# CVE-2026-31467: CVE-2026-31467 Status: published. Published: 2026-04-22. Updated: 2026-11-11. In the Linux kernel, the following vulnerability has been resolved: erofs: add GFP_NOIO in the bio completion if needed The bio completion path in the process context (e.g. dm-verity) will directly call into decompression rather than trigger another workqueue context for minimal scheduling latencies, which can then call vm_map_ram() with GFP_KERNEL. Due to insufficient memory, vm_map_ram() may generate memory swapping I/O, which can cause submit_bio_wait to deadlock in some scenarios. Trimmed down the call stack, as follows: f2fs_submit_read_io submit_bio //bio_list is initialized. mmc_blk_mq_recovery z_erofs_endio vm_map_ram __pte_alloc_kernel __alloc_pages_direct_reclaim shrink_folio_list __swap_writepage submit_bio_wait //bio_list is non-NULL, hang!!! Use memalloc_noio_{save,restore}() to wrap up this path. ## Remediation - fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67) — https://git.kernel.org/stable/c/378949f46e897204384f3f5f91e42e93e3f87568 - fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67) — https://git.kernel.org/stable/c/5c8ecdcfbfb0b0c6a82a4ebadc1ddea61609b902 - fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67) — https://git.kernel.org/stable/c/c23df30915f83e7257c8625b690a1cece94142a0 - fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67) — https://git.kernel.org/stable/c/d6565ea662e17d45a577184b0011bd69de22dc2b - fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67) — https://git.kernel.org/stable/c/d9d8360cb66e3b599d89d2526e7da8b530ebf2ff - fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67) — https://git.kernel.org/stable/c/da40464064599eefe78749f75cd2bba371044c04 - fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67) — https://git.kernel.org/stable/c/e83e20b82859f0588e9a52a6fa9fea704a2061cf ## Affected products and versions - linux / linux_kernel: ≥ 5.13; < 5.15.203 (affected, custom). Source: NVD - linux / linux_kernel: ≥ 5.16; < 6.1.168 (affected, custom). Source: NVD - linux / linux_kernel: ≥ 6.2; < 6.6.131 (affected, custom). Source: NVD - linux / linux_kernel: ≥ 6.7; < 6.12.80 (affected, custom). Source: NVD - linux / linux_kernel: ≥ 6.13; < 6.18.21 (affected, custom). Source: NVD - linux / linux_kernel: ≥ 6.19; < 6.19.11 (affected, custom). Source: NVD - linux / linux_kernel: 7.0 (affected, custom). Source: NVD ## NVD configuration conditions Affected CPE matches depend on the following AND/OR and negation conditions: ```json [ { "negate": false, "nodes": [ { "cpeMatch": [ { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.15.203", "versionStartIncluding": "5.13", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.1.168", "versionStartIncluding": "5.16", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.6.131", "versionStartIncluding": "6.2", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.12.80", "versionStartIncluding": "6.7", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.18.21", "versionStartIncluding": "6.13", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.19.11", "versionStartIncluding": "6.19", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*", "vulnerable": true } ], "negate": false, "operator": "OR" } ], "operator": "OR" } ] ``` ## Severity and prioritization - CVSS 3.1: 7.5 (high); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H; source: NVD: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - CISA KEV: No listing in collected sources - EPSS: Not available - SSVC: Not available - Weaknesses: CWE-667 ## Exploit evidence No exploit evidence in collected sources. This is not proof of no exploitation. ## References - https://git.kernel.org/stable/c/378949f46e897204384f3f5f91e42e93e3f87568 (416baaa9-dc9f-4396-8d5f-8c081fb06d67; Patch) - https://git.kernel.org/stable/c/5c8ecdcfbfb0b0c6a82a4ebadc1ddea61609b902 (416baaa9-dc9f-4396-8d5f-8c081fb06d67; Patch) - https://git.kernel.org/stable/c/c23df30915f83e7257c8625b690a1cece94142a0 (416baaa9-dc9f-4396-8d5f-8c081fb06d67; Patch) - https://git.kernel.org/stable/c/d6565ea662e17d45a577184b0011bd69de22dc2b (416baaa9-dc9f-4396-8d5f-8c081fb06d67; Patch) - https://git.kernel.org/stable/c/d9d8360cb66e3b599d89d2526e7da8b530ebf2ff (416baaa9-dc9f-4396-8d5f-8c081fb06d67; Patch) - https://git.kernel.org/stable/c/da40464064599eefe78749f75cd2bba371044c04 (416baaa9-dc9f-4396-8d5f-8c081fb06d67; Patch) - https://git.kernel.org/stable/c/e83e20b82859f0588e9a52a6fa9fea704a2061cf (416baaa9-dc9f-4396-8d5f-8c081fb06d67; Patch) ## Provenance - NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-31467; retrieved 2026-11-12; source updated 2026-11-11 Revision: b830eb83014196650f6d29144a1d9c30446a8e6501a79e8a2dc436c25be73a04 Canonical: https://y2.dev/cve/CVE-2026-31467 ## Agent and API access Public CVE pages, Markdown, and JSON are free to read without an account or API key. - Public catalog: https://y2.dev/cve/index.json. 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