jammy2026-06-08ubuntu
ubuntulinux-tools-kvm-5.15 (5.15.0.1097.93) @ jammy2026-06-08ubuntu
ubuntulinux-tools-azure-fips-5.15 (5.15.0.1110.95) @ jammy2026-06-08ubuntu
ubuntulinux-tools-ibm-5.15 (5.15.0.1099.95) @ jammy2026-06-08ubuntu
ubuntulinux-tools-raspi-nolpae (5.15.0.1099.97) @ jammy2026-06-08ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1070 (5.15.0-1070.74) @ jammy2026-06-08ubuntu
ubuntulinux-tools-gcp-fips-5.15 (5.15.0.1105.95) @ jammy2026-06-08ubuntu
redhatkernel-0:6.12.0-55.70.1.el10_02026-04-27redhat
redhatkernel-0:5.14.0-70.175.1.el9_02026-04-22redhat
redhatkernel-rt-0:5.14.0-70.175.1.rt21.247.el9_02026-04-22redhat
redhatkernel-rt-0:5.14.0-284.164.1.rt14.449.el9_22026-04-08redhat
redhatkernel-0:5.14.0-284.164.1.el9_22026-04-08redhat
redhatkernel-0:4.18.0-477.135.1.el8_82026-04-08redhat
redhatkernel-0:5.14.0-427.117.1.el9_42026-04-01redhat
redhatkernel-0:5.14.0-570.100.1.el9_62026-03-23redhat
redhatkernel-0:4.18.0-553.111.1.el8_102026-03-09redhat
redhatkernel-0:5.14.0-611.38.1.el9_72026-03-09redhat
redhatkernel-0:6.12.0-124.43.1.el10_12026-03-09redhat
redhatkernel-rt-0:4.18.0-553.111.1.rt7.452.el8_102026-03-09redhat
linuxKernel @ 5.10.249—osv

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.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(13)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 12× in last 7d / 50× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

Showing the most recent 100 of 111 total refreshes for this CVE.

  1. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 16:57 UTCEPSS rescore
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  6. 2026-07-13 15:07 UTCOSV refresh
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  1. 2026-06-30 23:22 UTCEPSS rescore
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  8. 2026-06-25 13:49 UTCEPSS rescore
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  10. 2026-06-25 12:31 UTCOSV refresh
  11. 2026-06-24 14:05 UTCEPSS rescore
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  26. 2026-06-15 17:48 UTCEPSS rescore
  27. 2026-06-14 23:18 UTCEPSS rescore
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  36. 2026-06-08 03:05 UTCEG score recompute
  37. 2026-06-08 03:05 UTCVendor advisory
  38. 2026-06-08 03:05 UTCGHSA enrichment
  39. 2026-06-07 15:25 UTCEPSS rescore
  40. 2026-06-07 15:24 UTCEPSS rescore
  41. 2026-06-06 13:47 UTCEPSS rescore
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  50. 2026-06-02 20:13 UTCEPSS rescore
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  52. 2026-06-01 16:27 UTCOSV refresh
  53. 2026-06-01 13:51 UTCEPSS rescore
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Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-23001?
CVE-2026-23001 is a high vulnerability published on January 25, 2026. In the Linux kernel, the following vulnerability has been resolved: macvlan: fix possible UAF in macvlanforwardsource() Add RCU protection on (struct macvlansourceentry)->vlan. Whenever macvlanhashdel_source() is called, we must clear entry->vlan pointer before RCU grace period starts. This allows…
When was CVE-2026-23001 disclosed?
CVE-2026-23001 was first published in the National Vulnerability Database on January 25, 2026, with the most recent update on June 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-23001 actively exploited?
CVE-2026-23001 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 8.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-23001?
CVE-2026-23001 has a CVSS v4.0 base score of 7.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-23001?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-23001, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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