CVE-2022-49004
RISC-V Linux EFI Page Table Mapping Vulnerability
Description
In the Linux kernel, the following vulnerability has been resolved: riscv: Sync efi page table's kernel mappings before switching The EFI page table is initially created as a copy of the kernel page table. With VMAP_STACK enabled, kernel stacks are allocated in the vmalloc area: if the stack is allocated in a new PGD (one that was not present at the moment of the efi page table creation or not synced in a previous vmalloc fault), the kernel will take a trap when switching to the efi page table when the vmalloc kernel stack is accessed, resulting in a kernel panic. Fix that by updating the efi kernel mappings before switching to the efi page table.
INFO
Published Date :
Oct. 21, 2024, 8:15 p.m.
Last Modified :
Oct. 25, 2024, 2:21 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
1.8
References to Advisories, Solutions, and Tools
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CVE-2022-49004.
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The following list is the news that have been mention
CVE-2022-49004 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2022-49004 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Oct. 25, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://git.kernel.org/stable/c/3f105a742725a1b78766a55169f1d827732e62b8 No Types Assigned https://git.kernel.org/stable/c/3f105a742725a1b78766a55169f1d827732e62b8 Patch Changed Reference Type https://git.kernel.org/stable/c/96f479383d92944406d4b3f2bc03c2f640def9f1 No Types Assigned https://git.kernel.org/stable/c/96f479383d92944406d4b3f2bc03c2f640def9f1 Patch Changed Reference Type https://git.kernel.org/stable/c/fa7a7d185ef380546b4b1fed6f84f31dbae8cec7 No Types Assigned https://git.kernel.org/stable/c/fa7a7d185ef380546b4b1fed6f84f31dbae8cec7 Patch Added CWE NIST NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.10 up to (excluding) 5.15.82 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.0.12 *cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.1:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.1:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.1:rc6:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.1:rc7:*:*:*:*:*:* -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Oct. 21, 2024
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: riscv: Sync efi page table's kernel mappings before switching The EFI page table is initially created as a copy of the kernel page table. With VMAP_STACK enabled, kernel stacks are allocated in the vmalloc area: if the stack is allocated in a new PGD (one that was not present at the moment of the efi page table creation or not synced in a previous vmalloc fault), the kernel will take a trap when switching to the efi page table when the vmalloc kernel stack is accessed, resulting in a kernel panic. Fix that by updating the efi kernel mappings before switching to the efi page table. Added Reference kernel.org https://git.kernel.org/stable/c/fa7a7d185ef380546b4b1fed6f84f31dbae8cec7 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/96f479383d92944406d4b3f2bc03c2f640def9f1 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/3f105a742725a1b78766a55169f1d827732e62b8 [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2022-49004 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2022-49004
weaknesses.