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CVE-2026-97489

Linux: bfs: handle set_blocksize failures

Linux LinuxOperating systems
Open in ThreatlineRecord JSON
CVSS
NoneNot scored
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.17%Chance of exploitation activity in the next 30 days, higher than 6% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in965b53ee91cfda3faf8bd0d0ffff5f70c7d1c479Also 0fe260d82555ffebfb627cd23cbb6e880399804c, 8a96010d230a8c83181137d88bad4bf71d862628 and 2 moreCVE List
Published24 Sep 2026Updated 3 Oct 2026CVE List

What fixes it

  • 965b53ee91cfda3faf8bd0d0ffff5f70c7d1c479LinuxCVE List
  • 0fe260d82555ffebfb627cd23cbb6e880399804cLinuxCVE List
  • 8a96010d230a8c83181137d88bad4bf71d862628LinuxCVE List
  • 7cc713b29eecc0189a184e82f42d174fddaa9e1eLinuxCVE List
  • 2430e3380936df0b648af720cae624eef035a2d1LinuxCVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

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.

Text from CVE List

Affected versions 16

  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 965b53ee91cfda3faf8bd0d0ffff5f70c7d1c479CVE List
  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 0fe260d82555ffebfb627cd23cbb6e880399804cCVE List
  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before c6d069c34d57414c039167967ef826a8516c98f3CVE List
  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 8a96010d230a8c83181137d88bad4bf71d862628CVE List
  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 7cc713b29eecc0189a184e82f42d174fddaa9e1eCVE List
  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before ab1d6160d26e6ee8939e994999be9b45e90a42efCVE List
  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 2430e3380936df0b648af720cae624eef035a2d1CVE List
  • Linuxaffected: 2.6.12CVE List
  • Linuxunaffected: all versions before 2.6.12CVE List
  • Linuxunaffected: 5.10.271 through 5.10.*CVE List
  • Linuxunaffected: 5.15.222 through 5.15.*CVE List
  • Linuxunaffected: 6.1.189 through 6.1.*CVE List
  • Linuxunaffected: 6.6.158 through 6.6.*CVE List
  • Linuxunaffected: 6.12.111 through 6.12.*CVE List
  • Linuxunaffected: 6.18.53 through 6.18.*CVE List
  • Linuxunaffected: 7.2CVE List

References 7