Vulnerability Description
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 Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.13, < 5.15.203 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/378949f46e897204384f3f5f91e42e93e3f87568Patch
- https://git.kernel.org/stable/c/5c8ecdcfbfb0b0c6a82a4ebadc1ddea61609b902Patch
- https://git.kernel.org/stable/c/c23df30915f83e7257c8625b690a1cece94142a0Patch
- https://git.kernel.org/stable/c/d6565ea662e17d45a577184b0011bd69de22dc2bPatch
- https://git.kernel.org/stable/c/d9d8360cb66e3b599d89d2526e7da8b530ebf2ffPatch
- https://git.kernel.org/stable/c/da40464064599eefe78749f75cd2bba371044c04Patch
- https://git.kernel.org/stable/c/e83e20b82859f0588e9a52a6fa9fea704a2061cfPatch
FAQ
What is CVE-2026-31467?
CVE-2026-31467 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 ...
How severe is CVE-2026-31467?
CVE-2026-31467 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-31467?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.