CVE-2024-43910

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2024-43910", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-08-17T09:11:59.294Z", "datePublished": "2024-08-26T10:11:14.105Z", "dateUpdated": "2026-08-05T11:37:04.139Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:37:04.139Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: add missing check_func_arg_reg_off() to prevent out-of-bounds memory accesses\n\nCurrently, it's possible to pass in a modified CONST_PTR_TO_DYNPTR to\na global function as an argument. The adverse effects of this is that\nBPF helpers can continue to make use of this modified\nCONST_PTR_TO_DYNPTR from within the context of the global function,\nwhich can unintentionally result in out-of-bounds memory accesses and\ntherefore compromise overall system stability i.e.\n\n[ 244.157771] BUG: KASAN: slab-out-of-bounds in bpf_dynptr_data+0x137/0x140\n[ 244.161345] Read of size 8 at addr ffff88810914be68 by task test_progs/302\n[ 244.167151] CPU: 0 PID: 302 Comm: test_progs Tainted: G O E 6.10.0-rc3-00131-g66b586715063 #533\n[ 244.174318] Call Trace:\n[ 244.175787] <TASK>\n[ 244.177356] dump_stack_lvl+0x66/0xa0\n[ 244.179531] print_report+0xce/0x670\n[ 244.182314] ? __virt_addr_valid+0x200/0x3e0\n[ 244.184908] kasan_report+0xd7/0x110\n[ 244.187408] ? bpf_dynptr_data+0x137/0x140\n[ 244.189714] ? bpf_dynptr_data+0x137/0x140\n[ 244.192020] bpf_dynptr_data+0x137/0x140\n[ 244.194264] bpf_prog_b02a02fdd2bdc5fa_global_call_bpf_dynptr_data+0x22/0x26\n[ 244.198044] bpf_prog_b0fe7b9d7dc3abde_callback_adjust_bpf_dynptr_reg_off+0x1f/0x23\n[ 244.202136] bpf_user_ringbuf_drain+0x2c7/0x570\n[ 244.204744] ? 0xffffffffc0009e58\n[ 244.206593] ? __pfx_bpf_user_ringbuf_drain+0x10/0x10\n[ 244.209795] bpf_prog_33ab33f6a804ba2d_user_ringbuf_callback_const_ptr_to_dynptr_reg_off+0x47/0x4b\n[ 244.215922] bpf_trampoline_6442502480+0x43/0xe3\n[ 244.218691] __x64_sys_prlimit64+0x9/0xf0\n[ 244.220912] do_syscall_64+0xc1/0x1d0\n[ 244.223043] entry_SYSCALL_64_after_hwframe+0x77/0x7f\n[ 244.226458] RIP: 0033:0x7ffa3eb8f059\n[ 244.228582] Code: 08 89 e8 5b 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 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 8f 1d 0d 00 f7 d8 64 89 01 48\n[ 244.241307] RSP: 002b:00007ffa3e9c6eb8 EFLAGS: 00000206 ORIG_RAX: 000000000000012e\n[ 244.246474] RAX: ffffffffffffffda RBX: 00007ffa3e9c7cdc RCX: 00007ffa3eb8f059\n[ 244.250478] RDX: 00007ffa3eb162b4 RSI: 0000000000000000 RDI: 00007ffa3e9c7fb0\n[ 244.255396] RBP: 00007ffa3e9c6ed0 R08: 00007ffa3e9c76c0 R09: 0000000000000000\n[ 244.260195] R10: 0000000000000000 R11: 0000000000000206 R12: ffffffffffffff80\n[ 244.264201] R13: 000000000000001c R14: 00007ffc5d6b4260 R15: 00007ffa3e1c7000\n[ 244.268303] </TASK>\n\nAdd a check_func_arg_reg_off() to the path in which the BPF verifier\nverifies the arguments of global function arguments, specifically\nthose which take an argument of type ARG_PTR_TO_DYNPTR |\nMEM_RDONLY. Also, process_dynptr_func() doesn't appear to perform any\nexplicit and strict type matching on the supplied register type, so\nlet's also enforce that a register either type PTR_TO_STACK or\nCONST_PTR_TO_DYNPTR is by the caller."