{"id":"CVE-2026-74542","summary":"netfs: Fix folio_queue ENOMEM in writeback by adding a mempool","details":"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","modified":"2026-10-28T02:30:51.100489122Z","published":"2026-08-15T12:27:52.741Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74542.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/15ed8a9b7c63e9171f5139a6aaa1ffb61809861f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1d78d56c43ef3768183e8370e7367b162700e049"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3f6d7f8a5416d852648d15a05e895f1195ee8a85"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b343252d6f536203dd0660f676190dcbf6d2ecdc"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74542.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74542"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"cd0277ed0c188dd40e7744e89299af7b78831ca4"},{"fixed":"b343252d6f536203dd0660f676190dcbf6d2ecdc"},{"fixed":"15ed8a9b7c63e9171f5139a6aaa1ffb61809861f"},{"fixed":"3f6d7f8a5416d852648d15a05e895f1195ee8a85"},{"fixed":"1d78d56c43ef3768183e8370e7367b162700e049"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74542.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.12.0"},{"fixed":"6.12.114"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.57"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.8"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74542.json"}}],"schema_version":"1.9.2"}