CVE-2026-31447CWE-20

CVE-2026-31447

High · published April 22, 2026

CVSS v3.1
7.8
EPSS
0%
Percentile
8.9
In the wild
Unconfirmed
What it is

In the Linux kernel, the following vulnerability has been resolved:

ext4: reject mount if bigalloc with s_first_data_block != 0

bigalloc with s_first_data_block != 0 is not supported, reject mounting

it.

The record
Technical detail
CVSS v3.1
7.8 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00197 · 8.9th percentile
Weakness
CWE-20 · Improper Input Validation
Published
2026-04-22T18:16Z
Affected products (12)
ProductVersionsFixed in
linux/linux_kernel≥ 3.2, < 5.10.2535.10.253
linux/linux_kernel≥ 5.11, < 5.15.2035.15.203
linux/linux_kernel≥ 5.16, < 6.1.1686.1.168
linux/linux_kernel≥ 6.2, < 6.6.1316.6.131
linux/linux_kernel≥ 6.7, < 6.12.806.12.80
linux/linux_kernel≥ 6.13, < 6.18.216.18.21
linux/linux_kernel≥ 6.19, < 6.19.116.19.11
linux/linux_kernelall versions—
linux/linux_kernelall versions—
linux/linux_kernelall versions—
linux/linux_kernelall versions—
linux/linux_kernelall versions—
References (11)
https://git.kernel.org/stable/c/3822743dc20386d9897e999dbb990befa3a5b3f8 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3a926957cc95899ef88529710836edadc03c71a1 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5ad6d994255e27a3254079dfb50ca861fc31f2d0 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7b58c110b4e1f028eb38eec9ed3555e9be81c8b0 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7d5b04290156c3fc316eecc86a4f9d201ab7d44a · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ad1f6d608f33f59d21a3d025615d6786a6443998 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b77de3fceafbb39f30e4ff5dc986f863d5456417 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d787d3ae96648dc14a3b7ca8fde817177e82c1c7 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://cert-portal.siemens.com/productcert/html/ssa-019113.html · 0b142b55-0307-4c5a-b3c9-f314f3fb7c5ehttps://cert-portal.siemens.com/productcert/html/ssa-082556.html · 0b142b55-0307-4c5a-b3c9-f314f3fb7c5ehttps://cert-portal.siemens.com/productcert/html/ssa-457936.html · 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
EPSS history
Timeline
  • 22 APR 13:53Z
    ext4: reject mount if bigalloc with s_first_data_block != 0
    cvelistv5