CVE-2025-22036

Source
https://nvd.nist.gov/vuln/detail/CVE-2025-22036
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-22036.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2025-22036
Downstream
Related
Published
2025-04-16T14:11:54Z
Modified
2025-10-15T23:14:52.578610Z
Severity
  • 7.0 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
exfat: fix random stack corruption after get_block
Details

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

exfat: fix random stack corruption after get_block

When getblock is called with a bufferhead allocated on the stack, such as dompagereadpage, stack corruption due to buffer_head UAF may occur in the following race condition situation.

 <CPU 0>                      <CPU 1>

mpagereadfolio <<bh on stack>> dompagereadpage exfatgetblock bhread _bhread getbh(bh) submitbh waitonbuffer ... endbufferreadsync _endbufferreadnotouch unlockbuffer <<keep going>> ... ... ... ... <<bh is not valid out of mpagereadfolio>> . . anotherfunction <<variable A on stack>> putbh(bh) atomicdec(bh->b_count) * stack corruption here *

This patch returns -EAGAIN if a folio does not have buffers when bhread needs to be called. By doing this, the caller can fallback to functions like blockreadfullfolio(), create a bufferhead in the folio, and then call getblock again.

Let's do not call bhread() with on-stack bufferhead.

References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
11a347fb6cef62ce47e84b97c45f2b2497c7593b
Fixed
49b0a6ab8e528a0c1c50e37cef9b9c7c121365f2
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
11a347fb6cef62ce47e84b97c45f2b2497c7593b
Fixed
f7447286363dc1e410bf30b87d75168f3519f9cc
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
11a347fb6cef62ce47e84b97c45f2b2497c7593b
Fixed
f807a6bf2005740fa26b4f59c4a003dc966b9afd
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
11a347fb6cef62ce47e84b97c45f2b2497c7593b
Fixed
1bb7ff4204b6d4927e982cd256286c09ed4fd8ca

Affected versions

v6.*

v6.10
v6.10-rc1
v6.10-rc2
v6.10-rc3
v6.10-rc4
v6.10-rc5
v6.10-rc6
v6.10-rc7
v6.11
v6.11-rc1
v6.11-rc2
v6.11-rc3
v6.11-rc4
v6.11-rc5
v6.11-rc6
v6.11-rc7
v6.12
v6.12-rc1
v6.12-rc2
v6.12-rc3
v6.12-rc4
v6.12-rc5
v6.12-rc6
v6.12-rc7
v6.12.1
v6.12.10
v6.12.11
v6.12.12
v6.12.13
v6.12.14
v6.12.15
v6.12.16
v6.12.17
v6.12.18
v6.12.19
v6.12.2
v6.12.20
v6.12.21
v6.12.22
v6.12.3
v6.12.4
v6.12.5
v6.12.6
v6.12.7
v6.12.8
v6.12.9
v6.13
v6.13-rc1
v6.13-rc2
v6.13-rc3
v6.13-rc4
v6.13-rc5
v6.13-rc6
v6.13-rc7
v6.13.1
v6.13.10
v6.13.2
v6.13.3
v6.13.4
v6.13.5
v6.13.6
v6.13.7
v6.13.8
v6.13.9
v6.14
v6.14-rc1
v6.14-rc2
v6.14-rc3
v6.14-rc4
v6.14-rc5
v6.14-rc6
v6.14-rc7
v6.14.1
v6.8
v6.8-rc1
v6.8-rc2
v6.8-rc3
v6.8-rc4
v6.8-rc5
v6.8-rc6
v6.8-rc7
v6.9
v6.9-rc1
v6.9-rc2
v6.9-rc3
v6.9-rc4
v6.9-rc5
v6.9-rc6
v6.9-rc7

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
6.8.0
Fixed
6.12.23
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.13.11
Type
ECOSYSTEM
Events
Introduced
6.14.0
Fixed
6.14.2