473 lines
26 KiB
JSON
473 lines
26 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"cveMetadata": {
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"cveId": "CVE-2024-35976",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-05-17T13:50:33.143Z",
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"datePublished": "2024-05-20T09:42:02.415Z",
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"dateUpdated": "2026-10-15T00:41:52.100Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T11:31:20.690Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: validate user input for XDP_{UMEM|COMPLETION}_FILL_RING\n\nsyzbot reported an illegal copy in xsk_setsockopt() [1]\n\nMake sure to validate setsockopt() @optlen parameter.\n\n[1]\n\n BUG: KASAN: slab-out-of-bounds in copy_from_sockptr_offset include/linux/sockptr.h:49 [inline]\n BUG: KASAN: slab-out-of-bounds in copy_from_sockptr include/linux/sockptr.h:55 [inline]\n BUG: KASAN: slab-out-of-bounds in xsk_setsockopt+0x909/0xa40 net/xdp/xsk.c:1420\nRead of size 4 at addr ffff888028c6cde3 by task syz-executor.0/7549\n\nCPU: 0 PID: 7549 Comm: syz-executor.0 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024\nCall Trace:\n <TASK>\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114\n print_address_description mm/kasan/report.c:377 [inline]\n print_report+0x169/0x550 mm/kasan/report.c:488\n kasan_report+0x143/0x180 mm/kasan/report.c:601\n copy_from_sockptr_offset include/linux/sockptr.h:49 [inline]\n copy_from_sockptr include/linux/sockptr.h:55 [inline]\n xsk_setsockopt+0x909/0xa40 net/xdp/xsk.c:1420\n do_sock_setsockopt+0x3af/0x720 net/socket.c:2311\n __sys_setsockopt+0x1ae/0x250 net/socket.c:2334\n __do_sys_setsockopt net/socket.c:2343 [inline]\n __se_sys_setsockopt net/socket.c:2340 [inline]\n __x64_sys_setsockopt+0xb5/0xd0 net/socket.c:2340\n do_syscall_64+0xfb/0x240\n entry_SYSCALL_64_after_hwframe+0x6d/0x75\nRIP: 0033:0x7fb40587de69\nCode: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 c7 c1 b0 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007fb40665a0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036\nRAX: ffffffffffffffda RBX: 00007fb4059abf80 RCX: 00007fb40587de69\nRDX: 0000000000000005 RSI: 000000000000011b RDI: 0000000000000006\nRBP: 00007fb4058ca47a R08: 0000000000000002 R09: 0000000000000000\nR10: 0000000020001980 R11: 0000000000000246 R12: 0000000000000000\nR13: 000000000000000b R14: 00007fb4059abf80 R15: 00007fff57ee4d08\n </TASK>\n\nAllocated by task 7549:\n kasan_save_stack mm/kasan/common.c:47 [inline]\n kasan_save_track+0x3f/0x80 mm/kasan/common.c:68\n poison_kmalloc_redzone mm/kasan/common.c:370 [inline]\n __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387\n kasan_kmalloc include/linux/kasan.h:211 [inline]\n __do_kmalloc_node mm/slub.c:3966 [inline]\n __kmalloc+0x233/0x4a0 mm/slub.c:3979\n kmalloc include/linux/slab.h:632 [inline]\n __cgroup_bpf_run_filter_setsockopt+0xd2f/0x1040 kernel/bpf/cgroup.c:1869\n do_sock_setsockopt+0x6b4/0x720 net/socket.c:2293\n __sys_setsockopt+0x1ae/0x250 net/socket.c:2334\n __do_sys_setsockopt net/socket.c:2343 [inline]\n __se_sys_setsockopt net/socket.c:2340 [inline]\n __x64_sys_setsockopt+0xb5/0xd0 net/socket.c:2340\n do_syscall_64+0xfb/0x240\n entry_SYSCALL_64_after_hwframe+0x6d/0x75\n\nThe buggy address belongs to the object at ffff888028c6cde0\n which belongs to the cache kmalloc-8 of size 8\nThe buggy address is located 1 bytes to the right of\n allocated 2-byte region [ffff888028c6cde0, ffff888028c6cde2)\n\nThe buggy address belongs to the physical page:\npage:ffffea0000a31b00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888028c6c9c0 pfn:0x28c6c\nanon flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff)\npage_type: 0xffffffff()\nraw: 00fff00000000800 ffff888014c41280 0000000000000000 dead000000000001\nraw: ffff888028c6c9c0 0000000080800057 00000001ffffffff 0000000000000000\npage dumped because: kasan: bad access detected\npage_owner tracks the page as allocated\npage last allocated via order 0, migratetype Unmovable, gfp_mask 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 6648, tgid 6644 (syz-executor.0), ts 133906047828, free_ts 133859922223\n set_page_owner include/linux/page_owner.h:31 [inline]\n post_alloc_hook+0x1ea/0x210 mm/page_alloc.c:1533\n prep_new_page mm/page_alloc.c:\n---truncated---"
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
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"baseScore": 7.1,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The vulnerability is reached purely through the local `setsockopt(2)` syscall on an AF_XDP socket; no network input is processed. There is no remote or adjacent-network trigger for `xsk_setsockopt()`.\nAC:L - A single deterministic `setsockopt(fd, SOL_XDP, XDP_UMEM_FILL_RING, buf, 2)` call triggers the over-read every time — no race, no memory-layout grooming, and no condition outside the attacker's control. The attacker fully controls the short `optlen` value that causes the unchecked 4-byte copy.\nPR:L - Creating the AF_XDP socket needs `ns_capable(net->user_ns, CAP_NET_RAW)`, which any unprivileged user obtains with `unshare -Urn`, and which containers (Docker's default set) grant outright. No real root in the initial namespace is required.\nUI:N - The attacker performs the entire sequence — socket creation and the malformed setsockopt — in its own process. No victim action, mount, or file open is needed.\nS:U - The over-read and its consequences stay within the kernel's own security authority on the same host. No VM, IOMMU, or sandbox boundary is crossed.\nC:H - The unchecked `memcpy()` reads kernel slab memory beyond the allocated object into `entries`, exposing uninitialized/adjacent heap residue that the attacker can subsequently observe via the resulting ring size through `xsk_mmap()`'s size validation. Out-of-bounds reads of kernel heap are scored High.\nI:N - The defect is strictly a read; no out-of-bounds write, type confusion, or control-flow corruption occurs. The `entries` value it influences is already fully attacker-supplied through the legitimate path, so no integrity is gained.\nA:H - The access is a KASAN-detected slab out-of-bounds read that produces a kernel splat and panics on builds running `panic_on_warn`, and the resulting garbage ring size drives failing large vmalloc allocations. Any such memory-safety violation is scored as a High availability impact."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/xdp/xsk.c"
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],
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{
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"version": "423f38329d267969130fb6f2c685f73d72687558",
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{
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{
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"net/xdp/xsk.c"
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],
