{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-50355", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-09-17T14:53:06.993Z", "datePublished": "2025-09-17T14:56:08.356Z", "dateUpdated": "2026-08-05T08:58:21.802Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:58:21.802Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: vt6655: fix some erroneous memory clean-up loops\n\nIn some initialization functions of this driver, memory is allocated with\n'i' acting as an index variable and increasing from 0. The commit in\n\"Fixes\" introduces some clean-up codes in case of allocation failure,\nwhich free memory in reverse order with 'i' decreasing to 0. However,\nthere are some problems:\n - The case i=0 is left out. Thus memory is leaked.\n - In case memory allocation fails right from the start, the memory\n freeing loops will start with i=-1 and invalid memory locations will\n be accessed.\n\nOne of these loops has been fixed in commit c8ff91535880 (\"staging:\nvt6655: fix potential memory leak\"). Fix the remaining erroneous loops." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The flaw is reached only when bringing up the vt6655 mac80211 interface (SIOCSIFFLAGS/ip link set up → ieee80211_open → drv_start → vnt_start → device_init_rd0/rd1/td1_ring), which is local driver initialization—not packet parsing or adjacent-link frame injection.\nAC:L - A local attacker can induce memory pressure (memcg/mmap) so the first kzalloc or device_alloc_rx_buf in ring init fails after device_init_rings succeeds, then deterministically hit the broken while (--i) path; no race or attacker-uncontrollable layout is required.\nPR:L - Triggering vnt_start requires CAP_NET_ADMIN to set IFF_UP, but in realistic deployments (NetworkManager/polkit seat policies, delegated net admin) an unprivileged local user can enable the wireless interface; per guidance when uncertain this is scored Low rather than High.\nUI:N - The attacker brings the interface up and forces the allocation-failure cleanup themselves; no separate victim mount, click, or other interactive action is required.\nS:U - Impact is host-kernel heap corruption inside the staging PCI WiFi driver under the same OS authority, with no VM escape, IOMMU bypass, or other security-boundary crossing.\nC:H - On i==0 failure, while (--i) indexes aRD1Ring[-1]/apTD1Rings[-1] into the previously initialized adjacent DMA ring and frees live rd_info/td_info (double-free), and continues further OOB—classic heap corruption enabling arbitrary kernel read primitives.\nI:H - The same OOB/double-free of descriptor side objects (kfree, dma_unmap, kfree_skb on adjacent or garbage pointers) is exploitable for heap corruption and control-flow hijacking beyond a pure crash.\nA:H - The buggy loop from i==0 decrements indefinitely through invalid indices and frees garbage/adjacent objects, causing kernel oops/panic even without full exploitation; any such crash is Availability High." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/staging/vt6655/device_main.c" ], "versions": [ { "version": "5341ee0adb17d12a96dc5344e0d267cd12b52135", "lessThan": "637672a71f5016a40b0a6c0f3c8ad25eacedc8c3", "status": "affected", "versionType": "git" }, { "version": "5341ee0adb17d12a96dc5344e0d267cd12b52135", "lessThan": "88b9cc60f26e8a05d1ddbddf91b09ca2915f20e0", "status": "affected", "versionType": "git" }, { "version": "5341ee0adb17d12a96dc5344e0d267cd12b52135", "lessThan": "95ac62e8545be2b0a8cae0beef7c682e2e470e48", "status": "affected", "versionType": "git" }, { "version": "5341ee0adb17d12a96dc5344e0d267cd12b52135", "lessThan": "f19e5b7df54590c831f350381963f25585c8f7d5", "status": "affected", "versionType": "git" }, { "version": "5341ee0adb17d12a96dc5344e0d267cd12b52135", "lessThan": "a9e9806d1c315bc50dce05479a079b9a104474b8", "status": "affected", "versionType": "git" }, { "version": "5341ee0adb17d12a96dc5344e0d267cd12b52135", "lessThan": "ed11b73c963292e7b49c0f37025c58ed3b7921d6", "status": "affected", "versionType": "git" }, { "version": "5341ee0adb17d12a96dc5344e0d267cd12b52135", "lessThan": "2a2db520e3ca5aafba7c211abfd397666c9b5f9d", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/staging/vt6655/device_main.c" ], "versions": [ { "version": "4.18", "status": "affected" }, { "version": "0", "lessThan": "4.18", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.262", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.220", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.150", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.75", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.19.17", "lessThanOrEqual": "5.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.0.3", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "4.19.262" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "5.4.220" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "5.10.150" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "5.15.75" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "5.19.17" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "6.0.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "6.1" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/637672a71f5016a40b0a6c0f3c8ad25eacedc8c3" }, { "url": "https://git.kernel.org/stable/c/88b9cc60f26e8a05d1ddbddf91b09ca2915f20e0" }, { "url": "https://git.kernel.org/stable/c/95ac62e8545be2b0a8cae0beef7c682e2e470e48" }, { "url": "https://git.kernel.org/stable/c/f19e5b7df54590c831f350381963f25585c8f7d5" }, { "url": "https://git.kernel.org/stable/c/a9e9806d1c315bc50dce05479a079b9a104474b8" }, { "url": "https://git.kernel.org/stable/c/ed11b73c963292e7b49c0f37025c58ed3b7921d6" }, { "url": "https://git.kernel.org/stable/c/2a2db520e3ca5aafba7c211abfd397666c9b5f9d" } ], "title": "staging: vt6655: fix some erroneous memory clean-up loops", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "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" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2022-50355", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2026-01-14T18:31:51.758929Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-401", "description": "CWE-401 Missing Release of Memory after Effective Lifetime" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-14T18:33:00.943Z" } } ] } }