CVE-2024-36000
mm/hugetlb: fix missing hugetlb_lock for resv uncharge
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
In the Linux kernel, the following vulnerability has been resolved:
mm/hugetlb: fix missing hugetlb_lock for resv uncharge
There is a recent report on UFFDIO_COPY over hugetlb:
https://lore.kernel.org/all/000000000000ee06de0616177560@google.com/
350: lockdep_assert_held(&hugetlb_lock);
Should be an issue in hugetlb but triggered in an userfault context, where
it goes into the unlikely path where two threads modifying the resv map
together. Mike has a fix in that path for resv uncharge but it looks like
the locking criteria was overlooked: hugetlb_cgroup_uncharge_folio_rsvd()
will update the cgroup pointer, so it requires to be called with the lock
held.
En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mm/hugetlb: corrige la falta de Hugetlb_lock para descarga de resv. Hay un informe reciente sobre UFFDIO_COPY sobre Hugetlb: https://lore.kernel.org/all/000000000000ee06de0616177560@google.com/ 350: lockdep_assert_held(&hugetlb_lock); Debería ser un problema en hugetlb pero se activa en un contexto de error de usuario, donde entra en la ruta poco probable en la que dos subprocesos modifican el mapa resv juntos. Mike tiene una solución en esa ruta para la descarga de resv, pero parece que se pasó por alto el criterio de bloqueo: hugetlb_cgroup_uncharge_folio_rsvd() actualizará el puntero de cgroup, por lo que es necesario llamarlo con el bloqueo retenido.
CVE-2024-36000 addresses a synchronization issue in the Linux kernel's management of huge pages. The problem arises when multiple threads modify the reservation map concurrently without proper locking, leading to potential inconsistencies and system instability.
CVSS Scores
SSVC
- Decision:Track
Timeline
- 2024-05-17 CVE Reserved
- 2024-05-20 CVE Published
- 2024-05-21 EPSS Updated
- 2024-12-19 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
CAPEC
References (8)
| URL | Tag | Source |
|---|---|---|
| https://git.kernel.org/stable/c/79aa925bf239c234be8586780e482872dc4690dd | Vuln. Introduced | |
| https://git.kernel.org/stable/c/f87004c0b2bdf0f1066b88795d8e6c1dfad6cea0 | Vuln. Introduced |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2024-36000 | 2024-09-11 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2281968 | 2024-09-11 |
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" | >= 5.10 < 6.1.91 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.10 < 6.1.91" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.10 < 6.6.30 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.10 < 6.6.30" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.10 < 6.8.9 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.10 < 6.8.9" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.10 < 6.9 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.10 < 6.9" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 5.9.7 Search vendor "Linux" for product "Linux Kernel" and version "5.9.7" | en |
Affected
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