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
- 2025-10-22T10:47:13.250099Z
- 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
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/1bb7ff4204b6d4927e982cd256286c09ed4fd8ca
- https://git.kernel.org/stable/c/49b0a6ab8e528a0c1c50e37cef9b9c7c121365f2
- https://git.kernel.org/stable/c/f7447286363dc1e410bf30b87d75168f3519f9cc
- https://git.kernel.org/stable/c/f807a6bf2005740fa26b4f59c4a003dc966b9afd
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
-
Introduced11a347fb6cef62ce47e84b97c45f2b2497c7593bFixed49b0a6ab8e528a0c1c50e37cef9b9c7c121365f2
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced11a347fb6cef62ce47e84b97c45f2b2497c7593bFixedf7447286363dc1e410bf30b87d75168f3519f9cc
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced11a347fb6cef62ce47e84b97c45f2b2497c7593bFixedf807a6bf2005740fa26b4f59c4a003dc966b9afd
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced11a347fb6cef62ce47e84b97c45f2b2497c7593bFixed1bb7ff4204b6d4927e982cd256286c09ed4fd8ca