CVE-2024-38543
lib/test_hmm.c: handle src_pfns and dst_pfns allocation failure
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
In the Linux kernel, the following vulnerability has been resolved:
lib/test_hmm.c: handle src_pfns and dst_pfns allocation failure
The kcalloc() in dmirror_device_evict_chunk() will return null if the
physical memory has run out. As a result, if src_pfns or dst_pfns is
dereferenced, the null pointer dereference bug will happen.
Moreover, the device is going away. If the kcalloc() fails, the pages
mapping a chunk could not be evicted. So add a __GFP_NOFAIL flag in
kcalloc().
Finally, as there is no need to have physically contiguous memory, Switch
kcalloc() to kvcalloc() in order to avoid failing allocations.
En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: lib/test_hmm.c: maneja el error de asignación de src_pfns y dst_pfns El kcalloc() en dmirror_device_evict_chunk() devolverá nulo si la memoria física se ha agotado. Como resultado, si se desreferencia src_pfns o dst_pfns, se producirá el error de desreferencia del puntero nulo. Además, el dispositivo va a desaparecer. Si kcalloc() falla, las páginas que asignan un fragmento no podrán ser desalojadas. Entonces agregue una bandera __GFP_NOFAIL en kcalloc(). Finalmente, como no es necesario tener memoria físicamente contigua, cambie kcalloc() a kvcalloc() para evitar asignaciones fallidas.
CVSS Scores
SSVC
- Decision:Track
Timeline
- 2024-06-18 CVE Reserved
- 2024-06-19 CVE Published
- 2024-08-29 EPSS Updated
- 2024-09-11 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-476: NULL Pointer Dereference
CAPEC
References (8)
| URL | Tag | Source |
|---|---|---|
| https://git.kernel.org/stable/c/b2ef9f5a5cb37643ca5def3516c546457074b882 | Vuln. Introduced |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2024-38543 | 2024-07-17 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2293456 | 2024-07-17 |
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" | >= 5.8 < 6.1.93 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.8 < 6.1.93" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.8 < 6.6.33 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.8 < 6.6.33" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.8 < 6.8.12 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.8 < 6.8.12" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.8 < 6.9.3 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.8 < 6.9.3" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.8 < 6.10 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.8 < 6.10" | en |
Affected
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