CVE-2026-74542

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74542", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.914Z", "datePublished": "2026-08-15T12:27:52.741Z", "dateUpdated": "2026-10-21T12:45:52.776Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-21T12:45:52.776Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs: Fix folio_queue ENOMEM in writeback by adding a mempool\n\nFix the handling of folio_queue allocation failure in writeback by adding a\nmempool and passing in gfp_t flags to the rolling buffer functions that\nallocate memory, using the mempool if gfp != GFP_KERNEL.\n\nThis is then extended upwards and the gfp to be used for a request is stored\nin the netfs_io_request struct and is then used for both requests and\nsubrequests, eliminating the sleeping loops there.\n\nThe failure caused:\n\n folio != NULL\n WARNING: fs/netfs/write_issue.c:603 at netfs_writepages+0x883/0xa10 fs/netfs/write_issue.c:603, CPU#3: syz.0.17/5919"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/netfs/buffered_read.c", "fs/netfs/internal.h", "fs/netfs/main.c", "fs/netfs/objects.c", "fs/netfs/read_pgpriv2.c", "fs/netfs/rolling_buffer.c", "fs/netfs/write_issue.c", "include/linux/netfs.h", "include/linux/rolling_buffer.h"], "versions": [{"version": "cd0277ed0c188dd40e7744e89299af7b78831ca4", "lessThan": "b343252d6f536203dd0660f676190dcbf6d2ecdc", "status": "affected", "versionType": "git"}, {"version": "cd0277ed0c188dd40e7744e89299af7b78831ca4", "lessThan": "15ed8a9b7c63e9171f5139a6aaa1ffb61809861f", "status": "affected", "versionType": "git"}, {"version": "cd0277ed0c188dd40e7744e89299af7b78831ca4", "lessThan": "3f6d7f8a5416d852648d15a05e895f1195ee8a85", "status": "affected", "versionType": "git"}, {"version": "cd0277ed0c188dd40e7744e89299af7b78831ca4", "lessThan": "1d78d56c43ef3768183e8370e7367b162700e049", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/netfs/buffered_read.c", "fs/netfs/internal.h", "fs/netfs/main.c", "fs/netfs/objects.c", "fs/netfs/read_pgpriv2.c", "fs/netfs/rolling_buffer.c", "fs/netfs/write_issue.c", "include/linux/netfs.h", "include/linux/rolling_buffer.h"], "versions": [{"version": "6.12", "status": "affected"}, {"version": "0", "lessThan": "6.12", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.114", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.57", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.8", "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": "6.12", "versionEndExcluding": "6.12.114"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.18.57"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "7.1.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/b343252d6f536203dd0660f676190dcbf6d2ecdc"}, {"url": "https://git.kernel.org/stable/c/15ed8a9b7c63e9171f5139a6aaa1ffb61809861f"}, {"url": "https://git.kernel.org/stable/c/3f6d7f8a5416d852648d15a05e895f1195ee8a85"}, {"url": "https://git.kernel.org/stable/c/1d78d56c43ef3768183e8370e7367b162700e049"}], "title": "netfs: Fix folio_queue ENOMEM in writeback by adding a mempool", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/netfs/buffered_read.c", "fs/netfs/internal.h", "fs/netfs/main.c", "fs/netfs/objects.c", "fs/netfs/read_pgpriv2.c", "fs/netfs/rolling_buffer.c", "fs/netfs/write_issue.c", "include/linux/netfs.h", "include/linux/rolling_buffer.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "b343252d6f536203dd0660f676190dcbf6d2ecdc", "status": "affected", "version": "cd0277ed0c188dd40e7744e89299af7b78831ca4", "versionType": "git"}, {"lessThan": "15ed8a9b7c63e9171f5139a6aaa1ffb61809861f", "status": "affected", "version": "cd0277ed0c188dd40e7744e89299af7b78831ca4", "versionType": "git"}, {"lessThan": "3f6d7f8a5416d852648d15a05e895f1195ee8a85", "status": "affected", "version": "cd0277ed0c188dd40e7744e89299af7b78831ca4", "versionType": "git"}, {"lessThan": "1d78d56c43ef3768183e8370e7367b162700e049", "status": "affected", "version": "cd0277ed0c188dd40e7744e89299af7b78831ca4", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/netfs/buffered_read.c", "fs/netfs/internal.h", "fs/netfs/main.c", "fs/netfs/objects.c", "fs/netfs/read_pgpriv2.c", "fs/netfs/rolling_buffer.c", "fs/netfs/write_issue.c", "include/linux/netfs.h", "include/linux/rolling_buffer.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.12"}, {"lessThan": "6.12", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.114", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.57", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.8", "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\nnetfs: Fix folio_queue ENOMEM in writeback by adding a mempool\n\nFix the handling of folio_queue allocation failure in writeback by adding a\nmempool and passing in gfp_t flags to the rolling buffer functions that\nallocate memory, using the mempool if gfp != GFP_KERNEL.\n\nThis is then extended upwards and the gfp to be used for a request is stored\nin the netfs_io_request struct and is then used for both requests and\nsubrequests, eliminating the sleeping loops there.\n\nThe failure caused:\n\n folio != NULL\n WARNING: fs/netfs/write_issue.c:603 at netfs_writepages+0x883/0xa10 fs/netfs/write_issue.c:603, CPU#3: syz.0.17/5919"}], "id": "CVE-2026-74542", "lastModified": "2026-10-21T13:19:46.490", "metrics": {}, "published": "2026-08-15T13:17:59.543", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/15ed8a9b7c63e9171f5139a6aaa1ffb61809861f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1d78d56c43ef3768183e8370e7367b162700e049"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3f6d7f8a5416d852648d15a05e895f1195ee8a85"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b343252d6f536203dd0660f676190dcbf6d2ecdc"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: netfs: Fix folio_queue ENOMEM in writeback by adding a mempool", "id": "2517042", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2517042"}, "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-770", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnetfs: Fix folio_queue ENOMEM in writeback by adding a mempool\nFix the handling of folio_queue allocation failure in writeback by adding a\nmempool and passing in gfp_t flags to the rolling buffer functions that\nallocate memory, using the mempool if gfp != GFP_KERNEL.\nThis is then extended upwards and the gfp to be used for a request is stored\nin the netfs_io_request struct and is then used for both requests and\nsubrequests, eliminating the sleeping loops there.\nThe failure caused:\nfolio != NULL\nWARNING: fs/netfs/write_issue.c:603 at netfs_writepages+0x883/0xa10 fs/netfs/write_issue.c:603, CPU#3: syz.0.17/5919", "A flaw was found in the `netfs` component of the Linux kernel. A memory allocation failure (ENOMEM) can occur during writeback operations when the system attempts to allocate `folio_queue` resources. This issue can lead to a kernel warning and potential system instability, which a local attacker could leverage to cause a Denial of Service (DoS)."], "name": "CVE-2026-74542", "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-74542\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-74542\nhttps://lore.kernel.org/linux-cve-announce/2026081548-CVE-2026-74542-883e@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[cd0277ed0c188dd40e7744e89299af7b78831ca4,3f6d7f8a5416d852648d15a05e895f1195ee8a85)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[cd0277ed0c188dd40e7744e89299af7b78831ca4,1d78d56c43ef3768183e8370e7367b162700e049)"}}], "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": "semver", "value": "6.12"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.12)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.8,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2-rc6,*]"}}], "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": "2026-08-15T15:15:03.212611+00:00", "updated": "2026-08-21T22:00:14.997796+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}