242 lines
12 KiB
JSON
242 lines
12 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-2021-47623",
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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": "2024-07-16T11:26:52.956Z",
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"datePublished": "2024-07-16T11:29:39.071Z",
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"dateUpdated": "2026-05-11T13:58:05.571Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-05-11T13:58:05.571Z"
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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\npowerpc/fixmap: Fix VM debug warning on unmap\n\nUnmapping a fixmap entry is done by calling __set_fixmap()\nwith FIXMAP_PAGE_CLEAR as flags.\n\nToday, powerpc __set_fixmap() calls map_kernel_page().\n\nmap_kernel_page() is not happy when called a second time\nfor the same page.\n\n\tWARNING: CPU: 0 PID: 1 at arch/powerpc/mm/pgtable.c:194 set_pte_at+0xc/0x1e8\n\tCPU: 0 PID: 1 Comm: swapper Not tainted 5.16.0-rc3-s3k-dev-01993-g350ff07feb7d-dirty #682\n\tNIP: c0017cd4 LR: c00187f0 CTR: 00000010\n\tREGS: e1011d50 TRAP: 0700 Not tainted (5.16.0-rc3-s3k-dev-01993-g350ff07feb7d-dirty)\n\tMSR: 00029032 <EE,ME,IR,DR,RI> CR: 42000208 XER: 00000000\n\n\tGPR00: c0165fec e1011e10 c14c0000 c0ee2550 ff800000 c0f3d000 00000000 c001686c\n\tGPR08: 00001000 b00045a9 00000001 c0f58460 c0f50000 00000000 c0007e10 00000000\n\tGPR16: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000\n\tGPR24: 00000000 00000000 c0ee2550 00000000 c0f57000 00000ff8 00000000 ff800000\n\tNIP [c0017cd4] set_pte_at+0xc/0x1e8\n\tLR [c00187f0] map_kernel_page+0x9c/0x100\n\tCall Trace:\n\t[e1011e10] [c0736c68] vsnprintf+0x358/0x6c8 (unreliable)\n\t[e1011e30] [c0165fec] __set_fixmap+0x30/0x44\n\t[e1011e40] [c0c13bdc] early_iounmap+0x11c/0x170\n\t[e1011e70] [c0c06cb0] ioremap_legacy_serial_console+0x88/0xc0\n\t[e1011e90] [c0c03634] do_one_initcall+0x80/0x178\n\t[e1011ef0] [c0c0385c] kernel_init_freeable+0xb4/0x250\n\t[e1011f20] [c0007e34] kernel_init+0x24/0x140\n\t[e1011f30] [c0016268] ret_from_kernel_thread+0x5c/0x64\n\tInstruction dump:\n\t7fe3fb78 48019689 80010014 7c630034 83e1000c 5463d97e 7c0803a6 38210010\n\t4e800020 81250000 712a0001 41820008 <0fe00000> 9421ffe0 93e1001c 48000030\n\nImplement unmap_kernel_page() which clears an existing pte."
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"arch/powerpc/include/asm/book3s/32/pgtable.h",
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"arch/powerpc/include/asm/book3s/64/pgtable.h",
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"arch/powerpc/include/asm/fixmap.h",
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"arch/powerpc/include/asm/nohash/32/pgtable.h",
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"arch/powerpc/include/asm/nohash/64/pgtable.h",
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"arch/powerpc/mm/pgtable.c"
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],
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"versions": [
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{
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"version": "265c3491c4bc8d40587996d6ee2f447a7ccfb4f3",
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"lessThan": "67baac10dd5ad1e9f50e8f2659984b3b0728d54e",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "265c3491c4bc8d40587996d6ee2f447a7ccfb4f3",
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"lessThan": "43ae0ccc4d2722b833fb59b905af129428e06d03",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "265c3491c4bc8d40587996d6ee2f447a7ccfb4f3",
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"lessThan": "033fd42c18d9b2121595b6f1e8419a115f9ac5b7",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "265c3491c4bc8d40587996d6ee2f447a7ccfb4f3",
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"lessThan": "aec982603aa8cc0a21143681feb5f60ecc69d718",
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"status": "affected",
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"arch/powerpc/include/asm/book3s/32/pgtable.h",
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"arch/powerpc/include/asm/book3s/64/pgtable.h",
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"arch/powerpc/include/asm/fixmap.h",
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"arch/powerpc/include/asm/nohash/32/pgtable.h",
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"arch/powerpc/include/asm/nohash/64/pgtable.h",
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"arch/powerpc/mm/pgtable.c"
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],
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"versions": [
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{
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"version": "5.5",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "5.5",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.101",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.24",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.16.10",
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"lessThanOrEqual": "5.16.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.17",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.5",
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"versionEndExcluding": "5.10.101"
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"references": [
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"url": "https://git.kernel.org/stable/c/67baac10dd5ad1e9f50e8f2659984b3b0728d54e"
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},
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"url": "https://git.kernel.org/stable/c/43ae0ccc4d2722b833fb59b905af129428e06d03"
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{
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"url": "https://git.kernel.org/stable/c/033fd42c18d9b2121595b6f1e8419a115f9ac5b7"
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}
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],
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"title": "powerpc/fixmap: Fix VM debug warning on unmap",
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"type": "ssvc",
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"content": {
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"id": "CVE-2021-47623",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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