{"id":"CVE-2026-99092","revision":null,"records":[{"revision":"f0676e6eaf2e46d891a414f61a859a3b","observedAt":"2026-10-26T15:35:30.984+00:00","statement":{"source":"cve-program","id":"CVE-2026-99092","aliases":[],"title":"riscv: patch: fix handling of bpf-jit execmem addresses","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nriscv: patch: fix handling of bpf-jit execmem addresses\n\nCommit 8718e5a3090b (\"riscv: patch: skip fixmap mapping when kernel text\nis already writable\") gated the core_kernel_text() branch of patch_map()\non CONFIG_STRICT_KERNEL_RWX, and explicitly left the vmalloc branch\nunchanged. That branch has a separate problem.\n\nThat branch only creates a temporary writable fixmap alias when\nCONFIG_STRICT_MODULE_RWX is enabled, and otherwise assumes the target is\ndirectly writable and returns the address unchanged. That assumption no\nlonger holds: bpf_prog_pack_alloc calls set_memory_rox() on every pack\nunconditionally in alloc_new_pack(), independently of any\nCONFIG_STRICT_*_RWX option, so BPF text in the vmalloc area is read-only\nregardless of what CONFIG_STRICT_MODULE_RWX says.\n\nWith CONFIG_STRICT_MODULE_RWX=n, patch_map() returns the read-only\naddress directly, the subsequent copy_to_kernel_nofault() takes a\npage fault and returns -EFAULT. bpf_arch_text_copy() turns that into\n-EINVAL, which propagates through bpf_jit_binary_pack_finalize() to the\nWARN_ON() in bpf_int_jit_compile() and leaves the program un-JITed.\n\nNote that BPF cannot be fixed the way kprobes was in\ncommit bdc46e507b59 (\"riscv: mm: make EXECMEM_KPROBES writable without\nCONFIG_STRICT_MODULE_RWX\"). EXECMEM_BPF is already PAGE_KERNEL, i.e.\nwritable at allocation time; the read-only mapping is established\nafterwards by generic code in alloc_new_pack(), which arch code cannot\ninfluence. The only place this can be handled is patch_map().\n\nThis is the same problem that was fixed on arm64 by commit b1480ed230ac\n(\"arm64: patching: fix handling of execmem addresses\"), and the fix is\nthe same: CONFIG_EXECMEM is what actually tracks whether the vmalloc\narea can hold executable memory that needs a temporary alias to be\nwritten. CONFIG_BPF_JIT, CONFIG_KPROBES and CONFIG_MODULES all select\nit.\n\nNote that this is not limited to CONFIG_MODULES=n. Unlike arm64, riscv\nselects CONFIG_ARCH_OPTIONAL_KERNEL_RWX, so CONFIG_STRICT_MODULE_RWX can\nbe disabled with CONFIG_MODULES=y as well, and the bug is reachable in\nthat configuration too.\n\nThe !CONFIG_MMU build is unaffected: it has its own __patch_insn_set()\nand __patch_insn_write() implementations and never calls patch_map().","state":0,"publishedAt":"2026-10-26T14:52:00.86+00:00","modifiedAt":"2026-10-26T14:52:00.86+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"arch/riscv/kernel/patch.c\"\n ],\n \"versions\": [\n {\n \"version\": \"2c9e5d4a008293407836d29d35dfd4353615bd2f\",\n \"lessThan\": \"562a35b9e0b3d9483d9472995219cadb3592db3d\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"2c9e5d4a008293407836d29d35dfd4353615bd2f\",\n \"lessThan\": \"9e8fc7972b398e9dc2415ece283d8f64edac3858\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"2c9e5d4a008293407836d29d35dfd4353615bd2f\",\n \"lessThan\": \"f71d6ea3843c8038c431c2699482f246aea37ca0\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"2c9e5d4a008293407836d29d35dfd4353615bd2f\",\n \"lessThan\": \"a510e1ae8c9030750c2edf7b0bc9b186cd8c7a06\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"arch/riscv/kernel/patch.c\"\n ],\n \"versions\": [\n {\n \"version\": \"6.10\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"6.10\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.114\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.58\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.2.11\",\n \"lessThanOrEqual\": \"7.2.