}], "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 only trigger is `BPF_BTF_LOAD` plus `BPF_PROG_LOAD` on the `bpf(2)` syscall followed by running the program; no remote or adjacent peer data reaches `btf_check_func_arg_match()`. This matches the standard BPF-subsystem classification of Local.\nAC:L - The attacker supplies the offset himself as a `BPF_ALU64_IMM(BPF_ADD, R1, K)` immediate, which `can_skip_alu_sanitation()` exempts from all speculative masking and `adjust_ptr_min_max_vals()` folds verbatim into `dst_reg->off`, so every precondition is chosen at program-authoring time. There is no race, no memory-layout luck, and no non-default config \u2014 global subprogs and dynptrs are ordinary CO-RE/libbpf features.\nPR:L - Reaching the path needs CAP_BPF, which is not root and which `bpf_token_capable()` deliberately grants at `ns_capable()` level through a delegated bpffs BPF token \u2014 a feature present throughout the affected 6.8\u20136.10 range \u2014 so an unprivileged user in a container or a non-root CAP_BPF service account qualifies. CAP_BPF is specifically not supposed to confer kernel memory access; the verifier is the boundary being broken here.\nUI:N - The attacker loads and triggers his own BPF program end to end via the `bpf(2)` syscall and a self-attached hook. No victim action of any kind is involved.\nS:U - The forged dynptr corrupts kernel memory within the same kernel security authority that the BPF program already runs under. No hypervisor, IOMMU, or other authority boundary is crossed.\nC:H - With `data`/`size`/`offset` read out of an attacker-placed fake `struct bpf_dynptr_kern`, `bpf_dynptr_read()` performs a `memcpy` from `ptr->data + ptr->offset` into the program's stack, yielding an arbitrary kernel read of up to the 24-bit size mask; the committed KASAN report is only the mildest manifestation.\nI:H - `bpf_dynptr_write()` takes `ARG_PTR_TO_DYNPTR | MEM_RDONLY` and so accepts the same forged pointer inside the subprog, reaching `memmove(dst->data + dst->offset + offset, src, len)` \u2014 an arbitrary kernel write, and `bpf_dynptr_data()` additionally hands back a `PTR_TO_MEM` slice at that address. That is a direct local privilege-escalation primitive.\nA:H - Even without exploitation, dereferencing `real_dynptr + K` for an arbitrary `s32` K reads a wild kernel address, producing the slab-out-of-bounds splat in the commit message and, for offsets into unmapped memory, an oops that panics the kernel."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/bpf/verifier.c"], "versions": [{"version": "a64bfe618665ea9c722f922cba8c6e3234eac5ac", "lessThan": "13663a7c644bf1dedaf461d07252db5d76c8759a", "status": "affected", "versionType": "git"}, {"version": "a64bfe618665ea9c722f922cba8c6e3234eac5ac", "lessThan": "ec2b9a5e11e51fea1bb04c1e7e471952e887e874", "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/bpf/verifier.c"], "versions": [{"version": "6.8", "status": "affected"}, {"version": "0", "lessThan": "6.8", "status": "unaffected", "versionType": "semver"}, {"version": "6.10.5", "lessThanOrEqual": "6.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.11", "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": "6.8", "versionEndExcluding": "6.10.