CVE - CVE-2024-26901

CVE-ID
CVE-2024-26901	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: do_sys_name_to_handle(): use kzalloc() to fix kernel-infoleak syzbot identified a kernel information leak vulnerability in do_sys_name_to_handle() and issued the following report [1]. [1] "BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline] BUG: KMSAN: kernel-infoleak in _copy_to_user+0xbc/0x100 lib/usercopy.c:40 instrument_copy_to_user include/linux/instrumented.h:114 [inline] _copy_to_user+0xbc/0x100 lib/usercopy.c:40 copy_to_user include/linux/uaccess.h:191 [inline] do_sys_name_to_handle fs/fhandle.c:73 [inline] __do_sys_name_to_handle_at fs/fhandle.c:112 [inline] __se_sys_name_to_handle_at+0x949/0xb10 fs/fhandle.c:94 __x64_sys_name_to_handle_at+0xe4/0x140 fs/fhandle.c:94 ... Uninit was created at: slab_post_alloc_hook+0x129/0xa70 mm/slab.h:768 slab_alloc_node mm/slub.c:3478 [inline] __kmem_cache_alloc_node+0x5c9/0x970 mm/slub.c:3517 __do_kmalloc_node mm/slab_common.c:1006 [inline] __kmalloc+0x121/0x3c0 mm/slab_common.c:1020 kmalloc include/linux/slab.h:604 [inline] do_sys_name_to_handle fs/fhandle.c:39 [inline] __do_sys_name_to_handle_at fs/fhandle.c:112 [inline] __se_sys_name_to_handle_at+0x441/0xb10 fs/fhandle.c:94 __x64_sys_name_to_handle_at+0xe4/0x140 fs/fhandle.c:94 ... Bytes 18-19 of 20 are uninitialized Memory access of size 20 starts at ffff888128a46380 Data copied to user address 0000000020000240" Per Chuck Lever's suggestion, use kzalloc() instead of kmalloc() to solve the problem.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/3948abaa4e2be938ccdfc289385a27342fb13d43 URL:https://git.kernel.org/stable/c/3948abaa4e2be938ccdfc289385a27342fb13d43 MISC:https://git.kernel.org/stable/c/423b6bdf19bbc5e1f7e7461045099917378f7e71 URL:https://git.kernel.org/stable/c/423b6bdf19bbc5e1f7e7461045099917378f7e71 MISC:https://git.kernel.org/stable/c/4bac28f441e3cc9d3f1a84c8d023228a68d8a7c1 URL:https://git.kernel.org/stable/c/4bac28f441e3cc9d3f1a84c8d023228a68d8a7c1 MISC:https://git.kernel.org/stable/c/772a7def9868091da3bcb0d6c6ff9f0c03d7fa8b URL:https://git.kernel.org/stable/c/772a7def9868091da3bcb0d6c6ff9f0c03d7fa8b MISC:https://git.kernel.org/stable/c/bf9ec1b24ab4e94345aa1c60811dd329f069c38b URL:https://git.kernel.org/stable/c/bf9ec1b24ab4e94345aa1c60811dd329f069c38b MISC:https://git.kernel.org/stable/c/c1362eae861db28b1608b9dc23e49634fe87b63b URL:https://git.kernel.org/stable/c/c1362eae861db28b1608b9dc23e49634fe87b63b MISC:https://git.kernel.org/stable/c/cba138f1ef37ec6f961baeab62f312dedc7cf730 URL:https://git.kernel.org/stable/c/cba138f1ef37ec6f961baeab62f312dedc7cf730 MISC:https://git.kernel.org/stable/c/cde76b3af247f615447bcfecf610bb76c3529126 URL:https://git.kernel.org/stable/c/cde76b3af247f615447bcfecf610bb76c3529126 MISC:https://git.kernel.org/stable/c/e6450d5e46a737a008b4885aa223486113bf0ad6 URL:https://git.kernel.org/stable/c/e6450d5e46a737a008b4885aa223486113bf0ad6
Assigning CNA
kernel.org
Date Record Created
20240219	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240219)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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