cve-2022-49871
Vulnerability from cvelistv5
Published
2025-05-01 14:10
Modified
2025-05-04 08:47
Severity ?
EPSS score ?
Summary
net: tun: Fix memory leaks of napi_get_frags
References
{
"containers": {
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: tun: Fix memory leaks of napi_get_frags\n\nkmemleak reports after running test_progs:\n\nunreferenced object 0xffff8881b1672dc0 (size 232):\n comm \"test_progs\", pid 394388, jiffies 4354712116 (age 841.975s)\n hex dump (first 32 bytes):\n e0 84 d7 a8 81 88 ff ff 80 2c 67 b1 81 88 ff ff .........,g.....\n 00 40 c5 9b 81 88 ff ff 00 00 00 00 00 00 00 00 .@..............\n backtrace:\n [\u003c00000000c8f01748\u003e] napi_skb_cache_get+0xd4/0x150\n [\u003c0000000041c7fc09\u003e] __napi_build_skb+0x15/0x50\n [\u003c00000000431c7079\u003e] __napi_alloc_skb+0x26e/0x540\n [\u003c000000003ecfa30e\u003e] napi_get_frags+0x59/0x140\n [\u003c0000000099b2199e\u003e] tun_get_user+0x183d/0x3bb0 [tun]\n [\u003c000000008a5adef0\u003e] tun_chr_write_iter+0xc0/0x1b1 [tun]\n [\u003c0000000049993ff4\u003e] do_iter_readv_writev+0x19f/0x320\n [\u003c000000008f338ea2\u003e] do_iter_write+0x135/0x630\n [\u003c000000008a3377a4\u003e] vfs_writev+0x12e/0x440\n [\u003c00000000a6b5639a\u003e] do_writev+0x104/0x280\n [\u003c00000000ccf065d8\u003e] do_syscall_64+0x3b/0x90\n [\u003c00000000d776e329\u003e] entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nThe issue occurs in the following scenarios:\ntun_get_user()\n napi_gro_frags()\n napi_frags_finish()\n case GRO_NORMAL:\n gro_normal_one()\n list_add_tail(\u0026skb-\u003elist, \u0026napi-\u003erx_list);\n \u003c-- While napi-\u003erx_count \u003c READ_ONCE(gro_normal_batch),\n \u003c-- gro_normal_list() is not called, napi-\u003erx_list is not empty\n \u003c-- not ask to complete the gro work, will cause memory leaks in\n \u003c-- following tun_napi_del()\n...\ntun_napi_del()\n netif_napi_del()\n __netif_napi_del()\n \u003c-- \u0026napi-\u003erx_list is not empty, which caused memory leaks\n\nTo fix, add napi_complete() after napi_gro_frags()."
}
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"providerMetadata": {
"dateUpdated": "2025-05-04T08:47:23.635Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
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"references": [
{
"url": "https://git.kernel.org/stable/c/223ef6a94e52331a6a7ef31e59921e0e82d2d40a"
},
{
"url": "https://git.kernel.org/stable/c/a4f73f6adc53fd7a3f9771cbc89a03ef39b0b755"
},
{
"url": "https://git.kernel.org/stable/c/3401f964028ac941425b9b2c8ff8a022539ef44a"
},
{
"url": "https://git.kernel.org/stable/c/d7569302a7a52a9305d2fb054df908ff985553bb"
},
{
"url": "https://git.kernel.org/stable/c/8b12a020b20a78f62bedc50f26db3bf4fadf8cb9"
},
{
"url": "https://git.kernel.org/stable/c/1118b2049d77ca0b505775fc1a8d1909cf19a7ec"
}
],
"title": "net: tun: Fix memory leaks of napi_get_frags",
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"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2022-49871",
"datePublished": "2025-05-01T14:10:21.760Z",
"dateReserved": "2025-05-01T14:05:17.238Z",
"dateUpdated": "2025-05-04T08:47:23.635Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2022-49871\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-05-01T15:16:12.030\",\"lastModified\":\"2025-05-07T13:22:01.837\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: tun: Fix memory leaks of napi_get_frags\\n\\nkmemleak reports after running test_progs:\\n\\nunreferenced object 0xffff8881b1672dc0 (size 232):\\n comm \\\"test_progs\\\", pid 394388, jiffies 4354712116 (age 841.975s)\\n hex dump (first 32 bytes):\\n e0 84 d7 a8 81 88 ff ff 80 2c 67 b1 81 88 ff ff .........,g.....\\n 00 40 c5 9b 81 88 ff ff 00 00 00 00 00 00 00 00 .@..............