CVE-2022-49450

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://git.kernel.org/stable/c/369de57492c4f1a42563c5a3bd365822ca3bfc79", "name": "https://git.kernel.org/stable/c/369de57492c4f1a42563c5a3bd365822ca3bfc79", "tags": ["Patch"], "refsource": ""}, {"url": "https://git.kernel.org/stable/c/4a3a78b7918bdd723d8c7c9786522ca969bffcc4", "name": "https://git.kernel.org/stable/c/4a3a78b7918bdd723d8c7c9786522ca969bffcc4", "tags": ["Patch"], "refsource": ""}, {"url": "https://git.kernel.org/stable/c/5b4826657d36c218e9f08e8d3223b0edce3de88f", "name": "https://git.kernel.org/stable/c/5b4826657d36c218e9f08e8d3223b0edce3de88f", "tags": ["Patch"], "refsource": ""}, {"url": "https://git.kernel.org/stable/c/616f76498d5ddf26b997caf64a95cda3c8a55533", "name": "https://git.kernel.org/stable/c/616f76498d5ddf26b997caf64a95cda3c8a55533", "tags": ["Patch"], "refsource": ""}, {"url": "https://git.kernel.org/stable/c/61fb38cfbb1d54d3dafd0c25752f684b3cd00b32", "name": "https://git.kernel.org/stable/c/61fb38cfbb1d54d3dafd0c25752f684b3cd00b32", "tags": ["Patch"], "refsource": ""}, {"url": "https://git.kernel.org/stable/c/88e22159750b0d55793302eeed8ee603f5c1a95c", "name": "https://git.kernel.org/stable/c/88e22159750b0d55793302eeed8ee603f5c1a95c", "tags": ["Patch"], "refsource": ""}, {"url": "https://git.kernel.org/stable/c/91b34bf0409f43bb60453bab23c5beadd726d022", "name": "https://git.kernel.org/stable/c/91b34bf0409f43bb60453bab23c5beadd726d022", "tags": ["Patch"], "refsource": ""}, {"url": "https://git.kernel.org/stable/c/b3a9b227d5e7467b8518160ff034ea22bb9de573", "name": "https://git.kernel.org/stable/c/b3a9b227d5e7467b8518160ff034ea22bb9de573", "tags": ["Patch"], "refsource": ""}, {"url": "https://git.kernel.org/stable/c/e198f1930050e3115c80b67d9249f80f98a27c67", "name": "https://git.kernel.org/stable/c/e198f1930050e3115c80b67d9249f80f98a27c67", "tags": ["Patch"], "refsource": ""}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: Fix listen() setting the bar too high for the prealloc rings\n\nAF_RXRPC's listen() handler lets you set the backlog up to 32 (if you bump\nup the sysctl), but whilst the preallocation circular buffers have 32 slots\nin them, one of them has to be a dead slot because we're using CIRC_CNT().\n\nThis means that listen(rxrpc_sock, 32) will cause an oops when the socket\nis closed because rxrpc_service_prealloc_one() allocated one too many calls\nand rxrpc_discard_prealloc() won't then be able to get rid of them because\nit'll think the ring is empty. rxrpc_release_calls_on_socket() then tries\nto abort them, but oopses because call->peer isn't yet set.\n\nFix this by setting the maximum backlog to RXRPC_BACKLOG_MAX - 1 to match\nthe ring capacity.\n\n BUG: kernel NULL pointer dereference, address: 0000000000000086\n ...\n RIP: 0010:rxrpc_send_abort_packet+0x73/0x240 [rxrpc]\n Call Trace:\n <TASK>\n ? __wake_up_common_lock+0x7a/0x90\n ? rxrpc_notify_socket+0x8e/0x140 [rxrpc]\n ? rxrpc_abort_call+0x4c/0x60 [rxrpc]\n rxrpc_release_calls_on_socket+0x107/0x1a0 [rxrpc]\n rxrpc_release+0xc9/0x1c0 [rxrpc]\n __sock_release+0x37/0xa0\n sock_close+0x11/0x20\n __fput+0x89/0x240\n task_work_run+0x59/0x90\n do_exit+0x319/0xaa0"}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-476"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2022-49450", "ASSIGNER": "cve@kernel.org"}}, "impact": {"baseMetricV3": {"cvssV3": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}}, "publishedDate": "2025-02-26T07:01Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "5.4.198", "versionStartIncluding": "4.20"}, {"cpe23Uri": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "5.10.121", "versionStartIncluding": "5.5"}, {"cpe23Uri": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "5.15.46", "versionStartIncluding": "5.11"}, {"cpe23Uri": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "5.17.14", "versionStartIncluding": "5.16"}, {"cpe23Uri": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "5.18.3", "versionStartIncluding": "5.18"}, {"cpe23Uri": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "4.14.283", "versionStartIncluding": "4.10"}, {"cpe23Uri": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "4.9.318", "versionStartIncluding": "4.9"}, {"cpe23Uri": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "4.19.247", "versionStartIncluding": "4.15"}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2025-03-17T16:12Z"}