{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-71120","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-01-13T15:30:19.654Z","datePublished":"2026-01-14T15:06:07.194Z","dateUpdated":"2026-09-08T08:43:58.946Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-05T12:12:11.294Z"},"descriptions":[{"lang":"en","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."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","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."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sunrpc/auth_gss/svcauth_gss.c"],"versions":[{"version":"5866efa8cbfbadf3905072798e96652faf02dbe8","lessThan":"a8f1e445ce3545c90d69c9e8ff8f7821825fe810","status":"affected","versionType":"git"},{"version":"5866efa8cbfbadf3905072798e96652faf02dbe8","lessThan":"4dedb6a11243a5c9eb9dbb97bca3c98bd725e83d","status":"affected","versionType":"git"},{"version":"5866efa8cbfbadf3905072798e96652faf02dbe8","lessThan":"f9e53f69ac3bc4ef568b08d3542edac02e83fefd","status":"affected","versionType":"git"},{"version":"5866efa8cbfbadf3905072798e96652faf02dbe8","lessThan":"7452d53f293379e2c38cfa8ad0694aa46fc4788b","status":"affected","versionType":"git"},{"version":"5866efa8cbfbadf3905072798e96652faf02dbe8","lessThan":"a2c6f25ab98b423f99ccd94874d655b8bcb01a19","status":"affected","versionType":"git"},{"version":"5866efa8cbfbadf3905072798e96652faf02dbe8","lessThan":"1c8bb965e9b0559ff0f5690615a527c30f651dd8","status":"affected","versionType":"git"},{"version":"5866efa8cbfbadf3905072798e96652faf02dbe8","lessThan":"d4b69a6186b215d2dc1ebcab965ed88e8d41768d","status":"affected","versionType":"git"},{"version":"66ed7b413d31c6ff23901ac4443b1cc1af2f6113","status":"affected","versionType":"git"},{"version":"7be8c165dc81564705e8e0b72d398ef708f67eaa","status":"affected","versionType":"git"},{"version":"4.19.99","lessThan":"4.20","status":"affected","versionType":"semver"},{"version":"5.4.15","lessThan":"5.5","status":"affected","versionType":"semver"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sunrpc/auth_gss/svcauth_gss.c"],"versions":[{"version":"5.5","status":"affected"},{"version":"0","lessThan":"5.5","status":"unaffected","versionType":"semver"},{"version":"5.10.248","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.198","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.160","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.120","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.64","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.3","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"5.10.248"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"5.15.198"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.1.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.6.120"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.12.64"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.18.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.19"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19.99"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4.15"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/a8f1e445ce3545c90d69c9e8ff8f7821825fe810"},{"url":"https://git.kernel.org/stable/c/4dedb6a11243a5c9eb9dbb97bca3c98bd725e83d"},{"url":"https://git.kernel.org/stable/c/f9e53f69ac3bc4ef568b08d3542edac02e83fefd"},{"url":"https://git.kernel.org/stable/c/7452d53f293379e2c38cfa8ad0694aa46fc4788b"},{"url":"https://git.kernel.org/stable/c/a2c6f25ab98b423f99ccd94874d655b8bcb01a19"},{"url":"https://git.kernel.org/stable/c/1c8bb965e9b0559ff0f5690615a527c30f651dd8"},{"url":"https://git.kernel.org/stable/c/d4b69a6186b215d2dc1ebcab965ed88e8d41768d"}],"title":"SUNRPC: svcauth_gss: avoid NULL deref on zero length gss_token in gss_read_proxy_verf","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2025-71120","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-06-10T20:42:25.150500Z"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-06-11T18:44:22.946Z"}},{"x_adpType":"supplier","providerMetadata":{"orgId":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e","shortName":"siemens-SADP","dateUpdated":"2026-09-08T08:43:58.946Z"},"affected":[{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","versions":[{"status":"affected","version":"V3.1.6","lessThan":"*","versionType":"custom"}],"defaultStatus":"unknown"},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","versions":[{"status":"affected","version":"V3.1.6","lessThan":"*","versionType":"custom"}],"defaultStatus":"unknown"},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","versions":[{"status":"affected","version":"V3.1.6","lessThan":"*","versionType":"custom"}],"defaultStatus":"unknown"},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","versions":[{"status":"affected","version":"V3.1.6","lessThan":"*","versionType":"custom"}],"defaultStatus":"unknown"},{"vendor":"Siemens","product":"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP","versions":[{"status":"affected","version":"V3.1.6","lessThan":"*","versionType":"custom"}],"defaultStatus":"unknown"}],"references":[{"url":"https://cert-portal.siemens.com/productcert/html/ssa-019113.html"}]}]}}