CVE-2026-53363

CVE Enrichment

CVSS: 9.8 CRITICAL
EPSS: 0.41%
EPSS Percentile: 35.11%
CISA KEV: Not listed

Description

In the Linux kernel, the following vulnerability has been resolved: xfrm: iptfs: preserve shared-frag marker in iptfs_consume_frags() iptfs_consume_frags() transfers paged fragments from one socket buffer to another but fails to propagate the SKBFL_SHARED_FRAG flag. This is the same class of bug that was fixed in skb_try_coalesce() for CVE-2026-46300: when fragments backed by read-only page-cache pages are merged, the marker indicating their shared nature must be preserved so that ESP can decide correctly whether in-place encryption is safe. Apply the same two-line fix used in skb_try_coalesce() to iptfs_consume_frags().

Technical Details

CVSS Version: 3.1
CNA / NVD Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published: 10-Jul-2026 19:17
Last Modified: 23-Jul-2026 02:07
EPSS Date: 2026-10-25

CVSS Vector


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

Affected Products / Versions

linux / linux_kernel
Version / affected range: * · from (inclusive) 6.14 · before (exclusive) 6.18.36
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: * · from (inclusive) 6.19 · before (exclusive) 7.0.13
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:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: 7.1
cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: 7.1
cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: 7.1
cpe:2.3:o:linux:linux_kernel:7.1:rc7:*:*:*:*:*:*

References

Last enrichment sync: 26-Oct-2026 01:04
Sources: NVD · FIRST EPSS · CISA KEV
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Reported Context (1)

IPTFS: CVE-2026-53363, CVE-2026-64566 Sysdig details six Linux flaws, including public root exploit for ZDI-CAN-33367

CVE (6)

People (4)

MITRE ATT&CK (2)

Vendors (3)

Products (9)

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.