CVE-2026-46101: Linux vulnerability

CVE-2026-46101: netfilter: reject zero shift in nft_bitwise

In the Linux kernel, the following vulnerability has been resolved: netfilter: reject zero shift in nft_bitwise Reject zero shift operands for nft_bitwise left and right shift expressions during initialization. The carry propagation logic computes the carry from the adjacent 32-bit word using BITS_PER_TYPE(u32) - shift. A zero shift operand turns this into a 32-bit shift, which is undefined behaviour. Reject zero shift operands in the control plane, alongside the existing check for values greater than or equal to 32, so malformed rules never reach the packet path.

UnknownCVSS not scoredNot KEV-listedUpdatedOct 15, 2026, 01:20 UTC (UTC+00:00)

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: May 27, 2026, 12:59 UTC (UTC+00:00)

Official CVE source material

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.

0CVSS vectors

3Timeline events

1ADP providers

12Source links

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.
May 13, 2026, 15:03 UTC (UTC+00:00)
CVE publishedCVE Program
The CVE record was published.
May 27, 2026, 12:59 UTC (UTC+00:00)
CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
Oct 15, 2026, 01:20 UTC (UTC+00:00)

ADP provider summaries

Source materials

CVE List V5 sourceCVE List V5
https://git.kernel.org/stable/c/9baa08d6b6b096fad70049533f0d705d85fdc979CVE reference, Linux
https://git.kernel.org/stable/c/4fccea585631621c975883911a08d15b6671f7dcCVE reference, Linux
https://git.kernel.org/stable/c/9ad26c272405f53834871cc2e46b9b5393a666c3CVE reference, Linux
https://git.kernel.org/stable/c/bffef0acec9c3b837a785248a893137fb7f26c95CVE reference, Linux
https://git.kernel.org/stable/c/ca24f1243ad1a4d12d6a23876bbbe3ed02099853CVE reference, Linux
https://git.kernel.org/stable/c/6f820139d16a4c9865a145d4a9cf9c92cc632c14CVE reference, Linux
https://git.kernel.org/stable/c/f370205974f171a5868c13ff30d7642fed46e47bCVE reference, Linux
https://git.kernel.org/stable/c/fe11e5c40817b84abaa5d83bfb6586d8412bfd07CVE reference, Linux
https://cert-portal.siemens.com/productcert/html/ssa-019113.htmlCVE reference, siemens-SADP
https://cert-portal.siemens.com/productcert/html/ssa-457936.htmlCVE reference, siemens-SADP
https://cert-portal.siemens.com/productcert/html/ssa-784472.htmlCVE reference, siemens-SADP

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

LinuxLinux567d746b55bc66d3800c9ae91d50f0c5deb2fd93, 567d746b55bc66d3800c9ae91d50f0c5deb2fd93, 567d746b55bc66d3800c9ae91d50f0c5deb2fd93, 567d746b55bc66d3800c9ae91d50f0c5deb2fd93, 567d746b55bc66d3800c9ae91d50f0c5deb2fd93, 567d746b55bc66d3800c9ae91d50f0c5deb2fd93, 567d746b55bc66d3800c9ae91d50f0c5deb2fd93, 567d746b55bc66d3800c9ae91d50f0c5deb2fd93unaffected

LinuxLinux5.6, 0, 5.10.258, 5.15.209, 6.1.175, 6.6.140, 6.12.86, 6.18.27, 7.0.4, 7.1affected

Weakness

CWE details

No CWE listed

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