CVE-2022-50355

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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 \u2192 ieee80211_open \u2192 drv_start \u2192 vnt_start \u2192 device_init_rd0/rd1/td1_ring), which is local driver initialization\u2014not 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\u2014classic 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": 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"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:*:*:*:*:*:*:*:*", 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"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 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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\u2014classic 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": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5341ee0adb17d12a96dc5344e0d267cd12b52135", "lessThan": "637672a71f5016a40b0a6c0f3c8ad25eacedc8c3", "versionType": "git"}, {"status": "affected", "version": "5341ee0adb17d12a96dc5344e0d267cd12b52135", "lessThan": "88b9cc60f26e8a05d1ddbddf91b09ca2915f20e0", "versionType": "git"}, {"status": "affected", "version": "5341ee0adb17d12a96dc5344e0d267cd12b52135", "lessThan": "95ac62e8545be2b0a8cae0beef7c682e2e470e48", "versionType": "git"}, {"status": "affected", "version": "5341ee0adb17d12a96dc5344e0d267cd12b52135", "lessThan": "f19e5b7df54590c831f350381963f25585c8f7d5", "versionType": "git"}, {"status": "affected", "version": "5341ee0adb17d12a96dc5344e0d267cd12b52135", "lessThan": "a9e9806d1c315bc50dce05479a079b9a104474b8", "versionType": "git"}, {"status": "affected", "version": "5341ee0adb17d12a96dc5344e0d267cd12b52135", "lessThan": "ed11b73c963292e7b49c0f37025c58ed3b7921d6", "versionType": "git"}, {"status": "affected", "version": "5341ee0adb17d12a96dc5344e0d267cd12b52135", "lessThan": "2a2db520e3ca5aafba7c211abfd397666c9b5f9d", "versionType": "git"}], "programFiles": ["drivers/staging/vt6655/device_main.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4.18"}, {"status": "unaffected", "version": "0", "lessThan": "4.18", "versionType": "semver"}, {"status": "unaffected", "version": "4.19.262", "versionType": "semver", "lessThanOrEqual": "4.19.*"}, {"status": "unaffected", "version": "5.4.220", "versionType": "semver", "lessThanOrEqual": "5.4.*"}, {"status": "unaffected", "version": "5.10.150", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.75", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "5.19.17", "versionType": "semver", "lessThanOrEqual": "5.19.*"}, {"status": "unaffected", "version": "6.0.3", "versionType": "semver", "lessThanOrEqual": "6.0.*"}, {"status": "unaffected", "version": "6.1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/staging/vt6655/device_main.c"], "defaultStatus": "affected"}], "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"}], "x_generator": {"engine": "bippy-1.2.0"}, "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."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "4.19.262", "versionStartIncluding": "4.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.4.220", "versionStartIncluding": "4.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.150", "versionStartIncluding": "4.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.75", "versionStartIncluding": "4.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.19.17", "versionStartIncluding": "4.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.0.3", "versionStartIncluding": "4.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1", "versionStartIncluding": "4.18"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:58:21.802Z"}}}, "cveMetadata": {"cveId": "CVE-2022-50355", "state": "PUBLISHED", "dateUpdated": "2026-08-05T08:58:21.802Z", "dateReserved": "2025-09-17T14:53:06.993Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2025-09-17T14:56:08.356Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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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."}], "id": "CVE-2022-50355", "lastModified": "2026-08-04T10:18:12.540", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2022-50355", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-01-14T18:31:51.758929Z", "version": "2.0.3"}}]}, "published": "2025-09-17T15:15:34.150", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2a2db520e3ca5aafba7c211abfd397666c9b5f9d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/637672a71f5016a40b0a6c0f3c8ad25eacedc8c3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/88b9cc60f26e8a05d1ddbddf91b09ca2915f20e0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/95ac62e8545be2b0a8cae0beef7c682e2e470e48"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a9e9806d1c315bc50dce05479a079b9a104474b8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ed11b73c963292e7b49c0f37025c58ed3b7921d6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f19e5b7df54590c831f350381963f25585c8f7d5"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-401"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-401"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: staging: vt6655: fix some erroneous memory clean-up loops", "id": "2396110", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2396110"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2022-50355", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-09-17T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-50355\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-50355\nhttps://lore.kernel.org/linux-cve-announce/2025091714-CVE-2022-50355-11ce@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-09-18T12:41:29.658966+00:00", "updated": "2025-09-18T12:41:29.659018+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}