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.11"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/13663a7c644bf1dedaf461d07252db5d76c8759a"}, {"url": "https://git.kernel.org/stable/c/ec2b9a5e11e51fea1bb04c1e7e471952e887e874"}], "title": "bpf: add missing check_func_arg_reg_off() to prevent out-of-bounds memory accesses", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-43910", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T15:28:19.098639Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-12T17:33:07.162Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-43910", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T15:28:19.098639Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T12:42:14.947Z"}}], "cna": {"title": "bpf: add missing check_func_arg_reg_off() to prevent out-of-bounds memory accesses", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "a64bfe618665ea9c722f922cba8c6e3234eac5ac", "lessThan": "13663a7c644bf1dedaf461d07252db5d76c8759a", "versionType": "git"}, {"status": "affected", "version": "a64bfe618665ea9c722f922cba8c6e3234eac5ac", "lessThan": "ec2b9a5e11e51fea1bb04c1e7e471952e887e874", "versionType": "git"}], "programFiles": ["kernel/bpf/verifier.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.8"}, {"status": "unaffected", "version": "0", "lessThan": "6.8", "versionType": "semver"}, {"status": "unaffected", "version": "6.10.5", "versionType": "semver", "lessThanOrEqual": "6.10.*"}, {"status": "unaffected", "version": "6.11", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["kernel/bpf/verifier.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/13663a7c644bf1dedaf461d07252db5d76c8759a"}, {"url": "https://git.kernel.org/stable/c/ec2b9a5e11e51fea1bb04c1e7e471952e887e874"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: add missing check_func_arg_reg_off() to prevent out-of-bounds memory accesses\n\nCurrently, it's possible to pass in a modified CONST_PTR_TO_DYNPTR to\na global function as an argument. The adverse effects of this is that\nBPF helpers can continue to make use of this modified\nCONST_PTR_TO_DYNPTR from within the context of the global function,\nwhich can unintentionally result in out-of-bounds memory accesses and\ntherefore compromise overall system stability i.e.\n\n[ 244.157771] BUG: KASAN: slab-out-of-bounds in bpf_dynptr_data+0x137/0x140\n[ 244.161345] Read of size 8 at addr ffff88810914be68 by task test_progs/302\n[ 244.167151] CPU: 0 PID: 302 Comm: test_progs Tainted: G O E 6.10.0-rc3-00131-g66b586715063 #533\n[ 244.174318] Call Trace:\n[ 244.175787] <TASK>\n[ 244.177356] dump_stack_lvl+0x66/0xa0\n[ 244.179531] print_report+0xce/0x670\n[ 244.182314] ? __virt_addr_valid+0x200/0x3e0\n[ 244.184908] kasan_report+0xd7/0x110\n[ 244.187408] ? bpf_dynptr_data+0x137/0x140\n[ 244.189714] ? bpf_dynptr_data+0x137/0x140\n[ 244.192020] bpf_dynptr_data+0x137/0x140\n[ 244.194264] bpf_prog_b02a02fdd2bdc5fa_global_call_bpf_dynptr_data+0x22/0x26\n[ 244.198044] bpf_prog_b0fe7b9d7dc3abde_callback_adjust_bpf_dynptr_reg_off+0x1f/0x23\n[ 244.202136] bpf_user_ringbuf_drain+0x2c7/0x570\n[ 244.204744] ? 