High 7.5Published Apr 22, 2026

CVE-2026-31467erofs: add GFP_NOIO in the bio completion if needed

Updated under an hour ago (Oct 26, 2026, 9:50 PM ET)

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Exploited in the last 30 days

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.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: Aug 5, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 648f2de053a882c87c05f0060f47d3b11841fdbe before d6565ea662e17d45a577184b0011bd69de22dc2b; from 648f2de053a882c87c05f0060f47d3b11841fdbe before d9d8360cb66e3b599d89d2526e7da8b530ebf2ff; 648f2de053a882c87c05f0060f47d3b11841fdbe builds before 5c8ecdcfbfb0b0c6a82a4ebadc1ddea61609b902; from 648f2de053a882c87c05f0060f47d3b11841fdbe before 378949f46e897204384f3f5f91e42e93e3f87568; from 648f2de053a882c87c05f0060f47d3b11841fdbe before da40464064599eefe78749f75cd2bba371044c04; from 648f2de053a882c87c05f0060f47d3b11841fdbe before e83e20b82859f0588e9a52a6fa9fea704a2061cf; from 648f2de053a882c87c05f0060f47d3b11841fdbe before c23df30915f83e7257c8625b690a1cece94142a0	CNA record
linux linux_kernel linux:linux_kernel	from 5.13 before 5.15.203; from 5.16 before 6.1.168; from 6.2 before 6.6.131; from 6.7 before 6.12.80; from 6.13 before 6.18.21; from 6.19 before 6.19.11; 7.0; 7.0; and 3 more ranges	NVD

References

References

https://git.kernel.org/stable/c/d6565ea662e17d45a577184b0011bd69de22dc2b	patch
https://git.kernel.org/stable/c/d9d8360cb66e3b599d89d2526e7da8b530ebf2ff	patch
https://git.kernel.org/stable/c/5c8ecdcfbfb0b0c6a82a4ebadc1ddea61609b902	patch
https://git.kernel.org/stable/c/378949f46e897204384f3f5f91e42e93e3f87568	patch
https://git.kernel.org/stable/c/da40464064599eefe78749f75cd2bba371044c04	patch
https://git.kernel.org/stable/c/e83e20b82859f0588e9a52a6fa9fea704a2061cf	patch
https://git.kernel.org/stable/c/c23df30915f83e7257c8625b690a1cece94142a0	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.