{"affected":[{"conditional":false,"product":"linux_kernel","source":"NVD","vendor":"linux","versions":[{"greaterThanOrEqual":"6.14.1","lessThan":"6.18.21","status":"affected","version":"*","versionType":"custom"}]},{"conditional":false,"product":"linux_kernel","source":"NVD","vendor":"linux","versions":[{"greaterThanOrEqual":"6.19","lessThan":"6.19.11","status":"affected","version":"*","versionType":"custom"}]},{"conditional":false,"product":"linux_kernel","source":"NVD","vendor":"linux","versions":[{"status":"affected","version":"6.14","versionType":"custom"}]},{"conditional":false,"product":"linux_kernel","source":"NVD","vendor":"linux","versions":[{"status":"affected","version":"7.0","versionType":"custom"}]}],"cpeConfigurations":[{"negate":false,"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.21","versionStartIncluding":"6.14.1","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.11","versionStartIncluding":"6.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:6.14:-:*:*:*:*:*:*","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*","vulnerable":true}],"negate":false,"operator":"OR"}],"operator":"OR"}],"cveId":"CVE-2026-31472","cwes":["CWE-835"],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: iptfs: validate inner IPv4 header length in IPTFS payload\n\nAdd validation of the inner IPv4 packet tot_len and ihl fields parsed\nfrom decrypted IPTFS payloads in __input_process_payload(). A crafted\nESP packet containing an inner IPv4 header with tot_len=0 causes an\ninfinite loop: iplen=0 leads to capturelen=min(0, remaining)=0, so the\ndata offset never advances and the while(data < tail) loop never\nterminates, spinning forever in softirq context.\n\nReject inner IPv4 packets where tot_len < ihl*4 or ihl*4 < sizeof(struct\niphdr), which catches both the tot_len=0 case and malformed ihl values.\nThe normal IP stack performs this validation in ip_rcv_core(), but IPTFS\nextracts and processes inner packets before they reach that layer.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":5.5,"severity":"medium","source":"NVD: nvd@nist.gov","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}],"modifiedAt":1794438600263,"publishedAt":1776867403740,"references":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"url":"https://git.kernel.org/stable/c/0d10393d5eac33cbd92f7a41fddca12c41d3cb7e"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"url":"https://git.kernel.org/stable/c/3db7d4f777a00164582061ccaa99569cd85011a3"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"url":"https://git.kernel.org/stable/c/de6d8e8ce5187f7402c9859b443355e7120c5f09"}],"remediation":[{"kind":"fix","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://git.kernel.org/stable/c/0d10393d5eac33cbd92f7a41fddca12c41d3cb7e"},{"kind":"fix","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://git.kernel.org/stable/c/3db7d4f777a00164582061ccaa99569cd85011a3"},{"kind":"fix","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://git.kernel.org/stable/c/de6d8e8ce5187f7402c9859b443355e7120c5f09"}],"revision":"834bf01e68f1a7b3cb65503254da9e690a09c6eea3c76a6a17c5c245dc781ae6","sources":[{"modifiedAt":1794438600263,"name":"NVD","retrievedAt":1794442699830,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31472"}],"ssvc":null,"status":"published","title":"CVE-2026-31472","updatedAt":1794442699830}