0xffffffffc0009e58\n[ 244.206593] ? __pfx_bpf_user_ringbuf_drain+0x10/0x10\n[ 244.209795] bpf_prog_33ab33f6a804ba2d_user_ringbuf_callback_const_ptr_to_dynptr_reg_off+0x47/0x4b\n[ 244.215922] bpf_trampoline_6442502480+0x43/0xe3\n[ 244.218691] __x64_sys_prlimit64+0x9/0xf0\n[ 244.220912] do_syscall_64+0xc1/0x1d0\n[ 244.223043] entry_SYSCALL_64_after_hwframe+0x77/0x7f\n[ 244.226458] RIP: 0033:0x7ffa3eb8f059\n[ 244.228582] Code: 08 89 e8 5b 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 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 8f 1d 0d 00 f7 d8 64 89 01 48\n[ 244.241307] RSP: 002b:00007ffa3e9c6eb8 EFLAGS: 00000206 ORIG_RAX: 000000000000012e\n[ 244.246474] RAX: ffffffffffffffda RBX: 00007ffa3e9c7cdc RCX: 00007ffa3eb8f059\n[ 244.250478] RDX: 00007ffa3eb162b4 RSI: 0000000000000000 RDI: 00007ffa3e9c7fb0\n[ 244.255396] RBP: 00007ffa3e9c6ed0 R08: 00007ffa3e9c76c0 R09: 0000000000000000\n[ 244.260195] R10: 0000000000000000 R11: 0000000000000206 R12: ffffffffffffff80\n[ 244.264201] R13: 000000000000001c R14: 00007ffc5d6b4260 R15: 00007ffa3e1c7000\n[ 244.268303] </TASK>\n\nAdd a check_func_arg_reg_off() to the path in which the BPF verifier\nverifies the arguments of global function arguments, specifically\nthose which take an argument of type ARG_PTR_TO_DYNPTR |\nMEM_RDONLY. Also, process_dynptr_func() doesn't appear to perform any\nexplicit and strict type matching on the supplied register type, so\nlet's also enforce that a register either type PTR_TO_STACK or\nCONST_PTR_TO_DYNPTR is by the caller."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.10.5", "versionStartIncluding": "6.8"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.11", "versionStartIncluding": "6.8"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T20:32:08.384Z"}}}, "cveMetadata": {"cveId": "CVE-2024-43910", "state": "PUBLISHED", "dateUpdated": "2026-05-11T20:32:08.384Z", "dateReserved": "2024-08-17T09:11:59.294Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-08-26T10:11:14.105Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["kernel/bpf/verifier.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "13663a7c644bf1dedaf461d07252db5d76c8759a", "status": "affected", "version": "a64bfe618665ea9c722f922cba8c6e3234eac5ac", "versionType": "git"}, {"lessThan": "ec2b9a5e11e51fea1bb04c1e7e471952e887e874", "status": "affected", "version": "a64bfe618665ea9c722f922cba8c6e3234eac5ac", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["kernel/bpf/verifier.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.8"}, {"lessThan": "6.8", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.10.*", "status": "unaffected", "version": "6.10.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.11", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "48E239A0-A959-4FAB-8475-D045FED3DDA5", "versionEndExcluding": "6.10.5", "versionStartIncluding": "6.8", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: add missing check_func_arg_reg_off() to prevent out-of-bounds memory accesses\n\nCurrently, it's possible to pass in a modified CONST_PTR_TO_DYNPTR to\na global function as an argument. The adverse effects of this is that\nBPF helpers can continue to make use of this modified\nCONST_PTR_TO_DYNPTR from within the context of the global function,\nwhich can unintentionally result in out-of-bounds memory accesses and\ntherefore compromise overall system stability i.e.