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.3\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/562a35b9e0b3d9483d9472995219cadb3592db3d","https://git.kernel.org/stable/c/9e8fc7972b398e9dc2415ece283d8f64edac3858","https://git.kernel.org/stable/c/f71d6ea3843c8038c431c2699482f246aea37ca0","https://git.kernel.org/stable/c/a510e1ae8c9030750c2edf7b0bc9b186cd8c7a06"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-99092","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-99092","identifiers":["CVE-2026-99092"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-10-27T17:47:33.6124923+00:00","complete":true,"records":1758,"lastAttemptAt":"2026-10-27T17:47:33.6124923+00:00","lastSuccessAt":"2026-10-27T17:47:33.8177497+00:00","error":null,"lastVerifiedAt":"2026-10-27T17:47:33.8177523+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-187d2b72c94ceb8c4417f1032ec3109a3a3a7b730abadb561d8cdd2a96e04d27-1d364ac0cd434b550397ee70228a56931aa833d8a6b261c3e6bc70a57b06a0f6","complete":true,"records":415299,"lastAttemptAt":"2026-10-27T17:44:11.2286896+00:00","lastSuccessAt":"2026-10-27T17:44:09.7084381+00:00","error":null,"lastVerifiedAt":"2026-10-27T17:44:11.2286896+00:00","snapshotPublishedAt":"2026-10-27T17:26:23+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-43321610382942b8ad8c85917eab1546","complete":false,"records":4735,"lastAttemptAt":"2026-10-27T17:47:37.4970153+00:00","lastSuccessAt":"2026-10-24T23:18:49.862+00:00","error":"InvalidDataException","lastVerifiedAt":"2026-10-24T23:18:49.862+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":0,"expectedIdentifiers":13497},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-10-27T17:47:33.6124923+00:00","complete":true,"records":1093,"lastAttemptAt":"2026-10-27T17:47:33.6124923+00:00","lastSuccessAt":"2026-10-27T17:47:33.818584+00:00","error":null,"lastVerifiedAt":"2026-10-27T17:47:33.8185844+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-b877d586fc144938aa44089e665cd1e0","complete":true,"records":13434,"lastAttemptAt":"2026-10-27T17:47:34.5117551+00:00","lastSuccessAt":"2026-10-27T16:46:14.705+00:00","error":null,"lastVerifiedAt":"2026-10-27T16:46:14.705+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13497,"expectedIdentifiers":13497},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-439cd5d099ccb2499c5497741843190e65b167cf304db2a157938d3d4847a993","complete":true,"records":9783,"lastAttemptAt":"2026-10-27T17:47:33.2623747+00:00","lastSuccessAt":"2026-10-27T16:45:44.7050411+00:00","error":null,"lastVerifiedAt":"2026-10-27T17:47:33.2623747+00:00","snapshotPublishedAt":"2026-10-27T16:03:45+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-bad5d31e7f6a5e3d338e11d8789069b63620a403f927730769688b42f768e4f6","complete":true,"records":1965,"lastAttemptAt":"2026-10-27T17:44:11.7010721+00:00","lastSuccessAt":"2026-10-26T16:35:43.1460623+00:00","error":null,"lastVerifiedAt":"2026-10-27T17:44:11.7010721+00:00","snapshotPublishedAt":"2026-10-26T16:18:29+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-3a5b306d60fc44677a03a8afc99d87e6c5402770ef68d560f94a8c3ad3802b75","complete":true,"records":3001,"lastAttemptAt":"2026-10-27T17:47:33.5548586+00:00","lastSuccessAt":"2026-10-27T16:45:49.0050993+00:00","error":null,"lastVerifiedAt":"2026-10-27T17:47:33.5548586+00:00","snapshotPublishedAt":"2026-10-27T16:33:43+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-9879a6cc2cfcef686e74484f528ab0a58581fed33334cc3f63a0864323c73deb","complete":true,"records":230833,"lastAttemptAt":"2026-10-27T17:47:33.1113165+00:00","lastSuccessAt":"2026-10-27T17:47:31.417422+00:00","error":null,"lastVerifiedAt":"2026-10-27T17:47:33.1113165+00:00","snapshotPublishedAt":"2026-10-27T17:33:24+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null}]}