143 lines
7.4 KiB
JSON
143 lines
7.4 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-2026-23072",
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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": "2026-01-13T15:37:45.957Z",
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"datePublished": "2026-02-04T16:07:52.790Z",
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"dateUpdated": "2026-05-11T21:59:27.431Z"
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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": "2026-05-11T21:59:27.431Z"
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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\nl2tp: Fix memleak in l2tp_udp_encap_recv().\n\nsyzbot reported memleak of struct l2tp_session, l2tp_tunnel,\nsock, etc. [0]\n\nThe cited commit moved down the validation of the protocol\nversion in l2tp_udp_encap_recv().\n\nThe new place requires an extra error handling to avoid the\nmemleak.\n\nLet's call l2tp_session_put() there.\n\n[0]:\nBUG: memory leak\nunreferenced object 0xffff88810a290200 (size 512):\n comm \"syz.0.17\", pid 6086, jiffies 4294944299\n hex dump (first 32 bytes):\n 7d eb 04 0c 00 00 00 00 01 00 00 00 00 00 00 00 }...............\n 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\n backtrace (crc babb6a4f):\n kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]\n slab_post_alloc_hook mm/slub.c:4958 [inline]\n slab_alloc_node mm/slub.c:5263 [inline]\n __do_kmalloc_node mm/slub.c:5656 [inline]\n __kmalloc_noprof+0x3e0/0x660 mm/slub.c:5669\n kmalloc_noprof include/linux/slab.h:961 [inline]\n kzalloc_noprof include/linux/slab.h:1094 [inline]\n l2tp_session_create+0x3a/0x3b0 net/l2tp/l2tp_core.c:1778\n pppol2tp_connect+0x48b/0x920 net/l2tp/l2tp_ppp.c:755\n __sys_connect_file+0x7a/0xb0 net/socket.c:2089\n __sys_connect+0xde/0x110 net/socket.c:2108\n __do_sys_connect net/socket.c:2114 [inline]\n __se_sys_connect net/socket.c:2111 [inline]\n __x64_sys_connect+0x1c/0x30 net/socket.c:2111\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0xa4/0xf80 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f"
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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/l2tp/l2tp_core.c"
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],
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"versions": [
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{
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"version": "364798056f518b0bf2f17cd9eaf0dd4e856d7393",
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"lessThan": "5cd158a88eef34e7b100cd9b963873d3b4e41b35",
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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": "364798056f518b0bf2f17cd9eaf0dd4e856d7393",
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"lessThan": "d4ce79e6dce2a4a49eebceea7b4caf5dc0f0ef3d",
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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": "364798056f518b0bf2f17cd9eaf0dd4e856d7393",
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"lessThan": "4d10edfd1475b69dbd4c47f34b61a3772ece83ca",
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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/l2tp/l2tp_core.c"
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],
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"versions": [
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{
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"version": "6.10",
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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": "6.10",
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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": "6.12.68",
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"lessThanOrEqual": "6.12.*",
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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": "6.18.8",
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"lessThanOrEqual": "6.18.*",
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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": "6.19",
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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": "6.10",
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"versionEndExcluding": "6.12.68"
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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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"versionStartIncluding": "6.10",
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"versionEndExcluding": "6.18.8"
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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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"versionStartIncluding": "6.10",
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"versionEndExcluding": "6.19"
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}
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]
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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/5cd158a88eef34e7b100cd9b963873d3b4e41b35"
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},
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{
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"url": "https://git.kernel.org/stable/c/d4ce79e6dce2a4a49eebceea7b4caf5dc0f0ef3d"
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},
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{
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"url": "https://git.kernel.org/stable/c/4d10edfd1475b69dbd4c47f34b61a3772ece83ca"
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}
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],
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"title": "l2tp: Fix memleak in l2tp_udp_encap_recv().",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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} |