{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-50067", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-10-21T19:36:19.939Z", "datePublished": "2024-10-28T00:57:05.734Z", "dateUpdated": "2026-08-05T11:41:22.544Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:41:22.544Z" }, "descriptions": [ { "lang": "en", "value": "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." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The overflow is driven by a uprobe firing on a locally executing process, whose registers and user-space string data supply the oversized fetch arguments. No network or physical vector is involved; the attacker needs local code execution.\nAC:L - The traced process fully controls both the length and content of the fetched strings, so exceeding PAGE_SIZE is deterministic and repeatable — a single 4095-byte string already overflows, and the reporter supplies a trivial reproducer.\nPR:L - The out-of-bounds write is performed on behalf of the ordinary unprivileged process that hits the uprobe, using data it fully controls; the probe configuration is an environmental precondition of routine production tracing, not a privilege the attacker exercises. Some deployments also grant tracefs write access to a non-root tracing group.\nUI:N - The attacker triggers the bug by running the instrumented binary itself with long string arguments; no victim action is required as part of the attack.\nS:U - The corruption stays within the kernel's own security authority — standard local privilege escalation, with no VM, IOMMU, or sandbox boundary crossed.\nC:H - The perf path memcpy's up to ~4 KB beyond the per-CPU page into trace records, disclosing adjacent kernel memory, and the controlled OOB write is readily leveraged into an arbitrary-read primitive by corrupting neighboring kernel objects.\nI:H - This is an out-of-bounds write with attacker-chosen length and fully attacker-chosen bytes past a page-sized buffer, corrupting whatever adjacent buddy page holds (slab objects, page tables, stacks) — a direct path to control-flow hijack and privilege escalation.\nA:H - Smashing adjacent kernel pages with arbitrary user data reliably produces oopses and panics, as demonstrated by the KASAN splat in the fix commit, and the attacker can repeat it at will." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/trace/trace_uprobe.c" ], "versions": [ { "version": "dcad1a204f72624796ae83359403898d10393b9c", "lessThan": "0dc3ad9ad2188da7f090b3dbe4d2fcd9ae8ae64f", "status": "affected", "versionType": "git" }, { "version": "dcad1a204f72624796ae83359403898d10393b9c", "lessThan": "9e5f93788c9dd4309e75a56860a1ac44a8e117b9", "status": "affected", "versionType": "git" }, { "version": "dcad1a204f72624796ae83359403898d10393b9c", "lessThan": "537ad4a431f6dddbf15d40d19f24bb9ee12b55cb", "status": "affected", "versionType": "git" }, { "version": "dcad1a204f72624796ae83359403898d10393b9c", "lessThan": "373b9338c9722a368925d83bc622c596896b328e", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/trace/trace_uprobe.c" ], "versions": [ { "version": "3.14", "status": "affected" }, { "version": "0", "lessThan": "3.14", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.118", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.59", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.11.6", "lessThanOrEqual": "6.11.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.14", "versionEndExcluding": "6.1.118" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.14", "versionEndExcluding": "6.6.59" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.14", "versionEndExcluding": "6.11.6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.14", "versionEndExcluding": "6.12" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/0dc3ad9ad2188da7f090b3dbe4d2fcd9ae8ae64f" }, { "url": "https://git.kernel.org/stable/c/9e5f93788c9dd4309e75a56860a1ac44a8e117b9" }, { "url": "https://git.kernel.org/stable/c/537ad4a431f6dddbf15d40d19f24bb9ee12b55cb" }, { "url": "https://git.kernel.org/stable/c/373b9338c9722a368925d83bc622c596896b328e" } ], "title": "uprobe: avoid out-of-bounds memory access of fetching args", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2024-50067", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2024-12-11T14:49:09.097229Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-12-11T14:58:34.869Z" } }, { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T22:25:03.914Z" } } ] } }