\n\n[ 244.157771] BUG: KASAN: slab-out-of-bounds in bpf_dynptr_data+0x137/0x140\n[ 244.161345] Read of size 8 at addr ffff88810914be68 by task test_progs/302\n[ 244.167151] CPU: 0 PID: 302 Comm: test_progs Tainted: G O E 6.10.0-rc3-00131-g66b586715063 #533\n[ 244.174318] Call Trace:\n[ 244.175787] <TASK>\n[ 244.177356] dump_stack_lvl+0x66/0xa0\n[ 244.179531] print_report+0xce/0x670\n[ 244.182314] ? __virt_addr_valid+0x200/0x3e0\n[ 244.184908] kasan_report+0xd7/0x110\n[ 244.187408] ? bpf_dynptr_data+0x137/0x140\n[ 244.189714] ? bpf_dynptr_data+0x137/0x140\n[ 244.192020] bpf_dynptr_data+0x137/0x140\n[ 244.194264] bpf_prog_b02a02fdd2bdc5fa_global_call_bpf_dynptr_data+0x22/0x26\n[ 244.198044] bpf_prog_b0fe7b9d7dc3abde_callback_adjust_bpf_dynptr_reg_off+0x1f/0x23\n[ 244.202136] bpf_user_ringbuf_drain+0x2c7/0x570\n[ 244.204744] ? 0xffffffffc0009e58\n[ 244.206593] ? __pfx_bpf_user_ringbuf_drain+0x10/0x10\n[ 244.209795] bpf_prog_33ab33f6a804ba2d_user_ringbuf_callback_const_ptr_to_dynptr_reg_off+0x47/0x4b\n[ 244.215922] bpf_trampoline_6442502480+0x43/0xe3\n[ 244.218691] __x64_sys_prlimit64+0x9/0xf0\n[ 244.220912] do_syscall_64+0xc1/0x1d0\n[ 244.223043] entry_SYSCALL_64_after_hwframe+0x77/0x7f\n[ 244.226458] RIP: 0033:0x7ffa3eb8f059\n[ 244.228582] Code: 08 89 e8 5b 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 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 8f 1d 0d 00 f7 d8 64 89 01 48\n[ 244.241307] RSP: 002b:00007ffa3e9c6eb8 EFLAGS: 00000206 ORIG_RAX: 000000000000012e\n[ 244.246474] RAX: ffffffffffffffda RBX: 00007ffa3e9c7cdc RCX: 00007ffa3eb8f059\n[ 244.250478] RDX: 00007ffa3eb162b4 RSI: 0000000000000000 RDI: 00007ffa3e9c7fb0\n[ 244.255396] RBP: 00007ffa3e9c6ed0 R08: 00007ffa3e9c76c0 R09: 0000000000000000\n[ 244.260195] R10: 0000000000000000 R11: 0000000000000206 R12: ffffffffffffff80\n[ 244.264201] R13: 000000000000001c R14: 00007ffc5d6b4260 R15: 00007ffa3e1c7000\n[ 244.268303] </TASK>\n\nAdd a check_func_arg_reg_off() to the path in which the BPF verifier\nverifies the arguments of global function arguments, specifically\nthose which take an argument of type ARG_PTR_TO_DYNPTR |\nMEM_RDONLY. Also, process_dynptr_func() doesn't appear to perform any\nexplicit and strict type matching on the supplied register type, so\nlet's also enforce that a register either type PTR_TO_STACK or\nCONST_PTR_TO_DYNPTR is by the caller."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bpf: agrega check_func_arg_reg_off() faltante para evitar accesos a memoria fuera de los l\u00edmites. Actualmente, es posible pasar un CONST_PTR_TO_DYNPTR modificado a una funci\u00f3n global como argumento. Los efectos adversos de esto es que los asistentes de BPF pueden continuar haciendo uso de este CONST_PTR_TO_DYNPTR modificado desde dentro del contexto de la funci\u00f3n global, lo que puede resultar involuntariamente en accesos a la memoria fuera de los l\u00edmites y, por lo tanto, comprometer la estabilidad general del sistema, es decir, [244.157771] ERROR : KASAN: losa fuera de los l\u00edmites en bpf_dynptr_data+0x137/0x140 [244.161345] Lectura de tama\u00f1o 8 en la direcci\u00f3n ffff88810914be68 por tarea test_progs/302 [244.167151] CPU: 0 PID: 302 Comm: test_progs Contaminado: GOE 6.10.0- rc3-00131-g66b586715063 #533 [244.174318] Seguimiento de llamadas: [244.175787] [244.177356] dump_stack_lvl+0x66/0xa0 [244.179531] print_report+0xce/0x670 [244. 