CVE-2026-64006netfilter: nf_tables: fix dst corruption in same register operation
- 5.5MediumCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 98% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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 ]
Timeline
ID reserved
By Linux
Published
- 3 months later
· 3 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.13% · top 98% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 567d746b55bc66d3800c9ae91d50f0c5deb2fd93 – < 95bf63844045e7948fd1aeb5e71b942e86ca0414
- affected 567d746b55bc66d3800c9ae91d50f0c5deb2fd93 – < b80ef316e978de2ef81d5bee9c19800b4cf96fb8
- affected 567d746b55bc66d3800c9ae91d50f0c5deb2fd93 – < 379ff8d40f59632bea1208956629c2a04067d403
- affected 567d746b55bc66d3800c9ae91d50f0c5deb2fd93 – < 96bea2a7baac4a1137c188dc7610184487ab30a7
- affected 567d746b55bc66d3800c9ae91d50f0c5deb2fd93 – < a391afe74398b70107f111aa731eab608624949d
- affected 567d746b55bc66d3800c9ae91d50f0c5deb2fd93 – < 18014147d3ee7831dce53fe65d7fc8d428b02552
- affected 5.6
- unaffected < 5.6
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.143 – ≤ 6.6.*
- unaffected 6.12.114 – ≤ 6.12.*
- unaffected 6.18.35 – ≤ 6.18.*
- unaffected 7.0.12 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References6
- https://git.kernel.org/stable/c/95bf63844045e7948fd1aeb5e71b942e86ca0414 (opens in a new tab)
- https://git.kernel.org/stable/c/b80ef316e978de2ef81d5bee9c19800b4cf96fb8 (opens in a new tab)
- https://git.kernel.org/stable/c/379ff8d40f59632bea1208956629c2a04067d403 (opens in a new tab)
- https://git.kernel.org/stable/c/96bea2a7baac4a1137c188dc7610184487ab30a7 (opens in a new tab)
- https://git.kernel.org/stable/c/a391afe74398b70107f111aa731eab608624949d (opens in a new tab)
- https://git.kernel.org/stable/c/18014147d3ee7831dce53fe65d7fc8d428b02552 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-45579 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-64006)Record last updated .