#VU93821 Out-of-bounds read in Linux kernel - CVE-2024-39482
Vulnerability identifier: #VU93821
Vulnerability risk: Low
CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID:
CWE-ID:
CWE-125
Exploitation vector: Local
Exploit availability: No
Vulnerable software:
Linux kernel
Operating systems & Components /
Operating system
Vendor: Linux Foundation
Description
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to an out-of-bounds read error within the bch_dirty_init_thread() and bch_sectors_dirty_init() functions in drivers/md/bcache/writeback.c, within the bch_root_usage() function in drivers/md/bcache/sysfs.c, within the bch_cache_set_alloc() function in drivers/md/bcache/super.c, within the btree_gc_mark_node(), btree_gc_rewrite_node(), btree_gc_recurse(), bch_btree_check_recurse(), bch_btree_check_thread(), bch_btree_check(), bch_btree_map_nodes_recurse() and bch_btree_map_keys_recurse() functions in drivers/md/bcache/btree.c, within the bch_dump_bucket(), __bch_check_keys(), bch_btree_insert_key(), bch_btree_iter_push(), bch_btree_sort_partial() and bch_btree_sort_into() functions in drivers/md/bcache/bset.c. A local user can perform a denial of service (DoS) attack.
Mitigation
Install update from vendor's website.
Vulnerable software versions
Linux kernel: All versions
External links
https://git.kernel.org/stable/c/934e1e4331859183a861f396d7dfaf33cb5afb02
https://git.kernel.org/stable/c/6479b9f41583b013041943c4602e1ad61cec8148
https://git.kernel.org/stable/c/0c31344e22dd8d6b1394c6e4c41d639015bdc671
https://git.kernel.org/stable/c/3a861560ccb35f2a4f0a4b8207fa7c2a35fc7f31
https://git.kernel.org/stable/c/2c3d7b03b658dc8bfa6112b194b67b92a87e081b
https://git.kernel.org/stable/c/5a1922adc5798b7ec894cd3f197afb6f9591b023
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
