{"id":"CVE-2026-45870","summary":"SUNRPC: auth_gss: fix memory leaks in XDR decoding error paths","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nSUNRPC: auth_gss: fix memory leaks in XDR decoding error paths\n\nThe gssx_dec_ctx(), gssx_dec_status(), and gssx_dec_name()\nfunctions allocate memory via gssx_dec_buffer(), which calls\nkmemdup(). When a subsequent decode operation fails, these\nfunctions return immediately without freeing previously\nallocated buffers, causing memory leaks.\n\nThe leak in gssx_dec_ctx() is particularly relevant because\nthe caller (gssp_accept_sec_context_upcall) initializes several\nbuffer length fields to non-zero values, resulting in memory\nallocation:\n\n    struct gssx_ctx rctxh = {\n        .exported_context_token.len = GSSX_max_output_handle_sz,\n        .mech.len = GSS_OID_MAX_LEN,\n        .src_name.display_name.len = GSSX_max_princ_sz,\n        .targ_name.display_name.len = GSSX_max_princ_sz\n    };\n\nIf, for example, gssx_dec_name() succeeds for src_name but\nfails for targ_name, the memory allocated for\nexported_context_token, mech, and src_name.display_name\nremains unreferenced and cannot be reclaimed.\n\nAdd error handling with goto-based cleanup to free any\npreviously allocated buffers before returning an error.","modified":"2026-07-03T18:29:18.451897349Z","published":"2026-05-27T12:15:50.199Z","related":["SUSE-SU-2026:22433-1","SUSE-SU-2026:22436-1","SUSE-SU-2026:2450-1","SUSE-SU-2026:2722-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45870.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/3b56eb90feb8a3709417f5624f3871847d42bcb1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3e6397b056335cc56ef0e9da36c95946a19f5118"},{"type":"WEB","url":"https://git.kernel.org/stable/c/64303b92d94c0c7845a273acd8d84b796d6f1db7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b4af3806846778799cd4ab0766dc18341e777264"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c81431b1b9fbd21e9a5a9211b5517b7295d18e6a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/caf7eff432e91a9eba1c79fa545c2f54be15d62b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d79b9097a6a2b91471b40755f1225364be5d85ff"},{"type":"WEB","url":"https://git.kernel.org/stable/c/df10f23defff22c8d55fe6db74f6e4ce927145bf"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45870.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45870"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"1d658336b05f8697d6445834f8867f8ad5e4f735"},{"fixed":"c81431b1b9fbd21e9a5a9211b5517b7295d18e6a"},{"fixed":"caf7eff432e91a9eba1c79fa545c2f54be15d62b"},{"fixed":"64303b92d94c0c7845a273acd8d84b796d6f1db7"},{"fixed":"df10f23defff22c8d55fe6db74f6e4ce927145bf"},{"fixed":"b4af3806846778799cd4ab0766dc18341e777264"},{"fixed":"d79b9097a6a2b91471b40755f1225364be5d85ff"},{"fixed":"3b56eb90feb8a3709417f5624f3871847d42bcb1"},{"fixed":"3e6397b056335cc56ef0e9da36c95946a19f5118"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-45870.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.10.0"},{"fixed":"5.10.252"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.202"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.165"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.128"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.75"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.14"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-45870.json"}}],"schema_version":"1.7.5"}