7.1 CVE-2024-35849

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix information leak in btrfs_ioctl_logical_to_ino() Syzbot reported the following information leak for in btrfs_ioctl_logical_to_ino(): BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline] BUG: KMSAN: kernel-infoleak in _copy_to_user+0xbc/0x110 lib/usercopy.c:40 instrument_copy_to_user include/linux/instrumented.h:114 [inline] _copy_to_user+0xbc/0x110 lib/usercopy.c:40 copy_to_user include/linux/uaccess.h:191 [inline] btrfs_ioctl_logical_to_ino+0x440/0x750 fs/btrfs/ioctl.c:3499 btrfs_ioctl+0x714/0x1260 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:904 [inline] __se_sys_ioctl+0x261/0x450 fs/ioctl.c:890 __x64_sys_ioctl+0x96/0xe0 fs/ioctl.c:890 x64_sys_call+0x1883/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:17 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was created at: __kmalloc_large_node+0x231/0x370 mm/slub.c:3921 __do_kmalloc_node mm/slub.c:3954 [inline] __kmalloc_node+0xb07/0x1060 mm/slub.c:3973 kmalloc_node include/linux/slab.h:648 [inline] kvmalloc_node+0xc0/0x2d0 mm/util.c:634 kvmalloc include/linux/slab.h:766 [inline] init_data_container+0x49/0x1e0 fs/btrfs/backref.c:2779 btrfs_ioctl_logical_to_ino+0x17c/0x750 fs/btrfs/ioctl.c:3480 btrfs_ioctl+0x714/0x1260 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:904 [inline] __se_sys_ioctl+0x261/0x450 fs/ioctl.c:890 __x64_sys_ioctl+0x96/0xe0 fs/ioctl.c:890 x64_sys_call+0x1883/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:17 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Bytes 40-65535 of 65536 are uninitialized Memory access of size 65536 starts at ffff888045a40000 This happens, because we're copying a 'struct btrfs_data_container' back to user-space. This btrfs_data_container is allocated in 'init_data_container()' via kvmalloc(), which does not zero-fill the memory. Fix this by using kvzalloc() which zeroes out the memory on allocation.
https://nvd.nist.gov/vuln/detail/CVE-2024-35849

Categories

CWE-908 : Use of Uninitialized Resource
When a resource has not been properly initialized, the product may behave unexpectedly. This may lead to a crash or invalid memory access, but the consequences vary depending on the type of resource and how it is used within the product.

References

 

AFFECTED (from MITRE)

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Vendor	Product	Versions
Linux	Linux	a542ad1bafc7df9fc16de8a6894b350a4df75572 < 689efe22e9b5b7d9d523119a9a5c3c17107a0772 [affected] a542ad1bafc7df9fc16de8a6894b350a4df75572 < 73db209dcd4ae026021234d40cfcb2fb5b564b86 [affected] a542ad1bafc7df9fc16de8a6894b350a4df75572 < 30189e54ba80e3209d34cfeea87b848f6ae025e6 [affected] a542ad1bafc7df9fc16de8a6894b350a4df75572 < e58047553a4e859dafc8d1d901e1de77c9dd922d [affected] a542ad1bafc7df9fc16de8a6894b350a4df75572 < 8bdbcfaf3eac42f98e5486b3d7e130fa287811f6 [affected] a542ad1bafc7df9fc16de8a6894b350a4df75572 < 3a63cee1a5e14a3e52c19142c61dd5fcb524f6dc [affected] a542ad1bafc7df9fc16de8a6894b350a4df75572 < fddc19631c51d9c17d43e9f822a7bc403af88d54 [affected] a542ad1bafc7df9fc16de8a6894b350a4df75572 < 2f7ef5bb4a2f3e481ef05fab946edb97c84f67cf [affected]
Linux	Linux	3.2 [affected] < 3.2 [unaffected] 4.19.313 ≤ 4.19.* [unaffected] 5.4.275 ≤ 5.4.* [unaffected] 5.10.216 ≤ 5.10.* [unaffected] 5.15.158 ≤ 5.15.* [unaffected] 6.1.90 ≤ 6.1.* [unaffected] 6.6.30 ≤ 6.6.* [unaffected] 6.8.9 ≤ 6.8.* [unaffected] 6.9 ≤ * [unaffected]
© 2022 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation.

CPE

cpe	start	end
Configuration 1
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*		< 4.19.313
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*	>= 4.20	< 5.4.275
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*	>= 5.5	< 5.10.216
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*	>= 5.11	< 5.15.158
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*	>= 5.16	< 6.1.90
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*	>= 6.2	< 6.6.30
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*	>= 6.7	< 6.8.9
cpe:2.3:o:linux:linux_kernel:6.9:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.9:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.9:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.9:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.9:rc5:*:*:*:*:*:*
Configuration 2
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

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REMEDIATION

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Patch

Url
https://git.kernel.org/stable/c/2f7ef5bb4a2f3e481ef05fab946edb97c84f67cf
https://git.kernel.org/stable/c/30189e54ba80e3209d34cfeea87b848f6ae025e6
https://git.kernel.org/stable/c/3a63cee1a5e14a3e52c19142c61dd5fcb524f6dc
https://git.kernel.org/stable/c/689efe22e9b5b7d9d523119a9a5c3c17107a0772
https://git.kernel.org/stable/c/73db209dcd4ae026021234d40cfcb2fb5b564b86
https://git.kernel.org/stable/c/8bdbcfaf3eac42f98e5486b3d7e130fa287811f6
https://git.kernel.org/stable/c/e58047553a4e859dafc8d1d901e1de77c9dd922d
https://git.kernel.org/stable/c/fddc19631c51d9c17d43e9f822a7bc403af88d54
https://git.kernel.org/stable/c/2f7ef5bb4a2f3e481ef05fab946edb97c84f67cf
https://git.kernel.org/stable/c/30189e54ba80e3209d34cfeea87b848f6ae025e6
https://git.kernel.org/stable/c/3a63cee1a5e14a3e52c19142c61dd5fcb524f6dc
https://git.kernel.org/stable/c/689efe22e9b5b7d9d523119a9a5c3c17107a0772
https://git.kernel.org/stable/c/73db209dcd4ae026021234d40cfcb2fb5b564b86
https://git.kernel.org/stable/c/8bdbcfaf3eac42f98e5486b3d7e130fa287811f6
https://git.kernel.org/stable/c/e58047553a4e859dafc8d1d901e1de77c9dd922d
https://git.kernel.org/stable/c/fddc19631c51d9c17d43e9f822a7bc403af88d54

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EXPLOITS

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Exploit-db.com

id	description	date
No known exploits

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POC Github

Url
No known exploits

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Other Nist (github, ...)

Url
No known exploits

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CAPEC

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Common Attack Pattern Enumerations and Classifications

id	description	severity
No entry

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