{"id":"CVE-2026-31467","summary":"erofs: add GFP_NOIO in the bio completion if needed","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: add GFP_NOIO in the bio completion if needed\n\nThe bio completion path in the process context (e.g. dm-verity)\nwill directly call into decompression rather than trigger another\nworkqueue context for minimal scheduling latencies, which can\nthen call vm_map_ram() with GFP_KERNEL.\n\nDue to insufficient memory, vm_map_ram() may generate memory\nswapping I/O, which can cause submit_bio_wait to deadlock\nin some scenarios.\n\nTrimmed down the call stack, as follows:\n\nf2fs_submit_read_io\n  submit_bio                      //bio_list is initialized.\n    mmc_blk_mq_recovery\n      z_erofs_endio\n        vm_map_ram\n          __pte_alloc_kernel\n            __alloc_pages_direct_reclaim\n              shrink_folio_list\n                __swap_writepage\n                  submit_bio_wait  //bio_list is non-NULL, hang!!!\n\nUse memalloc_noio_{save,restore}() to wrap up this path.","modified":"2026-06-18T03:55:56.938532530Z","published":"2026-04-22T13:53:56.910Z","related":["ALSA-2026:25191"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31467.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/378949f46e897204384f3f5f91e42e93e3f87568"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5c8ecdcfbfb0b0c6a82a4ebadc1ddea61609b902"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c23df30915f83e7257c8625b690a1cece94142a0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d6565ea662e17d45a577184b0011bd69de22dc2b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d9d8360cb66e3b599d89d2526e7da8b530ebf2ff"},{"type":"WEB","url":"https://git.kernel.org/stable/c/da40464064599eefe78749f75cd2bba371044c04"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e83e20b82859f0588e9a52a6fa9fea704a2061cf"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31467.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31467"},{"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":"648f2de053a882c87c05f0060f47d3b11841fdbe"},{"fixed":"d6565ea662e17d45a577184b0011bd69de22dc2b"},{"fixed":"d9d8360cb66e3b599d89d2526e7da8b530ebf2ff"},{"fixed":"5c8ecdcfbfb0b0c6a82a4ebadc1ddea61609b902"},{"fixed":"378949f46e897204384f3f5f91e42e93e3f87568"},{"fixed":"da40464064599eefe78749f75cd2bba371044c04"},{"fixed":"e83e20b82859f0588e9a52a6fa9fea704a2061cf"},{"fixed":"c23df30915f83e7257c8625b690a1cece94142a0"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-31467.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.13.0"},{"fixed":"5.15.203"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.168"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.131"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.80"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.21"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.11"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-31467.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}