182314] ? __virt_addr_valid+0x200/0x3e0 [ 244.184908] kasan_report+0xd7/0x110 [ 244.187408] ? bpf_dynptr_data+0x137/0x140 [244.189714]? bpf_dynptr_data+0x137/0x140 [ 244.192020] bpf_dynptr_data+0x137/0x140 [ 244.194264] bpf_prog_b02a02fdd2bdc5fa_global_call_bpf_dynptr_data+0x22/0x26 [ 244. 198044] bpf_prog_b0fe7b9d7dc3abde_callback_adjust_bpf_dynptr_reg_off+0x1f/0x23 [ 244.202136] bpf_user_ringbuf_drain+0x2c7/0x570 [ 244.204744] ? 0xffffffffc0009e58 [244.206593]? __pfx_bpf_user_ringbuf_drain+0x10/0x10 [ 244.209795] bpf_prog_33ab33f6a804ba2d_user_ringbuf_callback_const_ptr_to_dynptr_reg_off+0x47/0x4b [ 244.215922] 2502480+0x43/0xe3 [ 244.218691] __x64_sys_prlimit64+0x9/0xf0 [ 244.220912] do_syscall_64+0xc1/0x1d0 [ 244.223043] Entry_SYSCALL_64_after_hwframe+0x77/0x7f [244.226458] QEPD: 0033:0x7ffa3eb8f059 [ 244.228582] C\u00f3digo: 08 89 e8 5b 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 89 c2 d 89 c8 4c 8b 4c 24 08 0f 05 &lt;48&gt; 3d 01 f0 ff ff 73 01 c3 48 8b 0d 8f 1d 0d 00 f7 d8 64 89 01 48 [ 244.241307] RSP: 002b:00007ffa3e9c6eb8 EFLAGS: 00000206 ORIG_RAX: 0000000012e [ 244.246474] RAX: ffffffffffffffda RBX: 00007ffa3e9c7cdc RCX: 00007ffa3eb8f059 [ 244.250478] RDX: 00007ffa3eb162b4 RSI: 0000000000000000 RDI: 00007ffa3e9c7fb0 [ 244.255396] RBP: 00007ffa3e9c6ed0 R08: 00007ffa3e9c76c0 R 09: 0000000000000000 [ 244.260195] R10: 0000000000000000 R11: 0000000000000206 R12: ffffffffffffff80 [ 244.264201] R13: 000000000000001c R 14: 00007ffc5d6b4260 R15: 00007ffa3e1c7000 [ 244.268303 ] Agregue un check_func_arg_reg_off() a la ruta en la que el verificador BPF verifica los argumentos de las funciones globales, espec\u00edficamente aquellos que toman un argumento de tipo ARG_PTR_TO_DYNPTR | MEM_RDONLY. Adem\u00e1s, Process_dynptr_func() no parece realizar ninguna coincidencia de tipos expl\u00edcita y estricta en el tipo de registro proporcionado, por lo que tambi\u00e9n hagamos cumplir que un registro del tipo PTR_TO_STACK o CONST_PTR_TO_DYNPTR est\u00e9 a cargo de la persona que llama."}], "id": "CVE-2024-43910", "lastModified": "2026-08-04T11:19:59.747", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-43910", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-09-10T15:28:19.098639Z", "version": "2.0.3"}}]}, "published": "2024-08-26T11:15:05.177", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/13663a7c644bf1dedaf461d07252db5d76c8759a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ec2b9a5e11e51fea1bb04c1e7e471952e887e874"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-787"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2025:6966", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-570.12.1.el9_6", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-05-13T00:00:00Z"}, {"advisory": "RHSA-2025:6966", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-570.12.1.el9_6", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-05-13T00:00:00Z"}], "bugzilla": {"description": "kernel: bpf: add missing check_func_arg_reg_off() to prevent out-of-bounds memory accesses", "id": "2307883", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2307883"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.1", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H", "status": "verified"}, "cwe": "CWE-787", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nbpf: