{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2025-21869", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-21869", "idYear": 2025, "status": "PUBLISHED", "publishedAt": "2025-03-27T13:38:22.229Z", "updatedAt": "2026-05-11T21:08:05.914Z", "importedAt": "2026-10-24T01:57:29.455Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "powerpc/code-patching: Disable KASAN report during patching via temporary mm", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/code-patching: Disable KASAN report during patching via temporary mm\n\nErhard reports the following KASAN hit on Talos II (power9) with kernel 6.13:\n\n[ 12.028126] ==================================================================\n[ 12.028198] BUG: KASAN: user-memory-access in copy_to_kernel_nofault+0x8c/0x1a0\n[ 12.028260] Write of size 8 at addr 0000187e458f2000 by task systemd/1\n\n[ 12.028346] CPU: 87 UID: 0 PID: 1 Comm: systemd Tainted: G T 6.13.0-P9-dirty #3\n[ 12.028408] Tainted: [T]=RANDSTRUCT\n[ 12.028446] Hardware name: T2P9D01 REV 1.01 POWER9 0x4e1202 opal:skiboot-bc106a0 PowerNV\n[ 12.028500] Call Trace:\n[ 12.028536] [c000000008dbf3b0] [c000000001656a48] dump_stack_lvl+0xbc/0x110 (unreliable)\n[ 12.028609] [c000000008dbf3f0] [c0000000006e2fc8] print_report+0x6b0/0x708\n[ 12.028666] [c000000008dbf4e0] [c0000000006e2454] kasan_report+0x164/0x300\n[ 12.028725] [c000000008dbf600] [c0000000006e54d4] kasan_check_range+0x314/0x370\n[ 12.028784] [c000000008dbf640] [c0000000006e6310] __kasan_check_write+0x20/0x40\n[ 12.028842] [c000000008dbf660] [c000000000578e8c] copy_to_kernel_nofault+0x8c/0x1a0\n[ 12.028902] [c000000008dbf6a0] [c0000000000acfe4] __patch_instructions+0x194/0x210\n[ 12.028965] [c000000008dbf6e0] [c0000000000ade80] patch_instructions+0x150/0x590\n[ 12.029026] [c000000008dbf7c0] [c0000000001159bc] bpf_arch_text_copy+0x6c/0xe0\n[ 12.029085] [c000000008dbf800] [c000000000424250] bpf_jit_binary_pack_finalize+0x40/0xc0\n[ 12.029147] [c000000008dbf830] [c000000000115dec] bpf_int_jit_compile+0x3bc/0x930\n[ 12.029206] [c000000008dbf990] [c000000000423720] bpf_prog_select_runtime+0x1f0/0x280\n[ 12.029266] [c000000008dbfa00] [c000000000434b18] bpf_prog_load+0xbb8/0x1370\n[ 12.029324] [c000000008dbfb70] [c000000000436ebc] __sys_bpf+0x5ac/0x2e00\n[ 12.029379] [c000000008dbfd00] [c00000000043a228] sys_bpf+0x28/0x40\n[ 12.029435] [c000000008dbfd20] [c000000000038eb4] system_call_exception+0x334/0x610\n[ 12.029497] [c000000008dbfe50] [c00000000000c270] system_call_vectored_common+0xf0/0x280\n[ 12.029561] --- interrupt: 3000 at 0x3fff82f5cfa8\n[ 12.029608] NIP: 00003fff82f5cfa8 LR: 00003fff82f5cfa8 CTR: 0000000000000000\n[ 12.029660] REGS: c000000008dbfe80 TRAP: 3000 Tainted: G T (6.13.0-P9-dirty)\n[ 12.029735] MSR: 900000000280f032 CR: 42004848 XER: 00000000\n[ 12.029855] IRQMASK: 0\n GPR00: 0000000000000169 00003fffdcf789a0 00003fff83067100 0000000000000005\n GPR04: 00003fffdcf78a98 0000000000000090 0000000000000000 0000000000000008\n GPR08: 0000000000000000 0000000000000000 0000000000000000 0000000000000000\n GPR12: 0000000000000000 00003fff836ff7e0 c000000000010678 0000000000000000\n GPR16: 0000000000000000 0000000000000000 00003fffdcf78f28 00003fffdcf78f90\n GPR20: 0000000000000000 0000000000000000 0000000000000000 00003fffdcf78f80\n GPR24: 00003fffdcf78f70 00003fffdcf78d10 00003fff835c7239 00003fffdcf78bd8\n GPR28: 00003fffdcf78a98 0000000000000000 0000000000000000 000000011f547580\n[ 12.030316] NIP [00003fff82f5cfa8] 0x3fff82f5cfa8\n[ 12.030361] LR [00003fff82f5cfa8] 0x3fff82f5cfa8\n[ 12.030405] --- interrupt: 3000\n[ 12.030444] ==================================================================\n\nCommit c28c15b6d28a (\"powerpc/code-patching: Use temporary mm for\nRadix MMU\") is inspired from x86 but unlike x86 is doesn't disable\nKASAN reports during patching. This wasn't a problem at the begining\nbecause __patch_mem() is not instrumented.\n\nCommit 465cabc97b42 (\"powerpc/code-patching: introduce\npatch_instructions()\") use copy_to_kernel_nofault() to copy several\ninstructions at once. But when using temporary mm the destination is\nnot regular kernel memory but a kind of kernel-like memory located\nin user address space. \n---truncated---", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "465cabc97b42405eb89380ea6ba8d8b03e4ae1a2", "status": "affected", "versionType": "git", "lessThan": "5980d4456dd66d1b6505d5ec15048bd87e8775e0" }, { "version": "465cabc97b42405eb89380ea6ba8d8b03e4ae1a2", "status": "affected", "versionType": "git", "lessThan": "ea291447a4031f3dac5c23d55bc83fe833820d84" }, { "version": "465cabc97b42405eb89380ea6ba8d8b03e4ae1a2", "status": "affected", "versionType": "git", "lessThan": "dc9c5166c3cb044f8a001e397195242fd6796eee" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "6.7", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "6.7" }, { "version": "6.12.17", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.13.5", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.13.*" }, { "version": "6.14", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }