CVE-2022-50459

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Originally, we just held the frwd_lock the entire time but in\ncommit bcf3a2953d36 (\"scsi: iscsi: iscsi_tcp: Avoid holding spinlock while\ncalling getpeername()\") we switched to refcount based because the network\nlayer changed and started taking a mutex in that path, so we could no\nlonger hold the frwd_lock.\n\nInstead of trying to maintain multiple refcounts, this just has us use a\nmutex for accessing the socket in the interface code paths."}], "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 vulnerable path is reached by reading world-readable iscsi_connection/iscsi_host sysfs attributes (address/port/local_port/ipaddress) that call iscsi_sw_tcp_conn_get_param()/iscsi_sw_tcp_host_get_param(), a local sysfs/syscall path rather than remote packet processing.\nAC:L - An attacker who can spam the sysfs reads controls one side of the race and can align it with connection stop/logout/cleanup_work teardown; when the attacker also manages the session they control both sides, so success does not depend on attacker-uncontrollable memory layout.\nPR:L - The crashing/UAF read path uses S_IRUGO sysfs attributes with no capable() check, so on hosts that already have iscsi_tcp sessions an unprivileged local user (e.g. cat of the attr) can trigger the bug without CAP_SYS_ADMIN.\nUI:N - Exploitation requires only the attacker\u2019s own sysfs reads raced with connection teardown; no separate victim action such as mounting a filesystem is required.\nS:U - Impact remains within the host kernel\u2019s iSCSI/socket authority and does not cross a VM, IOMMU, or other security boundary.\nC:H - The bug holds only a struct sock ref while sockfd_put may free the struct socket, yielding a UAF of the socket object whose reused contents can be sprayed to obtain an arbitrary kernel read primitive.\nI:H - Use-after-free of struct socket allows a sprayed sock->ops function-pointer table, so kernel_getpeername()/getsockname() can be turned into control-flow hijacking / arbitrary write rather than only a crash.\nA:H - The documented concurrent free versus getpeername path NULL-dereferences sock->ops (and UAF crashes under KASAN), causing a kernel oops/panic and full availability loss."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/scsi/iscsi_tcp.c", "drivers/scsi/iscsi_tcp.h"], "versions": [{"version": "bcf3a2953d36bbfb9bd44ccb3db0897d935cc485", "lessThan": "884a788f065578bb640382279a83d1df433b13e6", "status": "affected", "versionType": "git"}, {"version": "bcf3a2953d36bbfb9bd44ccb3db0897d935cc485", "lessThan": "a26b0658751bb0a3b28386fca715333b104d32a2", "status": "affected", "versionType": "git"}, {"version": "bcf3a2953d36bbfb9bd44ccb3db0897d935cc485", "lessThan": "897dbbc57d71e8a34ec1af8e573a142de457da38", "status": "affected", "versionType": "git"}, {"version": "bcf3a2953d36bbfb9bd44ccb3db0897d935cc485", "lessThan": "0a0b861fce2657ba08ec356a74346b37ca4b2008", "status": "affected", "versionType": "git"}, {"version": "bcf3a2953d36bbfb9bd44ccb3db0897d935cc485", "lessThan": "57569c37f0add1b6489e1a1563c71519daf732cf", "status": "affected", "versionType": "git"}, {"version": "7d29e950766327f658cb92722b9445ac3b3ae023", "status": "affected", "versionType": "git"}, {"version": "5.8.14", "lessThan": "5.9", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/scsi/iscsi_tcp.c", "drivers/scsi/iscsi_tcp.h"], "versions": [{"version": "5.9", "status": "affected"}, {"version": "0", "lessThan": "5.9", "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": "5.9", "versionEndExcluding": "5.10.150"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "5.15.75"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "5.19.17"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.0.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.1"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8.14"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/884a788f065578bb640382279a83d1df433b13e6"}, {"url": "https://git.kernel.org/stable/c/a26b0658751bb0a3b28386fca715333b104d32a2"}, {"url": "https://git.kernel.org/stable/c/897dbbc57d71e8a34ec1af8e573a142de457da38"}, {"url": "https://git.kernel.org/stable/c/0a0b861fce2657ba08ec356a74346b37ca4b2008"}, {"url": "https://git.kernel.org/stable/c/57569c37f0add1b6489e1a1563c71519daf732cf"}], "title": "scsi: iscsi: iscsi_tcp: Fix null-ptr-deref while calling getpeername()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

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Originally, we just held the frwd_lock the entire time but in\ncommit bcf3a2953d36 (\"scsi: iscsi: iscsi_tcp: Avoid holding spinlock while\ncalling getpeername()\") we switched to refcount based because the network\nlayer changed and started taking a mutex in that path, so we could no\nlonger hold the frwd_lock.\n\nInstead of trying to maintain multiple refcounts, this just has us use a\nmutex for accessing the socket in the interface code paths."}], "id": "CVE-2022-50459", "lastModified": "2026-08-04T10:18:17.363", "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"}]}, "published": "2025-10-01T12:15:39.283", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0a0b861fce2657ba08ec356a74346b37ca4b2008"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/57569c37f0add1b6489e1a1563c71519daf732cf"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/884a788f065578bb640382279a83d1df433b13e6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/897dbbc57d71e8a34ec1af8e573a142de457da38"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a26b0658751bb0a3b28386fca715333b104d32a2"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: scsi: iscsi: iscsi_tcp: Fix null-ptr-deref while calling getpeername()", "id": "2400713", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2400713"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2022-50459", "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": "Out of support scope", "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:rhivos:1", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat In-Vehicle Operating System 1"}], "public_date": "2025-10-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-50459\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-50459\nhttps://lore.kernel.org/linux-cve-announce/2025100119-CVE-2022-50459-2340@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-10-02T08:38:26.883706+00:00", "updated": "2025-10-02T08:38:26.883758+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}