CVE-2024-26603
Linux Kernel x86 FPU Information Disclosure.fetchall
Description
In the Linux kernel, the following vulnerability has been resolved: x86/fpu: Stop relying on userspace for info to fault in xsave buffer Before this change, the expected size of the user space buffer was taken from fx_sw->xstate_size. fx_sw->xstate_size can be changed from user-space, so it is possible construct a sigreturn frame where: * fx_sw->xstate_size is smaller than the size required by valid bits in fx_sw->xfeatures. * user-space unmaps parts of the sigrame fpu buffer so that not all of the buffer required by xrstor is accessible. In this case, xrstor tries to restore and accesses the unmapped area which results in a fault. But fault_in_readable succeeds because buf + fx_sw->xstate_size is within the still mapped area, so it goes back and tries xrstor again. It will spin in this loop forever. Instead, fault in the maximum size which can be touched by XRSTOR (taken from fpstate->user_size). [ dhansen: tweak subject / changelog ]
INFO
Published Date :
Feb. 26, 2024, 4:28 p.m.
Last Modified :
April 17, 2024, 6 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
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2024-26603.
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-2024-26603 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2024-26603 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 Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 29, 2024
Action Type Old Value New Value -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Apr. 17, 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/627339cccdc9166792ecf96bc3c9f711a60ce996 No Types Assigned https://git.kernel.org/stable/c/627339cccdc9166792ecf96bc3c9f711a60ce996 Patch Changed Reference Type https://git.kernel.org/stable/c/627e28cbb65564e55008315d9e02fbb90478beda No Types Assigned https://git.kernel.org/stable/c/627e28cbb65564e55008315d9e02fbb90478beda Patch Changed Reference Type https://git.kernel.org/stable/c/8bd3eee7720c14b59a206bd05b98d7586bccf99a No Types Assigned https://git.kernel.org/stable/c/8bd3eee7720c14b59a206bd05b98d7586bccf99a Patch Changed Reference Type https://git.kernel.org/stable/c/b2479ab426cef7ab79a13005650eff956223ced2 No Types Assigned https://git.kernel.org/stable/c/b2479ab426cef7ab79a13005650eff956223ced2 Patch Changed Reference Type https://git.kernel.org/stable/c/d877550eaf2dc9090d782864c96939397a3c6835 No Types Assigned https://git.kernel.org/stable/c/d877550eaf2dc9090d782864c96939397a3c6835 Patch Added CWE NIST CWE-835 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.14.0 up to (excluding) 5.15.150 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16.0 up to (excluding) 6.1.79 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2.0 up to (excluding) 6.6.18 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7.0 up to (excluding) 6.7.6 -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Mar. 01, 2024
Action Type Old Value New Value Added Reference Linux https://git.kernel.org/stable/c/8bd3eee7720c14b59a206bd05b98d7586bccf99a [No types assigned] Removed Reference Linux https://lists.fedoraproject.org/archives/list/[email protected]/message/EZOU3745CWCDZ7EMKMXB2OEEIB5Q3IWM/ Removed Reference Linux https://lists.fedoraproject.org/archives/list/[email protected]/message/OX4EWCYDZRTOEMC2C6OF7ZACAP23SUB5/ -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Feb. 28, 2024
Action Type Old Value New Value Added Reference Linux https://lists.fedoraproject.org/archives/list/[email protected]/message/EZOU3745CWCDZ7EMKMXB2OEEIB5Q3IWM/ [No types assigned] Added Reference Linux https://lists.fedoraproject.org/archives/list/[email protected]/message/OX4EWCYDZRTOEMC2C6OF7ZACAP23SUB5/ [No types assigned] -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Feb. 26, 2024
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: x86/fpu: Stop relying on userspace for info to fault in xsave buffer Before this change, the expected size of the user space buffer was taken from fx_sw->xstate_size. fx_sw->xstate_size can be changed from user-space, so it is possible construct a sigreturn frame where: * fx_sw->xstate_size is smaller than the size required by valid bits in fx_sw->xfeatures. * user-space unmaps parts of the sigrame fpu buffer so that not all of the buffer required by xrstor is accessible. In this case, xrstor tries to restore and accesses the unmapped area which results in a fault. But fault_in_readable succeeds because buf + fx_sw->xstate_size is within the still mapped area, so it goes back and tries xrstor again. It will spin in this loop forever. Instead, fault in the maximum size which can be touched by XRSTOR (taken from fpstate->user_size). [ dhansen: tweak subject / changelog ] Added Reference Linux https://git.kernel.org/stable/c/627339cccdc9166792ecf96bc3c9f711a60ce996 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/b2479ab426cef7ab79a13005650eff956223ced2 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/627e28cbb65564e55008315d9e02fbb90478beda [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/d877550eaf2dc9090d782864c96939397a3c6835 [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-2024-26603 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-2024-26603
weaknesses.