\\n backtrace:\\n [\u003c00000000c8f01748\u003e] napi_skb_cache_get+0xd4/0x150\\n [\u003c0000000041c7fc09\u003e] __napi_build_skb+0x15/0x50\\n [\u003c00000000431c7079\u003e] __napi_alloc_skb+0x26e/0x540\\n [\u003c000000003ecfa30e\u003e] napi_get_frags+0x59/0x140\\n [\u003c0000000099b2199e\u003e] tun_get_user+0x183d/0x3bb0 [tun]\\n [\u003c000000008a5adef0\u003e] tun_chr_write_iter+0xc0/0x1b1 [tun]\\n [\u003c0000000049993ff4\u003e] do_iter_readv_writev+0x19f/0x320\\n [\u003c000000008f338ea2\u003e] do_iter_write+0x135/0x630\\n [\u003c000000008a3377a4\u003e] vfs_writev+0x12e/0x440\\n [\u003c00000000a6b5639a\u003e] do_writev+0x104/0x280\\n [\u003c00000000ccf065d8\u003e] do_syscall_64+0x3b/0x90\\n [\u003c00000000d776e329\u003e] entry_SYSCALL_64_after_hwframe+0x63/0xcd\\n\\nThe issue occurs in the following scenarios:\\ntun_get_user()\\n napi_gro_frags()\\n napi_frags_finish()\\n case GRO_NORMAL:\\n gro_normal_one()\\n list_add_tail(\u0026skb-\u003elist, \u0026napi-\u003erx_list);\\n \u003c-- While napi-\u003erx_count \u003c READ_ONCE(gro_normal_batch),\\n \u003c-- gro_normal_list() is not called, napi-\u003erx_list is not empty\\n \u003c-- not ask to complete the gro work, will cause memory leaks in\\n \u003c-- following tun_napi_del()\\n...\\ntun_napi_del()\\n netif_napi_del()\\n __netif_napi_del()\\n \u003c-- \u0026napi-\u003erx_list is not empty, which caused memory leaks\\n\\nTo fix, add napi_complete() after napi_gro_frags().\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: tun: Se corrigen las fugas de memoria de napi_get_frags que informa kmemleak tras ejecutar test_progs: objeto sin referencia 0xffff8881b1672dc0 (tama\u00f1o 232): comm \\\"test_progs\\\", pid 394388, jiffies 4354712116 (edad 841,975 s) volcado hexadecimal (primeros 32 bytes): e0 84 d7 a8 81 88 ff ff 80 2c 67 b1 81 88 ff ff .........,g..... 00 40 c5 9b 81 88 ff ff 00 00 00 00 00 00 00 00 .@.............. backtrace: [\u0026lt;00000000c8f01748\u0026gt;] napi_skb_cache_get+0xd4/0x150 [\u0026lt;0000000041c7fc09\u0026gt;] __napi_build_skb+0x15/0x50 [\u0026lt;00000000431c7079\u0026gt;] __napi_alloc_skb+0x26e/0x540 [\u0026lt;000000003ecfa30e\u0026gt;] napi_get_frags+0x59/0x140 [\u0026lt;0000000099b2199e\u0026gt;] tun_get_user+0x183d/0x3bb0 [tun] [\u0026lt;000000008a5adef0\u0026gt;] tun_chr_write_iter+0xc0/0x1b1 [tun] El problema ocurre en los siguientes escenarios: tun_get_user() napi_gro_frags() napi_frags_finish() caso GRO_NORMAL: gro_normal_one() list_add_tail(\u0026amp;skb-\u0026gt;list, \u0026amp;napi-\u0026gt;rx_list); \u0026lt;-- Mientras napi-\u0026gt;rx_count \u0026lt; READ_ONCE(gro_normal_batch), \u0026lt;-- gro_normal_list() no se llama, napi-\u0026gt;rx_list no est\u00e1 vac\u00edo \u0026lt;-- no solicita completar el trabajo de gro, causar\u00e1 p\u00e9rdidas de memoria en \u0026lt;-- siguientes tun_napi_del() ... tun_napi_del() netif_napi_del() __netif_napi_del() \u0026lt;-- \u0026amp;napi-\u0026gt;rx_list no est\u00e1 vac\u00edo, lo que caus\u00f3 p\u00e9rdidas de memoria Para corregirlo, agregue napi_complete() despu\u00e9s de napi_gro_frags().\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-401\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.15\",\"versionEndExcluding\":\"4.19.267\",\"matchCriteriaId\":\"A5C69A12-68E2-400E-9A5A-375A673C8402\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.20\",\"versionEndExcluding\":\"5.4.225\",\"matchCriteriaId\":\"94D21814-3051-4860-AB06-C7880A3D4933\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.155\",\"matchCriteriaId\":\"172AC75C-0949-4468-9C58-64E2893EF0CE\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.79\",\"matchCriteriaId\":\"39DC45D8-E30E-4F4A-9332-393B7BCF6900\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.0.9\",\"matchCriteriaId\":\"C3F26709-7D49-4AF0-8145-46CCF4E8E2AD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"E7E331DA-1FB0-4DEC-91AC-7DA69D461C11\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"17F0B248-42CF-4AE6-A469-BB1BAE7F4705\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"E2422816-0C14-4B5E-A1E6-A9D776E5C49B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.1:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"1C6E00FE-5FB9-4D20-A1A1-5A32128F9B76\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1118b2049d77ca0b505775fc1a8d1909cf19a7ec\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/223ef6a94e52331a6a7ef31e59921e0e82d2d40a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/3401f964028ac941425b9b2c8ff8a022539ef44a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/8b12a020b20a78f62bedc50f26db3bf4fadf8cb9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/a4f73f6adc53fd7a3f9771cbc89a03ef39b0b755\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d7569302a7a52a9305d2fb054df908ff985553bb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
}
}
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- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.