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Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-64006

Linux Linux — netfilter: nf_tables: fix dst corruption in same register operation
  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   L   L   N  U  N  N  H    5.5   .0013    2.0     —
AFFECTED
  Product  Versions                                    Fixed
  Linux    567d746b55bc66d3800c9ae91d50f0c5deb2fd93 –  —
  Linux    5.6 –                                       6.6.143
TIMELINE
  Jul 19  Reserved by Linux
  Jul 19  Published (CNA: Linux)
  Oct 13  ENRICHED — CVE-2026-64006 (Linux). Received CVSS 5.5 and CPE data from NVD.
CWE-682 · CNA: Linux · CVSS v3.1 · 4 references · NVD status: Analyzed

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: fix dst corruption in same register operation For lshift and rshift, the shift operations are performed in a loop over 32-bit words. The loop calculates the shifted value and write it to dst, and then immediately reads from src to calculate the carry for the next iteration. Because src and dst could point to the same memory location, the carry is incorrectly calculated using the newly modified dst value instead of the original src value. Adding a temporary local variable to cache the original value before writing to dst and using it for the carry calculation solves the problem. In addition, partial overlap is rejected from control plane for all kind of operations including byteorder. This was tested with the following bytecode: table test_table ip flags 0 use 1 handle 1 ip test_table test_chain use 3 type filter hook input prio 0 policy accept packets 0 bytes 0 flags 1 ip test_table test_chain 2 [ immediate reg 1 0x44332211 0x88776655 ] [ bitwise reg 1 = ( reg 1 << 0x08000000 ) ] [ cmp eq reg 1 0x66443322 0x00887766 ] [ counter pkts 0 bytes 0 ] ip test_table test_chain 4 3 [ immediate reg 1 0x44332211 0x88776655 ] [ bitwise reg 1 = ( reg 1 << 0x08000000 ) ] [ cmp eq reg 1 0x55443322 0x00887766 ] [ counter pkts 21794 bytes 1917798 ]

Lifecycle

Complete event history — 3 events, chronological
DateEventDetail
July 19, 2026ReservedReserved by Linux
July 19, 2026PublishedPublished (CNA: Linux)
October 13, 2026ENRICHEDENRICHED — CVE-2026-64006 (Linux). Received CVSS 5.5 and CPE data from NVD.

Affected

Affected products and packages — 2 rows
VendorProduct / PackageEcosystemVersion introducedFixed
LinuxLinux—567d746b55bc66d3800c9ae91d50f0c5deb2fd93—
LinuxLinux—5.66.6.143

Weaknesses

CWE-682

References (4)

Related

Authoritative record: CVE-2026-64006 at cve.org

Vendors: linux

Weaknesses: CWE-682

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-64006 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.