469 lines
22 KiB
JSON
469 lines
22 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2025-71120",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-01-13T15:30:19.654Z",
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"datePublished": "2026-01-14T15:06:07.194Z",
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"dateUpdated": "2026-11-10T12:39:11.860Z"
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},
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"containers": {
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"cna": {
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"dateUpdated": "2026-08-05T12:12:11.294Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nSUNRPC: svcauth_gss: avoid NULL deref on zero length gss_token in gss_read_proxy_verf\n\nA zero length gss_token results in pages == 0 and in_token->pages[0]\nis NULL. The code unconditionally evaluates\npage_address(in_token->pages[0]) for the initial memcpy, which can\ndereference NULL even when the copy length is 0. Guard the first\nmemcpy so it only runs when length > 0."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"baseScore": 7.5,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:N - An unauthenticated remote client can send an RPCSEC_GSS INIT request with a zero-length token to a network-facing kernel SUNRPC service using gss-proxy.\nAC:L - A single crafted request deterministically produces zero pages and a NULL first-page pointer; no race, timing, or memory shaping is required.\nPR:N - The fault occurs during pre-authentication GSS context establishment, before Kerberos validation, export authorization, reserved-port checks, or the gss-proxy upcall.\nUI:N - Once the affected SUNRPC service and gss-proxy backend are running, exploitation requires no action by a victim.\nS:U - The fault affects the same host kernel and RPC service processing the malicious request and does not cross a virtualization or IOMMU boundary.\nC:N - The zero-length operation copies no bytes and exposes no kernel memory.\nI:N - No bytes are written and no memory corruption or attacker-controlled modification occurs.\nA:H - Evaluating page_address on the NULL page can cause a kernel oops or panic, and unauthenticated requests can be repeated to kill workers or deny service."
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}
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]
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}
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}
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],
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"title": "SUNRPC: svcauth_gss: avoid NULL deref on zero length gss_token in gss_read_proxy_verf",
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"role": "CISA Coordinator",
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"options": [
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{
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"description": "CWE-476 NULL Pointer Dereference"
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}
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]
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}
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],
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"title": "CISA ADP Vulnrichment",
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},
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