{"id":"CVE-2026-45870","state":"PUBLISHED","title":"SUNRPC: auth_gss: fix memory leaks in XDR decoding error paths","description":"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.","publishedAt":"2026-05-27T12:15:50.199Z","updatedAt":"2026-05-27T12:15:50.199Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"1d658336b05f8697d6445834f8867f8ad5e4f735","status":"affected","lessThan":"c81431b1b9fbd21e9a5a9211b5517b7295d18e6a","versionType":"git"},{"version":"1d658336b05f8697d6445834f8867f8ad5e4f735","status":"affected","lessThan":"caf7eff432e91a9eba1c79fa545c2f54be15d62b","versionType":"git"},{"version":"1d658336b05f8697d6445834f8867f8ad5e4f735","status":"affected","lessThan":"64303b92d94c0c7845a273acd8d84b796d6f1db7","versionType":"git"},{"version":"1d658336b05f8697d6445834f8867f8ad5e4f735","status":"affected","lessThan":"df10f23defff22c8d55fe6db74f6e4ce927145bf","versionType":"git"},{"version":"1d658336b05f8697d6445834f8867f8ad5e4f735","status":"affected","lessThan":"b4af3806846778799cd4ab0766dc18341e777264","versionType":"git"},{"version":"1d658336b05f8697d6445834f8867f8ad5e4f735","status":"affected","lessThan":"d79b9097a6a2b91471b40755f1225364be5d85ff","versionType":"git"},{"version":"1d658336b05f8697d6445834f8867f8ad5e4f735","status":"affected","lessThan":"3b56eb90feb8a3709417f5624f3871847d42bcb1","versionType":"git"},{"version":"1d658336b05f8697d6445834f8867f8ad5e4f735","status":"affected","lessThan":"3e6397b056335cc56ef0e9da36c95946a19f5118","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sunrpc/auth_gss/gss_rpc_xdr.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.10","versionType":"semver"},{"version":"5.10.252","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.202","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.165","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.128","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.75","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.14","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.4","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sunrpc/auth_gss/gss_rpc_xdr.c"]}],"references":["https://git.kernel.org/stable/c/c81431b1b9fbd21e9a5a9211b5517b7295d18e6a","https://git.kernel.org/stable/c/caf7eff432e91a9eba1c79fa545c2f54be15d62b","https://git.kernel.org/stable/c/64303b92d94c0c7845a273acd8d84b796d6f1db7","https://git.kernel.org/stable/c/df10f23defff22c8d55fe6db74f6e4ce927145bf","https://git.kernel.org/stable/c/b4af3806846778799cd4ab0766dc18341e777264","https://git.kernel.org/stable/c/d79b9097a6a2b91471b40755f1225364be5d85ff","https://git.kernel.org/stable/c/3b56eb90feb8a3709417f5624f3871847d42bcb1","https://git.kernel.org/stable/c/3e6397b056335cc56ef0e9da36c95946a19f5118"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/45xxx/CVE-2026-45870.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-45870","state":"PUBLISHED","datePublished":"2026-05-27T12:15:50.199Z","dateUpdated":"2026-05-27T12:15:50.199Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-13T15:03:33.081Z"},"containers":{"cna":{"title":"SUNRPC: auth_gss: fix memory leaks in XDR decoding error paths","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"1d658336b05f8697d6445834f8867f8ad5e4f735","status":"affected","lessThan":"c81431b1b9fbd21e9a5a9211b5517b7295d18e6a","versionType":"git"},{"version":"1d658336b05f8697d6445834f8867f8ad5e4f735","status":"affected","lessThan":"caf7eff432e91a9eba1c79fa545c2f54be15d62b","versionType":"git"},{"version":"1d658336b05f8697d6445834f8867f8ad5e4f735","status":"affected","lessThan":"64303b92d94c0c7845a273acd8d84b796d6f1db7","versionType":"git"},{"version":"1d658336b05f8697d6445834f8867f8ad5e4f735","status":"affected","lessThan":"df10f23defff22c8d55fe6db74f6e4ce927145bf","versionType":"git"},{"version":"1d658336b05f8697d6445834f8867f8ad5e4f735","status":"affected","lessThan":"b4af3806846778799cd4ab0766dc18341e777264","versionType":"git"},{"version":"1d658336b05f8697d6445834f8867f8ad5e4f735","status":"affected","lessThan":"d79b9097a6a2b91471b40755f1225364be5d85ff","versionType":"git"},{"version":"1d658336b05f8697d6445834f8867f8ad5e4f735","status":"affected","lessThan":"3b56eb90feb8a3709417f5624f3871847d42bcb1","versionType":"git"},{"version":"1d658336b05f8697d6445834f8867f8ad5e4f735","status":"affected","lessThan":"3e6397b056335cc56ef0e9da36c95946a19f5118","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sunrpc/auth_gss/gss_rpc_xdr.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.10","versionType":"semver"},{"version":"5.10.252","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.202","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.165","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.128","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.75","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.14","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.4","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sunrpc/auth_gss/gss_rpc_xdr.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/c81431b1b9fbd21e9a5a9211b5517b7295d18e6a"},{"url":"https://git.kernel.org/stable/c/caf7eff432e91a9eba1c79fa545c2f54be15d62b"},{"url":"https://git.kernel.org/stable/c/64303b92d94c0c7845a273acd8d84b796d6f1db7"},{"url":"https://git.kernel.org/stable/c/df10f23defff22c8d55fe6db74f6e4ce927145bf"},{"url":"https://git.kernel.org/stable/c/b4af3806846778799cd4ab0766dc18341e777264"},{"url":"https://git.kernel.org/stable/c/d79b9097a6a2b91471b40755f1225364be5d85ff"},{"url":"https://git.kernel.org/stable/c/3b56eb90feb8a3709417f5624f3871847d42bcb1"},{"url":"https://git.kernel.org/stable/c/3e6397b056335cc56ef0e9da36c95946a19f5118"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-27T12:15:50.199Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"5.10.252"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"5.15.202"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"6.1.165"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"6.6.128"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"6.12.75"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"6.18.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"6.19.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"7.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}