CVE-2026-46300

CVE Enrichment

CVSS: 7.8 HIGH
EPSS: 2.43%
EPSS Percentile: 83.76%
CISA KEV: Not listed

Description

In the Linux kernel, the following vulnerability has been resolved: net: skbuff: preserve shared-frag marker during coalescing skb_try_coalesce() can attach paged frags from @from to @to. If @from has SKBFL_SHARED_FRAG set, the resulting @to skb can contain the same externally-owned or page-cache-backed frags, but the shared-frag marker is currently lost. That breaks the invariant relied on by later in-place writers. In particular, ESP input checks skb_has_shared_frag() before deciding whether an uncloned nonlinear skb can skip skb_cow_data(). If TCP receive coalescing has moved shared frags into an unmarked skb, ESP can see skb_has_shared_frag() as false and decrypt in place over page-cache backed frags. Propagate SKBFL_SHARED_FRAG when skb_try_coalesce() transfers paged frags. The tailroom copy path does not need the marker because it copies bytes into @to's linear data rather than transferring frag descriptors.

Technical Details

CVSS Version: 3.1
CNA / NVD Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published: 23-May-2026 19:17
Last Modified: 08-Sep-2026 16:18
EPSS Date: 2026-10-11
CWE: CWE-787, CWE-123

CVSS Vector


            CVSS:3.1                            AV:L /
                            AC:L /
                            PR:L /
                            UI:N /
                            S:U /
                            C:H /
                            I:H /
                            A:H

Affected Products / Versions

linux / linux_kernel
Version / affected range: * · from (inclusive) 3.9 · through (inclusive) 5.10.257
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: * · from (inclusive) 5.11 · before (exclusive) 5.15.208
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: * · from (inclusive) 5.16 · before (exclusive) 6.1.174
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: * · from (inclusive) 6.2 · before (exclusive) 6.6.141
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: * · from (inclusive) 6.7 · before (exclusive) 6.12.91
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: * · from (inclusive) 6.13 · before (exclusive) 6.18.33
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: * · from (inclusive) 6.19 · before (exclusive) 7.0.10
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: 7.1
cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: 7.1
cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: 7.1
cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: 7.1
cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*

References

Last enrichment sync: 12-Oct-2026 01:12
Sources: NVD · FIRST EPSS · CISA KEV
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Reported Context (1)

CVE-2026-46300 (Fragnesia): a local privilege escalation vulnerability in the Linux kernel related to packet fragment handling and the page cache mechanism. Kaspersky Reports Rising Vulnerability Disclosures and Early Exploit Releases in Q2 2026

CVE (26)

People (2)

Vendors (2)

Products (15)

Tools (4)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.