303 lines
17 KiB
JSON
303 lines
17 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2023-53489",
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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": "2025-10-01T11:39:39.403Z",
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"datePublished": "2025-10-01T11:45:41.304Z",
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"dateUpdated": "2026-11-05T20:31:11.838Z"
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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": "2026-05-11T19:45:58.719Z"
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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\ntcp/udp: Fix memleaks of sk and zerocopy skbs with TX timestamp.\n\nsyzkaller reported [0] memory leaks of an UDP socket and ZEROCOPY\nskbs. We can reproduce the problem with these sequences:\n\n sk = socket(AF_INET, SOCK_DGRAM, 0)\n sk.setsockopt(SOL_SOCKET, SO_TIMESTAMPING, SOF_TIMESTAMPING_TX_SOFTWARE)\n sk.setsockopt(SOL_SOCKET, SO_ZEROCOPY, 1)\n sk.sendto(b'', MSG_ZEROCOPY, ('127.0.0.1', 53))\n sk.close()\n\nsendmsg() calls msg_zerocopy_alloc(), which allocates a skb, sets\nskb->cb->ubuf.refcnt to 1, and calls sock_hold(). Here, struct\nubuf_info_msgzc indirectly holds a refcnt of the socket. When the\nskb is sent, __skb_tstamp_tx() clones it and puts the clone into\nthe socket's error queue with the TX timestamp.\n\nWhen the original skb is received locally, skb_copy_ubufs() calls\nskb_unclone(), and pskb_expand_head() increments skb->cb->ubuf.refcnt.\nThis additional count is decremented while freeing the skb, but struct\nubuf_info_msgzc still has a refcnt, so __msg_zerocopy_callback() is\nnot called.\n\nThe last refcnt is not released unless we retrieve the TX timestamped\nskb by recvmsg(). Since we clear the error queue in inet_sock_destruct()\nafter the socket's refcnt reaches 0, there is a circular dependency.\nIf we close() the socket holding such skbs, we never call sock_put()\nand leak the count, sk, and skb.\n\nTCP has the same problem, and commit e0c8bccd40fc (\"net: stream:\npurge sk_error_queue in sk_stream_kill_queues()\") tried to fix it\nby calling skb_queue_purge() during close(). However, there is a\nsmall chance that skb queued in a qdisc or device could be put\ninto the error queue after the skb_queue_purge() call.\n\nIn __skb_tstamp_tx(), the cloned skb should not have a reference\nto the ubuf to remove the circular dependency, but skb_clone() does\nnot call skb_copy_ubufs() for zerocopy skb. So, we need to call\nskb_orphan_frags_rx() for the cloned skb to call skb_copy_ubufs().\n\n[0]:\nBUG: memory leak\nunreferenced object 0xffff88800c6d2d00 (size 1152):\n comm \"syz-executor392\", pid 264, jiffies 4294785440 (age 13.044s)\n hex dump (first 32 bytes):\n 00 00 00 00 00 00 00 00 cd af e8 81 00 00 00 00 ................\n 02 00 07 40 00 00 00 00 00 00 00 00 00 00 00 00 ...@............\n backtrace:\n [<0000000055636812>] sk_prot_alloc+0x64/0x2a0 net/core/sock.c:2024\n [<0000000054d77b7a>] sk_alloc+0x3b/0x800 net/core/sock.c:2083\n [<0000000066f3c7e0>] inet_create net/ipv4/af_inet.c:319 [inline]\n [<0000000066f3c7e0>] inet_create+0x31e/0xe40 net/ipv4/af_inet.c:245\n [<000000009b83af97>] __sock_create+0x2ab/0x550 net/socket.c:1515\n [<00000000b9b11231>] sock_create net/socket.c:1566 [inline]\n [<00000000b9b11231>] __sys_socket_create net/socket.c:1603 [inline]\n [<00000000b9b11231>] __sys_socket_create net/socket.c:1588 [inline]\n [<00000000b9b11231>] __sys_socket+0x138/0x250 net/socket.c:1636\n [<000000004fb45142>] __do_sys_socket net/socket.c:1649 [inline]\n [<000000004fb45142>] __se_sys_socket net/socket.c:1647 [inline]\n [<000000004fb45142>] __x64_sys_socket+0x73/0xb0 net/socket.c:1647\n [<0000000066999e0e>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n [<0000000066999e0e>] do_syscall_64+0x38/0x90 arch/x86/entry/common.c:80\n [<0000000017f238c1>] entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nBUG: memory leak\nunreferenced object 0xffff888017633a00 (size 240):\n comm \"syz-executor392\", pid 264, jiffies 4294785440 (age 13.044s)\n hex dump (first 32 bytes):\n 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\n 00 00 00 00 00 00 00 00 00 2d 6d 0c 80 88 ff ff .........-m.....\n backtrace:\n [<000000002b1c4368>] __alloc_skb+0x229/0x320 net/core/skbuff.c:497\n [<00000000143579a6>] alloc_skb include/linux/skbuff.h:1265 [inline]\n [<00000000143579a6>] sock_omalloc+0xaa/0x190 net/core/sock.c:2596\n [<00000000be626478>] msg_zerocopy_alloc net/core/skbuff.c:1294 [inline]\n [<00000000be626478>]\n---truncated---"
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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/core/skbuff.c"
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],
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"versions": [
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{
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"version": "f214f915e7db99091f1312c48b30928c1e0c90b7",
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"lessThan": "281072fb2a7294cde7acbf5375b879f40a8001b7",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "f214f915e7db99091f1312c48b30928c1e0c90b7",
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"lessThan": "1f69c086b20e27763af28145981435423f088268",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "f214f915e7db99091f1312c48b30928c1e0c90b7",
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"lessThan": "602fa8af44fd55a58f9e94eb673e8adad2c6cc46",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "f214f915e7db99091f1312c48b30928c1e0c90b7",
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"lessThan": "230a5ed7d813fb516de81d23f09d7506753e41e9",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "f214f915e7db99091f1312c48b30928c1e0c90b7",
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"lessThan": "43e4197dd5f6b474a8b16f8b6a42cd45cf4f9d1a",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "f214f915e7db99091f1312c48b30928c1e0c90b7",
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"lessThan": "cb52e7f24c1d01a536a847dff0d1d95889cc3b5c",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "f214f915e7db99091f1312c48b30928c1e0c90b7",
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"lessThan": "30290f210ba7426ff7592fe2eb4114b1b5bad219",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "f214f915e7db99091f1312c48b30928c1e0c90b7",
