CVE-2025-21740
KVM Linux Kernel NULL Pointer Dereference Vulnerability
Description
Rejected reason: This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.
INFO
Published Date :
Feb. 27, 2025, 3:15 a.m.
Last Modified :
March 27, 2025, 2:15 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
1.8
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-21740 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-21740 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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CVE Rejected by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Mar. 27, 2025
Action Type Old Value New Value -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Mar. 27, 2025
Action Type Old Value New Value Changed Description In the Linux kernel, the following vulnerability has been resolved: KVM: x86/mmu: Ensure NX huge page recovery thread is alive before waking When waking a VM's NX huge page recovery thread, ensure the thread is actually alive before trying to wake it. Now that the thread is spawned on-demand during KVM_RUN, a VM without a recovery thread is reachable via the related module params. BUG: kernel NULL pointer dereference, address: 0000000000000040 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015 RIP: 0010:vhost_task_wake+0x5/0x10 Call Trace: <TASK> set_nx_huge_pages+0xcc/0x1e0 [kvm] param_attr_store+0x8a/0xd0 module_attr_store+0x1a/0x30 kernfs_fop_write_iter+0x12f/0x1e0 vfs_write+0x233/0x3e0 ksys_write+0x60/0xd0 do_syscall_64+0x5b/0x160 entry_SYSCALL_64_after_hwframe+0x4b/0x53 RIP: 0033:0x7f3b52710104 </TASK> Modules linked in: kvm_intel kvm CR2: 0000000000000040 Rejected reason: This CVE ID has been rejected or withdrawn by its CVE Numbering Authority. Removed CVSS V3.1 NIST: AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Removed CWE NIST: CWE-476 Removed CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:* Removed Reference kernel.org: https://git.kernel.org/stable/c/2b3928b7c896e5a9fb6b1373924adafe8e01a0c6 Removed Reference kernel.org: https://git.kernel.org/stable/c/43fb96ae78551d7bfa4ecca956b258f085d67c40 Removed Reference kernel.org: https://git.kernel.org/stable/c/974f85f1f7eb7dc7fce0988046e06eeccab576a7 Removed Reference Type kernel.org: https://git.kernel.org/stable/c/2b3928b7c896e5a9fb6b1373924adafe8e01a0c6 Types: Patch Removed Reference Type kernel.org: https://git.kernel.org/stable/c/43fb96ae78551d7bfa4ecca956b258f085d67c40 Types: Patch Removed Reference Type kernel.org: https://git.kernel.org/stable/c/974f85f1f7eb7dc7fce0988046e06eeccab576a7 Types: Patch -
Initial Analysis by [email protected]
Mar. 06, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-476 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:* Added Reference Type kernel.org: https://git.kernel.org/stable/c/2b3928b7c896e5a9fb6b1373924adafe8e01a0c6 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/43fb96ae78551d7bfa4ecca956b258f085d67c40 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/974f85f1f7eb7dc7fce0988046e06eeccab576a7 Types: Patch -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Feb. 27, 2025
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: KVM: x86/mmu: Ensure NX huge page recovery thread is alive before waking When waking a VM's NX huge page recovery thread, ensure the thread is actually alive before trying to wake it. Now that the thread is spawned on-demand during KVM_RUN, a VM without a recovery thread is reachable via the related module params. BUG: kernel NULL pointer dereference, address: 0000000000000040 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015 RIP: 0010:vhost_task_wake+0x5/0x10 Call Trace: <TASK> set_nx_huge_pages+0xcc/0x1e0 [kvm] param_attr_store+0x8a/0xd0 module_attr_store+0x1a/0x30 kernfs_fop_write_iter+0x12f/0x1e0 vfs_write+0x233/0x3e0 ksys_write+0x60/0xd0 do_syscall_64+0x5b/0x160 entry_SYSCALL_64_after_hwframe+0x4b/0x53 RIP: 0033:0x7f3b52710104 </TASK> Modules linked in: kvm_intel kvm CR2: 0000000000000040 Added Reference https://git.kernel.org/stable/c/2b3928b7c896e5a9fb6b1373924adafe8e01a0c6 Added Reference https://git.kernel.org/stable/c/43fb96ae78551d7bfa4ecca956b258f085d67c40 Added Reference https://git.kernel.org/stable/c/974f85f1f7eb7dc7fce0988046e06eeccab576a7
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-21740 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-2025-21740
weaknesses.