cbcvebase.
CVE-2024-26901
published 2024-04-17

CVE-2024-26901: 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…

PriorityP422medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.83%
54.0th percentile
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.

Affected

31 ranges· showing 25
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.85-1 (bookworm)linux 6.1.85-1 (bookworm)
linuxlinux
linuxlinux>= 990d6c2d7aee921e3bce22b2d6a750fd552262be < 4bac28f441e3cc9d3f1a84c8d023228a68d8a7c14bac28f441e3cc9d3f1a84c8d023228a68d8a7c1
linuxlinux>= 990d6c2d7aee921e3bce22b2d6a750fd552262be < 772a7def9868091da3bcb0d6c6ff9f0c03d7fa8b772a7def9868091da3bcb0d6c6ff9f0c03d7fa8b
linuxlinux>= 990d6c2d7aee921e3bce22b2d6a750fd552262be < cde76b3af247f615447bcfecf610bb76c3529126cde76b3af247f615447bcfecf610bb76c3529126
linuxlinux>= 990d6c2d7aee921e3bce22b2d6a750fd552262be < 423b6bdf19bbc5e1f7e7461045099917378f7e71423b6bdf19bbc5e1f7e7461045099917378f7e71
linuxlinux>= 990d6c2d7aee921e3bce22b2d6a750fd552262be < e6450d5e46a737a008b4885aa223486113bf0ad6e6450d5e46a737a008b4885aa223486113bf0ad6
linuxlinux>= 990d6c2d7aee921e3bce22b2d6a750fd552262be < c1362eae861db28b1608b9dc23e49634fe87b63bc1362eae861db28b1608b9dc23e49634fe87b63b
linuxlinux>= 990d6c2d7aee921e3bce22b2d6a750fd552262be < cba138f1ef37ec6f961baeab62f312dedc7cf730cba138f1ef37ec6f961baeab62f312dedc7cf730
linuxlinux>= 990d6c2d7aee921e3bce22b2d6a750fd552262be < bf9ec1b24ab4e94345aa1c60811dd329f069c38bbf9ec1b24ab4e94345aa1c60811dd329f069c38b
linuxlinux>= 990d6c2d7aee921e3bce22b2d6a750fd552262be < 3948abaa4e2be938ccdfc289385a27342fb13d433948abaa4e2be938ccdfc289385a27342fb13d43
linuxlinux_kernel>= 0 < 5.10.216-15.10.216-1
linuxlinux_kernel>= 0 < 6.1.85-16.1.85-1
linuxlinux_kernel>= 0 < 6.7.12-16.7.12-1
linuxlinux_kernel>= 0 < 6.7.12-16.7.12-1
linuxlinux_kernel>= 0 < 5.4.0-189.2095.4.0-189.209
linuxlinux_kernel>= 0 < 5.15.0-112.1225.15.0-112.122
linuxlinux_kernel>= 0 < 6.8.0-35.356.8.0-35.35
linuxlinux_kernel>= 0 < 4.4.0-257.2914.4.0-257.291
linuxlinux_kernel>= 2.6.39 < 4.19.3114.19.311
linuxlinux_kernel>= 4.20 < 5.4.2735.4.273
linuxlinux_kernel>= 5.11 < 5.15.1535.15.153
linuxlinux_kernel>= 5.16 < 6.1.836.1.83
linuxlinux_kernel>= 5.5 < 5.10.2145.10.214
linuxlinux_kernel>= 6.2 < 6.6.236.6.23

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv7.0HIGH
vendor_ubuntu7.0HIGH
vendor_debian5.5MEDIUM
vendor_msrc5.5MEDIUM
vendor_redhat5.5MEDIUM
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