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

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于vm_map_ram使用GFP_KERNEL，可能导致内存不足时触发交换I/O，造成死锁。

CVSS 7.5 · High EPSS 0.54% · P44

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux 648f2de053a882c87c05f0060f47d3b11841fdbe< d6565ea662e17d45a577184b0011bd69de22dc2b affected
648f2de053a882c87c05f0060f47d3b11841fdbe< d9d8360cb66e3b599d89d2526e7da8b530ebf2ff affected
648f2de053a882c87c05f0060f47d3b11841fdbe< 5c8ecdcfbfb0b0c6a82a4ebadc1ddea61609b902 affected
648f2de053a882c87c05f0060f47d3b11841fdbe< 378949f46e897204384f3f5f91e42e93e3f87568 affected
648f2de053a882c87c05f0060f47d3b11841fdbe< da40464064599eefe78749f75cd2bba371044c04 affected
648f2de053a882c87c05f0060f47d3b11841fdbe< e83e20b82859f0588e9a52a6fa9fea704a2061cf affected
648f2de053a882c87c05f0060f47d3b11841fdbe< c23df30915f83e7257c8625b690a1cece94142a0 affected
5.13 affected
… +8 more rows
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I. Basic Information for CVE-2026-31467

Vulnerability Information
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Vulnerability Title
erofs: add GFP_NOIO in the bio completion if needed
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于vm_map_ram使用GFP_KERNEL，可能导致内存不足时触发交换I/O，造成死锁。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 648f2de053a882c87c05f0060f47d3b11841fdbe ~ d6565ea662e17d45a577184b0011bd69de22dc2b -
Linux Linux 5.13 -

II. Public POCs for CVE-2026-31467

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III. Intelligence Information for CVE-2026-31467

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Same Patch Batch · Linux · 2026-04-22 · 100 CVEs total

CVE-2026-31501 9.8 CRITICAL net: ti: icssg-prueth: fix use-after-free of CPPI descriptor in RX path
CVE-2026-31444 9.8 CRITICAL ksmbd: fix use-after-free and NULL deref in smb_grant_oplock()
CVE-2026-31436 9.8 CRITICAL dmaengine: idxd: fix possible wrong descriptor completion in llist_abort_desc()
CVE-2026-31463 9.8 CRITICAL iomap: fix invalid folio access when i_blkbits differs from I/O granularity
CVE-2026-31478 9.8 CRITICAL ksmbd: replace hardcoded hdr2_len with offsetof() in smb2_calc_max_out_buf_len()
CVE-2026-31448 9.4 CRITICAL ext4: avoid infinite loops caused by residual data
CVE-2026-31432 8.8 HIGH ksmbd: fix OOB write in QUERY_INFO for compound requests
CVE-2026-31433 8.8 HIGH ksmbd: fix potencial OOB in get_file_all_info() for compound requests
CVE-2026-31450 8.8 HIGH ext4: publish jinode after initialization
CVE-2026-31435 8.8 HIGH netfs: Fix read abandonment during retry
CVE-2026-31476 8.2 HIGH ksmbd: do not expire session on binding failure
CVE-2026-31464 8.1 HIGH scsi: ibmvfc: Fix OOB access in ibmvfc_discover_targets_done()
CVE-2026-31513 8.1 HIGH Bluetooth: L2CAP: Fix stack-out-of-bounds read in l2cap_ecred_conn_req
CVE-2026-31471 7.8 HIGH xfrm: iptfs: only publish mode_data after clone setup
CVE-2026-31453 7.8 HIGH xfs: avoid dereferencing log items after push callbacks
CVE-2026-31473 7.8 HIGH media: mc, v4l2: serialize REINIT and REQBUFS with req_queue_mutex
CVE-2026-31449 7.8 HIGH ext4: validate p_idx bounds in ext4_ext_correct_indexes
CVE-2026-31454 7.8 HIGH xfs: save ailp before dropping the AIL lock in push callbacks
CVE-2026-31502 7.8 HIGH team: fix header_ops type confusion with non-Ethernet ports
CVE-2026-31469 7.8 HIGH virtio_net: Fix UAF on dst_ops when IFF_XMIT_DST_RELEASE is cleared and napi_tx is false

Showing top 20 of 100 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-31467

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