CVE-2024-40913
cachefiles: defer exposing anon_fd until after copy_to_user() succeeds
Severity Score
"-"
*CVSS v-
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
Track
*SSVC
Descriptions
In the Linux kernel, the following vulnerability has been resolved:
cachefiles: defer exposing anon_fd until after copy_to_user() succeeds
After installing the anonymous fd, we can now see it in userland and close
it. However, at this point we may not have gotten the reference count of
the cache, but we will put it during colse fd, so this may cause a cache
UAF.
So grab the cache reference count before fd_install(). In addition, by
kernel convention, fd is taken over by the user land after fd_install(),
and the kernel should not call close_fd() after that, i.e., it should call
fd_install() after everything is ready, thus fd_install() is called after
copy_to_user() succeeds.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
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* Common Vulnerability Scoring System
SSVC
- Decision:Track
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2024-07-12 CVE Reserved
- 2024-07-12 CVE Published
- 2024-07-13 EPSS Updated
- 2024-09-11 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
CAPEC
References (5)
URL | Tag | Source |
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https://git.kernel.org/stable/c/c8383054506c77b814489c09877b5db83fd4abf2 | Vuln. Introduced |
URL | Date | SRC |
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URL | Date | SRC |
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Affected Vendors, Products, and Versions
Vendor | Product | Version | Other | Status | ||||||
---|---|---|---|---|---|---|---|---|---|---|
Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.19 < 6.1.95 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.19 < 6.1.95" | en |
Affected
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Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.19 < 6.6.35 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.19 < 6.6.35" | en |
Affected
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Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.19 < 6.9.6 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.19 < 6.9.6" | en |
Affected
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Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.19 < 6.10 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.19 < 6.10" | en |
Affected
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