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"lessThan": "426384dd4980040651536fef5feac4dcc4d7ee4e",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "f214f915e7db99091f1312c48b30928c1e0c90b7",
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"lessThan": "50749f2dd6854a41830996ad302aef2ffaf011d8",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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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/core/skbuff.c"
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],
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"versions": [
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{
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"version": "4.14",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "4.14",
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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": "4.14.315",
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"lessThanOrEqual": "4.14.*",
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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": "4.19.283",
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"lessThanOrEqual": "4.19.*",
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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": "5.4.243",
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"lessThanOrEqual": "5.4.*",
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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": "5.10.180",
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"lessThanOrEqual": "5.10.*",
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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": "5.15.111",
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"lessThanOrEqual": "5.15.*",
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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": "6.1.28",
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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": "6.2.15",
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"lessThanOrEqual": "6.2.*",
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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": "6.3.2",
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"lessThanOrEqual": "6.3.*",
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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": "6.4",
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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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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.14",
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"versionEndExcluding": "4.14.315"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "5.15.111"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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},
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"versionStartIncluding": "4.14",
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},
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/281072fb2a7294cde7acbf5375b879f40a8001b7"
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},
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{
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"url": "https://git.kernel.org/stable/c/1f69c086b20e27763af28145981435423f088268"
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},
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{
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"url": "https://git.kernel.org/stable/c/602fa8af44fd55a58f9e94eb673e8adad2c6cc46"
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},
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{
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"url": "https://git.kernel.org/stable/c/230a5ed7d813fb516de81d23f09d7506753e41e9"
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},
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{
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"url": "https://git.kernel.org/stable/c/43e4197dd5f6b474a8b16f8b6a42cd45cf4f9d1a"
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},
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{
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"url": "https://git.kernel.org/stable/c/cb52e7f24c1d01a536a847dff0d1d95889cc3b5c"
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},
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{
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"url": "https://git.kernel.org/stable/c/30290f210ba7426ff7592fe2eb4114b1b5bad219"
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},
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{
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"url": "https://git.kernel.org/stable/c/426384dd4980040651536fef5feac4dcc4d7ee4e"
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},
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{
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"url": "https://git.kernel.org/stable/c/50749f2dd6854a41830996ad302aef2ffaf011d8"
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}
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],
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"title": "tcp/udp: Fix memleaks of sk and zerocopy skbs with TX timestamp.",
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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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"metrics": [
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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-2023-53489",
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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": "partial"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-11-05T20:22:23.206424Z"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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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": "2026-11-05T20:31:11.838Z"
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}
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}
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]
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}
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} |