{ "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-2024-50067", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2024-50067", "idYear": 2024, "status": "PUBLISHED", "publishedAt": "2024-10-28T00:57:05.734Z", "updatedAt": "2026-08-05T11:41:22.544Z", "importedAt": "2026-10-24T01:57:20.494Z", "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": "uprobe: avoid out-of-bounds memory access of fetching args", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nuprobe: avoid out-of-bounds memory access of fetching args\n\nUprobe needs to fetch args into a percpu buffer, and then copy to ring\nbuffer to avoid non-atomic context problem.\n\nSometimes user-space strings, arrays can be very large, but the size of\npercpu buffer is only page size. And store_trace_args() won't check\nwhether these data exceeds a single page or not, caused out-of-bounds\nmemory access.\n\nIt could be reproduced by following steps:\n1. build kernel with CONFIG_KASAN enabled\n2. save follow program as test.c\n\n```\n\\#include \n\\#include \n\\#include \n\n// If string length large than MAX_STRING_SIZE, the fetch_store_strlen()\n// will return 0, cause __get_data_size() return shorter size, and\n// store_trace_args() will not trigger out-of-bounds access.\n// So make string length less than 4096.\n\\#define STRLEN 4093\n\nvoid generate_string(char *str, int n)\n{\n int i;\n for (i = 0; i < n; ++i)\n {\n char c = i % 26 + 'a';\n str[i] = c;\n }\n str[n-1] = '\\0';\n}\n\nvoid print_string(char *str)\n{\n printf(\"%s\\n\", str);\n}\n\nint main()\n{\n char tmp[STRLEN];\n\n generate_string(tmp, STRLEN);\n print_string(tmp);\n\n return 0;\n}\n```\n3. compile program\n`gcc -o test test.c`\n\n4. get the offset of `print_string()`\n```\nobjdump -t test | grep -w print_string\n0000000000401199 g F .text 000000000000001b print_string\n```\n\n5. configure uprobe with offset 0x1199\n```\noff=0x1199\n\ncd /sys/kernel/debug/tracing/\necho \"p /root/test:${off} arg1=+0(%di):ustring arg2=\\$comm arg3=+0(%di):ustring\"\n > uprobe_events\necho 1 > events/uprobes/enable\necho 1 > tracing_on\n```\n\n6. run `test`, and kasan will report error.\n==================================================================\nBUG: KASAN: use-after-free in strncpy_from_user+0x1d6/0x1f0\nWrite of size 8 at addr ffff88812311c004 by task test/499CPU: 0 UID: 0 PID: 499 Comm: test Not tainted 6.12.0-rc3+ #18\nHardware name: Red Hat KVM, BIOS 1.16.0-4.al8 04/01/2014\nCall Trace:\n \n dump_stack_lvl+0x55/0x70\n print_address_description.constprop.0+0x27/0x310\n kasan_report+0x10f/0x120\n ? strncpy_from_user+0x1d6/0x1f0\n strncpy_from_user+0x1d6/0x1f0\n ? rmqueue.constprop.0+0x70d/0x2ad0\n process_fetch_insn+0xb26/0x1470\n ? __pfx_process_fetch_insn+0x10/0x10\n ? _raw_spin_lock+0x85/0xe0\n ? __pfx__raw_spin_lock+0x10/0x10\n ? __pte_offset_map+0x1f/0x2d0\n ? unwind_next_frame+0xc5f/0x1f80\n ? arch_stack_walk+0x68/0xf0\n ? is_bpf_text_address+0x23/0x30\n ? kernel_text_address.part.0+0xbb/0xd0\n ? __kernel_text_address+0x66/0xb0\n ? unwind_get_return_address+0x5e/0xa0\n ? __pfx_stack_trace_consume_entry+0x10/0x10\n ? arch_stack_walk+0xa2/0xf0\n ? _raw_spin_lock_irqsave+0x8b/0xf0\n ? __pfx__raw_spin_lock_irqsave+0x10/0x10\n ? depot_alloc_stack+0x4c/0x1f0\n ? _raw_spin_unlock_irqrestore+0xe/0x30\n ? stack_depot_save_flags+0x35d/0x4f0\n ? kasan_save_stack+0x34/0x50\n ? kasan_save_stack+0x24/0x50\n ? mutex_lock+0x91/0xe0\n ? __pfx_mutex_lock+0x10/0x10\n prepare_uprobe_buffer.part.0+0x2cd/0x500\n uprobe_dispatcher+0x2c3/0x6a0\n ? __pfx_uprobe_dispatcher+0x10/0x10\n ? __kasan_slab_alloc+0x4d/0x90\n handler_chain+0xdd/0x3e0\n handle_swbp+0x26e/0x3d0\n ? __pfx_handle_swbp+0x10/0x10\n ? uprobe_pre_sstep_notifier+0x151/0x1b0\n irqentry_exit_to_user_mode+0xe2/0x1b0\n asm_exc_int3+0x39/0x40\nRIP: 0033:0x401199\nCode: 01 c2 0f b6 45 fb 88 02 83 45 fc 01 8b 45 fc 3b 45 e4 7c b7 8b 45 e4 48 98 48 8d 50 ff 48 8b 45 e8 48 01 d0 ce\nRSP: 002b:00007ffdf00576a8 EFLAGS: 00000206\nRAX: 00007ffdf00576b0 RBX: 0000000000000000 RCX: 0000000000000ff2\nRDX: 0000000000000ffc RSI: 0000000000000ffd RDI: 00007ffdf00576b0\nRBP: 00007ffdf00586b0 R08: 00007feb2f9c0d20 R09: 00007feb2f9c0d20\nR10: 0000000000000001 R11: 0000000000000202 R12: 0000000000401040\nR13: 00007ffdf0058780 R14: 0000000000000000 R15: 0000000000000000\n \n\nThis commit enforces the buffer's maxlen less than a page-size to avoid\nstore_trace_args() out-of-memory access.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "dcad1a204f72624796ae83359403898d10393b9c", "status": "affected", "versionType": "git", "lessThan": "0dc3ad9ad2188da7f090b3dbe4d2fcd9ae8ae64f" }, { "version": "dcad1a204f72624796ae83359403898d10393b9c", "status": "affected", "versionType": "git", "lessThan": "9e5f93788c9dd4309e75a56860a1ac44a8e117b9" }, { "version": "dcad1a204f72624796ae83359403898d10393b9c", "status": "affected", "versionType": "git", "lessThan": "537ad4a431f6dddbf15d40d19f24bb9ee12b55cb" }, { "version": "dcad1a204f72624796ae83359403898d10393b9c", "status": "affected", "versionType": "git", "lessThan": "373b9338c9722a368925d83bc622c596896b328e" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "3.14", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "3.14" }, { "version": "6.1.118", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.59", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.11.6", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.11.*" }, { "version": "6.12", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }