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CVE-2026-97487

Linux: jfs: 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 in87d6852f06c5a29f757f7b7ad1423e4cbd0f2cadAlso 153374ee67a458c77b5755d3cc57fbdc639d327e, 05107f5602751fcfd3d108c1f579eb45aabead52CVE List
Published24 Sep 2026Updated 3 Oct 2026CVE List

What fixes it

  • 87d6852f06c5a29f757f7b7ad1423e4cbd0f2cadLinuxCVE List
  • 153374ee67a458c77b5755d3cc57fbdc639d327eLinuxCVE List
  • 05107f5602751fcfd3d108c1f579eb45aabead52LinuxCVE 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:

jfs: handle set_blocksize failures

jfs uses buffer_heads, which don't handle block size > PAGE_SIZE well. Without this, mounting we 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 e2712fa5c02cd1b3e40d45bc8ce581f3c67bf4b4CVE List
  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before deb9400a38849e03210c9169b777e89e74debe96CVE List
  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before a0eaa3f4b6dcc829228752f6255f0e45cc94b273CVE List
  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 87d6852f06c5a29f757f7b7ad1423e4cbd0f2cadCVE List
  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before a0ac22af8acca6ea6c57aff72662086cb3243b1cCVE List
  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 153374ee67a458c77b5755d3cc57fbdc639d327eCVE List
  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 05107f5602751fcfd3d108c1f579eb45aabead52CVE 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