CVE-2026-74386

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74386", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.890Z", "datePublished": "2026-08-15T05:59:01.786Z", "dateUpdated": "2026-10-30T12:29:52.129Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:29:52.129Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet-tcp: fix page fragment cache leak in error path\n\nIn nvmet_tcp_alloc_queue(), when a connection is closed during the\nallocation process (e.g., nvmet_tcp_set_queue_sock() returns -ENOTCONN),\nthe error handling jumps to out_destroy_sq and then to out_ida_remove\nwithout draining the page fragment cache.\n\nAlthough nvmet_tcp_free_cmd() is called in some error paths to release\nindividual page fragments, the underlying page cache reference held by\nqueue->pf_cache is never released. The first allocation using pf_cache\nis the call to nvmet_tcp_alloc_cmd() for queue->connect, which happens\nafter ida_alloc() returns successfully. This results in a page leak each\ntime a connection fails during allocation, which could lead to memory\nexhaustion over time if connections are repeatedly opened and closed.\n\nFix this by calling page_frag_cache_drain() before freeing the queue\nstructure in the out_ida_remove label."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/nvme/target/tcp.c"], "versions": [{"version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30", "lessThan": "aadb8eb9006e192c51b499860f40765de7d55680", "status": "affected", "versionType": "git"}, {"version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30", "lessThan": "fc11e3f0daaadb6e600a86e54b089d4662d0a464", "status": "affected", "versionType": "git"}, {"version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30", "lessThan": "a43a9abc1ebf663f0aa56a729106f68dd9c77da6", "status": "affected", "versionType": "git"}, {"version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30", "lessThan": "ba3209704b3cd46961e4e081af5c52a780785648", "status": "affected", "versionType": "git"}, {"version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30", "lessThan": "5fbe83a374f09561a0f0c1f4aa021501ffd681eb", "status": "affected", "versionType": "git"}, {"version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30", "lessThan": "4dae393956093c807212918fd91a8fc70df15338", "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/nvme/target/tcp.c"], "versions": [{"version": "5.0", "status": "affected"}, {"version": "0", "lessThan": "5.0", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "5.0", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.12.97"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/aadb8eb9006e192c51b499860f40765de7d55680"}, {"url": "https://git.kernel.org/stable/c/fc11e3f0daaadb6e600a86e54b089d4662d0a464"}, {"url": "https://git.kernel.org/stable/c/a43a9abc1ebf663f0aa56a729106f68dd9c77da6"}, {"url": "https://git.kernel.org/stable/c/ba3209704b3cd46961e4e081af5c52a780785648"}, {"url": "https://git.kernel.org/stable/c/5fbe83a374f09561a0f0c1f4aa021501ffd681eb"}, {"url": "https://git.kernel.org/stable/c/4dae393956093c807212918fd91a8fc70df15338"}], "title": "nvmet-tcp: fix page fragment cache leak in error path", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/nvme/target/tcp.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "aadb8eb9006e192c51b499860f40765de7d55680", "status": "affected", "version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30", "versionType": "git"}, {"lessThan": "fc11e3f0daaadb6e600a86e54b089d4662d0a464", "status": "affected", "version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30", "versionType": "git"}, {"lessThan": "a43a9abc1ebf663f0aa56a729106f68dd9c77da6", "status": "affected", "version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30", "versionType": "git"}, {"lessThan": "ba3209704b3cd46961e4e081af5c52a780785648", "status": "affected", "version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30", "versionType": "git"}, {"lessThan": "5fbe83a374f09561a0f0c1f4aa021501ffd681eb", "status": "affected", "version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30", "versionType": "git"}, {"lessThan": "4dae393956093c807212918fd91a8fc70df15338", "status": "affected", "version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/nvme/target/tcp.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.0"}, {"lessThan": "5.0", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.97", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.40", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet-tcp: fix page fragment cache leak in error path\n\nIn nvmet_tcp_alloc_queue(), when a connection is closed during the\nallocation process (e.g., nvmet_tcp_set_queue_sock() returns -ENOTCONN),\nthe error handling jumps to out_destroy_sq and then to out_ida_remove\nwithout draining the page fragment cache.\n\nAlthough nvmet_tcp_free_cmd() is called in some error paths to release\nindividual page fragments, the underlying page cache reference held by\nqueue->pf_cache is never released. The first allocation using pf_cache\nis the call to nvmet_tcp_alloc_cmd() for queue->connect, which happens\nafter ida_alloc() returns successfully. This results in a page leak each\ntime a connection fails during allocation, which could lead to memory\nexhaustion over time if connections are repeatedly opened and closed.\n\nFix this by calling page_frag_cache_drain() before freeing the queue\nstructure in the out_ida_remove label."}], "id": "CVE-2026-74386", "lastModified": "2026-10-30T13:19:56.223", "metrics": {}, "published": "2026-08-15T06:22:40.513", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4dae393956093c807212918fd91a8fc70df15338"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5fbe83a374f09561a0f0c1f4aa021501ffd681eb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a43a9abc1ebf663f0aa56a729106f68dd9c77da6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/aadb8eb9006e192c51b499860f40765de7d55680"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ba3209704b3cd46961e4e081af5c52a780785648"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fc11e3f0daaadb6e600a86e54b089d4662d0a464"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: nvmet-tcp: fix page fragment cache leak in error path", "id": "2516750", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516750"}, "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"}, "cwe": "CWE-911", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnvmet-tcp: fix page fragment cache leak in error path\nIn nvmet_tcp_alloc_queue(), when a connection is closed during the\nallocation process (e.g., nvmet_tcp_set_queue_sock() returns -ENOTCONN),\nthe error handling jumps to out_destroy_sq and then to out_ida_remove\nwithout draining the page fragment cache.\nAlthough nvmet_tcp_free_cmd() is called in some error paths to release\nindividual page fragments, the underlying page cache reference held by\nqueue->pf_cache is never released. The first allocation using pf_cache\nis the call to nvmet_tcp_alloc_cmd() for queue->connect, which happens\nafter ida_alloc() returns successfully. This results in a page leak each\ntime a connection fails during allocation, which could lead to memory\nexhaustion over time if connections are repeatedly opened and closed.\nFix this by calling page_frag_cache_drain() before freeing the queue\nstructure in the out_ida_remove label.", "A flaw was found in the nvmet-tcp component of the Linux kernel. A remote attacker could repeatedly open and close connections, causing a page fragment cache leak. This vulnerability occurs when a connection is closed during the allocation process, leading to memory not being properly released. Over time, this repeated memory leak could lead to memory exhaustion, resulting in a Denial of Service (DoS) for the affected system."], "name": "CVE-2026-74386", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-74386\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-74386\nhttps://lore.kernel.org/linux-cve-announce/2026081506-CVE-2026-74386-9fc4@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[872d26a391da92ed8f0c0f5cb5fef428067b7f30,a43a9abc1ebf663f0aa56a729106f68dd9c77da6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[872d26a391da92ed8f0c0f5cb5fef428067b7f30,ba3209704b3cd46961e4e081af5c52a780785648)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[872d26a391da92ed8f0c0f5cb5fef428067b7f30,5fbe83a374f09561a0f0c1f4aa021501ffd681eb)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[872d26a391da92ed8f0c0f5cb5fef428067b7f30,4dae393956093c807212918fd91a8fc70df15338)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "5.0"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.97,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.40,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-15T16:30:03.971994+00:00", "updated": "2026-08-22T01:30:17.265505+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}