TI-2026-38449 Aliases CVE-2026-53363 GHSA-7xf9-r6gc-x4cm

xfrm: iptfs: preserve shared-frag marker in iptfs_consume_frags()

MEDIUM 42Published 2026-07-10 · Updated 2026-08-05

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

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().

Why it matters now

EPSS 0.00411 35th percentileScored 2026-11-07

Fix Fixed Linux (Linux): 6.18.36, 7.0.13, 7.1

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Linux	Linux	6.14 and later	6.18.36, 7.0.13, 7.1	Patch available	CNA

Linux VendorLinux Affected 6.14 and later Fixed in 6.18.36, 7.0.13, 7.1 Patch available CNA

CPE configurations NVD · 8

CPE	Versions	Role	Vendor
cpe:2.3:o:linux:linux_kernel::::::::	6.14 to before 6.18.36; 6.19 to before 7.0.13	Vulnerable	Linux
cpe:2.3:o:linux:linux_kernel:7.1:rc1::::::	7.1 rc1	Vulnerable	Linux
cpe:2.3:o:linux:linux_kernel:7.1:rc2::::::	7.1 rc2	Vulnerable	Linux
cpe:2.3:o:linux:linux_kernel:7.1:rc3::::::	7.1 rc3	Vulnerable	Linux
cpe:2.3:o:linux:linux_kernel:7.1:rc4::::::	7.1 rc4	Vulnerable	Linux
cpe:2.3:o:linux:linux_kernel:7.1:rc5::::::	7.1 rc5	Vulnerable	Linux
cpe:2.3:o:linux:linux_kernel:7.1:rc6::::::	7.1 rc6	Vulnerable	Linux
cpe:2.3:o:linux:linux_kernel:7.1:rc7::::::	7.1 rc7	Vulnerable	Linux

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 6.14 to before 6.18.36; 6.19 to before 7.0.13 Vulnerable ·Linux
cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* Versions 7.1 rc1 Vulnerable ·Linux
cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* Versions 7.1 rc2 Vulnerable ·Linux
cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* Versions 7.1 rc3 Vulnerable ·Linux
cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* Versions 7.1 rc4 Vulnerable ·Linux
cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:* Versions 7.1 rc5 Vulnerable ·Linux
cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:* Versions 7.1 rc6 Vulnerable ·Linux
cpe:2.3:o:linux:linux_kernel:7.1:rc7:*:*:*:*:*:* Versions 7.1 rc7 Vulnerable ·Linux

Remediation

Fix · CNA Linux (Linux) Fixed in 6.18.36, 7.0.13, 7.1

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

Not affected: 5 products

Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9

Timeline

2026-10-02 Threatist record created from CVE-2026-53363
2026-10-03 Alias added: GHSA-7xf9-r6gc-x4cm
2026-10-16 Affected versions changed · Red Hat

References

Patch 3

TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3

See all 15278 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences