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Vulnerability details: VCID-xkj5-rhsg-kfge
Vulnerability ID VCID-xkj5-rhsg-kfge
Aliases CVE-2026-31472
Summary In the Linux kernel, the following vulnerability has been resolved: xfrm: iptfs: validate inner IPv4 header length in IPTFS payload Add validation of the inner IPv4 packet tot_len and ihl fields parsed from decrypted IPTFS payloads in __input_process_payload(). A crafted ESP packet containing an inner IPv4 header with tot_len=0 causes an infinite loop: iplen=0 leads to capturelen=min(0, remaining)=0, so the data offset never advances and the while(data < tail) loop never terminates, spinning forever in softirq context. Reject inner IPv4 packets where tot_len < ihl*4 or ihl*4 < sizeof(struct iphdr), which catches both the tot_len=0 case and malformed ihl values. The normal IP stack performs this validation in ip_rcv_core(), but IPTFS extracts and processes inner packets before they reach that layer.
Status Published
Exploitability None
Weighted Severity None
Risk None
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-606 Unchecked Input for Loop Condition
System Score Found at
epss 0.00013 https://api.first.org/data/v1/epss?cve=CVE-2026-31472
epss 0.00013 https://api.first.org/data/v1/epss?cve=CVE-2026-31472
epss 0.00013 https://api.first.org/data/v1/epss?cve=CVE-2026-31472
epss 0.00013 https://api.first.org/data/v1/epss?cve=CVE-2026-31472
epss 0.00017 https://api.first.org/data/v1/epss?cve=CVE-2026-31472
epss 0.00017 https://api.first.org/data/v1/epss?cve=CVE-2026-31472
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-31472.json
https://api.first.org/data/v1/epss?cve=CVE-2026-31472
2460676 https://bugzilla.redhat.com/show_bug.cgi?id=2460676
No exploits are available.
There are no known vectors.
Exploit Prediction Scoring System (EPSS)
Percentile 0.02195
EPSS Score 0.00013
Published At April 29, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-23T05:41:01.291368+00:00 Debian Importer Import https://security-tracker.debian.org/tracker/data/json 38.4.0