{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-50069", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-06-18T10:57:27.406Z", "datePublished": "2025-06-18T11:02:14.440Z", "dateUpdated": "2026-05-11T19:12:15.808Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T19:12:15.808Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBPF: Fix potential bad pointer dereference in bpf_sys_bpf()\n\nThe bpf_sys_bpf() helper function allows an eBPF program to load another\neBPF program from within the kernel. In this case the argument union\nbpf_attr pointer (as well as the insns and license pointers inside) is a\nkernel address instead of a userspace address (which is the case of a\nusual bpf() syscall). To make the memory copying process in the syscall\nwork in both cases, bpfptr_t was introduced to wrap around the pointer\nand distinguish its origin. Specifically, when copying memory contents\nfrom a bpfptr_t, a copy_from_user() is performed in case of a userspace\naddress and a memcpy() is performed for a kernel address.\n\nThis can lead to problems because the in-kernel pointer is never checked\nfor validity. The problem happens when an eBPF syscall program tries to\ncall bpf_sys_bpf() to load a program but provides a bad insns pointer --\nsay 0xdeadbeef -- in the bpf_attr union. The helper calls __sys_bpf()\nwhich would then call bpf_prog_load() to load the program.\nbpf_prog_load() is responsible for copying the eBPF instructions to the\nnewly allocated memory for the program; it creates a kernel bpfptr_t for\ninsns and invokes copy_from_bpfptr(). Internally, all bpfptr_t\noperations are backed by the corresponding sockptr_t operations, which\nperforms direct memcpy() on kernel pointers for copy_from/strncpy_from\noperations. Therefore, the code is always happy to dereference the bad\npointer to trigger a un-handle-able page fault and in turn an oops.\nHowever, this is not supposed to happen because at that point the eBPF\nprogram is already verified and should not cause a memory error.\n\nSample KASAN trace:\n\n[ 25.685056][ T228] ==================================================================\n[ 25.685680][ T228] BUG: KASAN: user-memory-access in copy_from_bpfptr+0x21/0x30\n[ 25.686210][ T228] Read of size 80 at addr 00000000deadbeef by task poc/228\n[ 25.686732][ T228]\n[ 25.686893][ T228] CPU: 3 PID: 228 Comm: poc Not tainted 5.19.0-rc7 #7\n[ 25.687375][ T228] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS d55cb5a 04/01/2014\n[ 25.687991][ T228] Call Trace:\n[ 25.688223][ T228] \n[ 25.688429][ T228] dump_stack_lvl+0x73/0x9e\n[ 25.688747][ T228] print_report+0xea/0x200\n[ 25.689061][ T228] ? copy_from_bpfptr+0x21/0x30\n[ 25.689401][ T228] ? _printk+0x54/0x6e\n[ 25.689693][ T228] ? _raw_spin_lock_irqsave+0x70/0xd0\n[ 25.690071][ T228] ? copy_from_bpfptr+0x21/0x30\n[ 25.690412][ T228] kasan_report+0xb5/0xe0\n[ 25.690716][ T228] ? copy_from_bpfptr+0x21/0x30\n[ 25.691059][ T228] kasan_check_range+0x2bd/0x2e0\n[ 25.691405][ T228] ? copy_from_bpfptr+0x21/0x30\n[ 25.691734][ T228] memcpy+0x25/0x60\n[ 25.692000][ T228] copy_from_bpfptr+0x21/0x30\n[ 25.692328][ T228] bpf_prog_load+0x604/0x9e0\n[ 25.692653][ T228] ? cap_capable+0xb4/0xe0\n[ 25.692956][ T228] ? security_capable+0x4f/0x70\n[ 25.693324][ T228] __sys_bpf+0x3af/0x580\n[ 25.693635][ T228] bpf_sys_bpf+0x45/0x240\n[ 25.693937][ T228] bpf_prog_f0ec79a5a3caca46_bpf_func1+0xa2/0xbd\n[ 25.694394][ T228] bpf_prog_run_pin_on_cpu+0x2f/0xb0\n[ 25.694756][ T228] bpf_prog_test_run_syscall+0x146/0x1c0\n[ 25.695144][ T228] bpf_prog_test_run+0x172/0x190\n[ 25.695487][ T228] __sys_bpf+0x2c5/0x580\n[ 25.695776][ T228] __x64_sys_bpf+0x3a/0x50\n[ 25.696084][ T228] do_syscall_64+0x60/0x90\n[ 25.696393][ T228] ? fpregs_assert_state_consistent+0x50/0x60\n[ 25.696815][ T228] ? exit_to_user_mode_prepare+0x36/0xa0\n[ 25.697202][ T228] ? syscall_exit_to_user_mode+0x20/0x40\n[ 25.697586][ T228] ? do_syscall_64+0x6e/0x90\n[ 25.697899][ T228] entry_SYSCALL_64_after_hwframe+0x63/0xcd\n[ 25.698312][ T228] RIP: 0033:0x7f6d543fb759\n[ 25.698624][ T228] Code: 08 5b 89 e8 5d c3 66 2e 0f 1f 84 00 00 00 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d \n---truncated---" } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "include/linux/bpfptr.h" ], "versions": [ { "version": "af2ac3e13e45752af03c8a933f9b6e18841b128b", "lessThan": "41fd6cc88aaf7058b9dfc9c7a09cc80f99c8c830", "status": "affected", "versionType": "git" }, { "version": "af2ac3e13e45752af03c8a933f9b6e18841b128b", "lessThan": "1f6db7148ed7382b336c5827af33b5d9e992630e", "status": "affected", "versionType": "git" }, { "version": "af2ac3e13e45752af03c8a933f9b6e18841b128b", "lessThan": "e2dcac2f58f5a95ab092d1da237ffdc0da1832cf", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "include/linux/bpfptr.h" ], "versions": [ { "version": "5.14", "status": "affected" }, { "version": "0", "lessThan": "5.14", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.63", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.19.4", "lessThanOrEqual": "5.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.0", "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": "5.14", "versionEndExcluding": "5.15.63" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "5.19.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "6.0" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/41fd6cc88aaf7058b9dfc9c7a09cc80f99c8c830" }, { "url": "https://git.kernel.org/stable/c/1f6db7148ed7382b336c5827af33b5d9e992630e" }, { "url": "https://git.kernel.org/stable/c/e2dcac2f58f5a95ab092d1da237ffdc0da1832cf" } ], "title": "BPF: Fix potential bad pointer dereference in bpf_sys_bpf()", "x_generator": { "engine": "bippy-1.2.0" } } } }