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{
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"version": "0",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "4.19.317",
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"lessThanOrEqual": "4.19.*",
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"status": "unaffected",
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},
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{
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"version": "5.4.278",
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"lessThanOrEqual": "5.4.*",
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},
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{
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{
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},
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{
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"version": "6.1.87",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.28",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.8.7",
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"lessThanOrEqual": "6.8.*",
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"status": "unaffected",
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},
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{
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"version": "6.9",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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}
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"cpeApplicability": [
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{
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"url": "https://git.kernel.org/stable/c/2a523f14a3f53b46ff0e1fafd215b0bc5f6783aa"
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}
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],
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"title": "xsk: validate user input for XDP_{UMEM|COMPLETION}_FILL_RING",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"title": "CISA ADP Vulnrichment",
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"metrics": [
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{
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"cvssV3_1": {
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"scope": "UNCHANGED",
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"version": "3.1",
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"baseScore": 6.7,
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"baseSeverity": "MEDIUM",
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"vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
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"integrityImpact": "HIGH",
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"userInteraction": "NONE",
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"attackComplexity": "HIGH",
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"availabilityImpact": "NONE",
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"privilegesRequired": "NONE",
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"confidentialityImpact": "HIGH"
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}
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},
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2024-35976",
|
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2024-05-20T14:37:56.972231Z"
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}
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}
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}
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],
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"affected": [
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{
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"cpes": [
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"cpe:2.3:o:linux:linux_kernel:4.18:*:*:*:*:*:*:*"
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],
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"vendor": "linux",
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"product": "linux_kernel",
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"versions": [
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{
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"status": "affected",
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"version": "4.18"
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}
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],
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"defaultStatus": "unknown"
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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|
"lang": "en",
|
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"type": "CWE",
|
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"cweId": "CWE-787",
|
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"description": "CWE-787 Out-of-bounds Write"
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}
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]
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}
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],
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2024-06-04T17:34:07.661Z"
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}
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},
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{
|
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"title": "CVE Program Container",
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/beb99266830520e15fbc6ca8cc5a5240d76851fd",
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"tags": [
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"x_transferred"
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]
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{
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"url": "https://git.kernel.org/stable/c/0b45c25d60e38f5c2cb6823f886773a34323306d",
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"tags": [
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]
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},
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{
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"url": "https://git.kernel.org/stable/c/a82984b3c6a7e8c7937dba6e857ddf829d149417",
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"tags": [
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"x_transferred"
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]
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},
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{
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"url": "https://git.kernel.org/stable/c/f0a068de65d5b7358e9aff792716afa9333f3922",
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"tags": [
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