add missing check_func_arg_reg_off() to prevent out-of-bounds memory accesses\nCurrently, it's possible to pass in a modified CONST_PTR_TO_DYNPTR to\na global function as an argument. The adverse effects of this is that\nBPF helpers can continue to make use of this modified\nCONST_PTR_TO_DYNPTR from within the context of the global function,\nwhich can unintentionally result in out-of-bounds memory accesses and\ntherefore compromise overall system stability i.e.\n[ 244.157771] BUG: KASAN: slab-out-of-bounds in bpf_dynptr_data+0x137/0x140\n[ 244.161345] Read of size 8 at addr ffff88810914be68 by task test_progs/302\n[ 244.167151] CPU: 0 PID: 302 Comm: test_progs Tainted: G O E 6.10.0-rc3-00131-g66b586715063 #533\n[ 244.174318] Call Trace:\n[ 244.175787] <TASK>\n[ 244.177356] dump_stack_lvl+0x66/0xa0\n[ 244.179531] print_report+0xce/0x670\n[ 244.182314] ? __virt_addr_valid+0x200/0x3e0\n[ 244.184908] kasan_report+0xd7/0x110\n[ 244.187408] ? bpf_dynptr_data+0x137/0x140\n[ 244.189714] ? bpf_dynptr_data+0x137/0x140\n[ 244.192020] bpf_dynptr_data+0x137/0x140\n[ 244.194264] bpf_prog_b02a02fdd2bdc5fa_global_call_bpf_dynptr_data+0x22/0x26\n[ 244.198044] bpf_prog_b0fe7b9d7dc3abde_callback_adjust_bpf_dynptr_reg_off+0x1f/0x23\n[ 244.202136] bpf_user_ringbuf_drain+0x2c7/0x570\n[ 244.204744] ? 0xffffffffc0009e58\n[ 244.206593] ? __pfx_bpf_user_ringbuf_drain+0x10/0x10\n[ 244.209795] bpf_prog_33ab33f6a804ba2d_user_ringbuf_callback_const_ptr_to_dynptr_reg_off+0x47/0x4b\n[ 244.215922] bpf_trampoline_6442502480+0x43/0xe3\n[ 244.218691] __x64_sys_prlimit64+0x9/0xf0\n[ 244.220912] do_syscall_64+0xc1/0x1d0\n[ 244.223043] entry_SYSCALL_64_after_hwframe+0x77/0x7f\n[ 244.226458] RIP: 0033:0x7ffa3eb8f059\n[ 244.228582] Code: 08 89 e8 5b 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 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 8f 1d 0d 00 f7 d8 64 89 01 48\n[ 244.241307] RSP: 002b:00007ffa3e9c6eb8 EFLAGS: 00000206 ORIG_RAX: 000000000000012e\n[ 244.246474] RAX: ffffffffffffffda RBX: 00007ffa3e9c7cdc RCX: 00007ffa3eb8f059\n[ 244.250478] RDX: 00007ffa3eb162b4 RSI: 0000000000000000 RDI: 00007ffa3e9c7fb0\n[ 244.255396] RBP: 00007ffa3e9c6ed0 R08: 00007ffa3e9c76c0 R09: 0000000000000000\n[ 244.260195] R10: 0000000000000000 R11: 0000000000000206 R12: ffffffffffffff80\n[ 244.264201] R13: 000000000000001c R14: 00007ffc5d6b4260 R15: 00007ffa3e1c7000\n[ 244.268303] </TASK>\nAdd a check_func_arg_reg_off() to the path in which the BPF verifier\nverifies the arguments of global function arguments, specifically\nthose which take an argument of type ARG_PTR_TO_DYNPTR |\nMEM_RDONLY. Also, process_dynptr_func() doesn't appear to perform any\nexplicit and strict type matching on the supplied register type, so\nlet's also enforce that a register either type PTR_TO_STACK or\nCONST_PTR_TO_DYNPTR is by the caller."], "name": "CVE-2024-43910", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Will not fix", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-08-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-43910\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-43910\nhttps://lore.kernel.org/linux-cve-announce/2024082630-CVE-2024-43910-c6ec@gregkh/T"], "threat_severity": "Moderate"}

{}