CVE-2024-46762
Xen Privcmd Kernel-use-After-Free Information Disclosure
Description
In the Linux kernel, the following vulnerability has been resolved: xen: privcmd: Fix possible access to a freed kirqfd instance Nothing prevents simultaneous ioctl calls to privcmd_irqfd_assign() and privcmd_irqfd_deassign(). If that happens, it is possible that a kirqfd created and added to the irqfds_list by privcmd_irqfd_assign() may get removed by another thread executing privcmd_irqfd_deassign(), while the former is still using it after dropping the locks. This can lead to a situation where an already freed kirqfd instance may be accessed and cause kernel oops. Use SRCU locking to prevent the same, as is done for the KVM implementation for irqfds.
INFO
Published Date :
Sept. 18, 2024, 8:15 a.m.
Last Modified :
Sept. 23, 2024, 4:12 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-2024-46762.
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CVE-2024-46762 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2024-46762 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]
Sep. 23, 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/112fd2f02b308564724b8e81006c254d20945c4b No Types Assigned https://git.kernel.org/stable/c/112fd2f02b308564724b8e81006c254d20945c4b Patch Changed Reference Type https://git.kernel.org/stable/c/611ff1b1ae989a7bcce3e2a8e132ee30e968c557 No Types Assigned https://git.kernel.org/stable/c/611ff1b1ae989a7bcce3e2a8e132ee30e968c557 Patch Changed Reference Type https://git.kernel.org/stable/c/e997b357b13a7d95de31681fc54fcc34235fa527 No Types Assigned https://git.kernel.org/stable/c/e997b357b13a7d95de31681fc54fcc34235fa527 Patch Added CWE NIST CWE-416 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (excluding) 6.6.51 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.10.10 -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Sep. 18, 2024
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: xen: privcmd: Fix possible access to a freed kirqfd instance Nothing prevents simultaneous ioctl calls to privcmd_irqfd_assign() and privcmd_irqfd_deassign(). If that happens, it is possible that a kirqfd created and added to the irqfds_list by privcmd_irqfd_assign() may get removed by another thread executing privcmd_irqfd_deassign(), while the former is still using it after dropping the locks. This can lead to a situation where an already freed kirqfd instance may be accessed and cause kernel oops. Use SRCU locking to prevent the same, as is done for the KVM implementation for irqfds. Added Reference kernel.org https://git.kernel.org/stable/c/e997b357b13a7d95de31681fc54fcc34235fa527 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/112fd2f02b308564724b8e81006c254d20945c4b [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/611ff1b1ae989a7bcce3e2a8e132ee30e968c557 [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-2024-46762 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-2024-46762
weaknesses.