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CVE-2026-97489— bfs: handle set_blocksize failures

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.

在 Linux 内核中，已修复以下漏洞： bfs：处理 set_blocksize 失败的情况 bfs 使用 buffer_heads，而 buffer_heads 在处理大于 PAGE_SIZE 的块大小方面存在不足。若不进行此修复，在首次调用 __bread_gfp 时，挂载操作将触发 folio_set_bh 中的以下 BUG_ON 检查失败： BUG_ON(offset >= folio_size(folio));

AI Predicted 4.3 Difficulty: Easy EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 965b53ee91cfda3faf8bd0d0ffff5f70c7d1c479 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 0fe260d82555ffebfb627cd23cbb6e880399804c affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< c6d069c34d57414c039167967ef826a8516c98f3 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 8a96010d230a8c83181137d88bad4bf71d862628 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 7cc713b29eecc0189a184e82f42d174fddaa9e1e affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< ab1d6160d26e6ee8939e994999be9b45e90a42ef affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 2430e3380936df0b648af720cae624eef035a2d1 affected
2.6.12 affected
… +8 more rows
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I. Basic Information for CVE-2026-97489

Vulnerability Information
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Vulnerability Title
bfs: handle set_blocksize failures
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: bfs: handle set_blocksize failures bfs uses buffer_heads, which don't handle block size > PAGE_SIZE well. Without this, mounting will hit the BUG_ON(offset >= folio_size(folio)); in folio_set_bh on the first __bread_gfp call.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ~ 965b53ee91cfda3faf8bd0d0ffff5f70c7d1c479 -
Linux Linux 2.6.12 -

II. Public POCs for CVE-2026-97489

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III. Intelligence Information for CVE-2026-97489

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Patches & Fixes for CVE-2026-97489 (7)

Same Patch Batch · Linux · 2026-09-24 · 234 CVEs total

CVE-2026-93207 9.8 CRITICAL SUNRPC: Zero rpc_gss_wire_cred at svcauth_gss_decode_credbody() entry
CVE-2026-97413 9.8 CRITICAL RDMA/rtrs-srv: Fix integer underflow in process_read and process_write
CVE-2026-93228 9.1 CRITICAL svcrdma: Reject Write/Reply chunks with segcount 0
CVE-2026-93799 8.8 HIGH wifi: iwlwifi: mvm: validate sta_id in BA window status notif
CVE-2026-97442 8.8 HIGH wifi: ath11k: fix invalid data access in ath11k_dp_rx_h_undecap_nwifi
CVE-2026-97409 8.8 HIGH nvme-fc: Do not cancel requests in io target before it is initialized
CVE-2026-93806 8.8 HIGH wifi: cfg80211: validate assoc response length before status and IE access
CVE-2026-93793 8.8 HIGH wifi: iwlwifi: mvm: validate TX_CMD response layout
CVE-2026-93790 8.8 HIGH wifi: iwlwifi: mvm: fix out-of-bounds tid_data access in BA notif
CVE-2026-93284 8.8 HIGH drm/pagemap: dma-unmap pages before handling migration errors
CVE-2026-93280 8.8 HIGH greybus: audio: bound the topology section sizes against the fetched size
CVE-2026-97509 8.8 HIGH thunderbolt: Keep XDomain reference during the lifetime of a service
CVE-2026-93827 8.4 HIGH virtio-fs: avoid double-free on failed queue setup
CVE-2026-97450 8.4 HIGH ACPICA: validate handler object type in two places
CVE-2026-97451 8.4 HIGH ACPICA: Fix integer overflow in acpi_ex_opcode_3A_1T_1R() (mid_op)
CVE-2026-97452 8.4 HIGH ACPICA: Prevent adding invalid references
CVE-2026-97455 8.4 HIGH ACPICA: Fix use-after-free in acpi_ds_terminate_control_method()
CVE-2026-97433 8.2 HIGH nvme: validate FDP configuration descriptor sizes
CVE-2026-93221 8.1 HIGH nfsd: convert nfsd_net boolean flags to unsigned long flags word
CVE-2026-93786 8.1 HIGH ksmbd: preserve VFS inherited POSIX ACL mask

Showing top 20 of 234 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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