Linux: Out-of-bounds Read
CVE-2023-53486 is a high-severity out-of-bounds read vulnerability in Linux, with a CVSS 3.1 base score of 7.1 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, without any action from a user. The record lists versions 1fd5b80c9339503f3eaa4db3051b37ac506beeab, 277439e7cabd9d4c6334b39a4b99d49b4c97265b, f28d9e02c2c242e8f9af9e13ba263fcc0211be49 as the first without the flaw, so updating Linux to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.17% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Linux to 1fd5b80c9339503f3eaa4db3051b37ac506beeab or 277439e7cabd9d4c6334b39a4b99d49b4c97265b or f28d9e02c2c242e8f9af9e13ba263fcc0211be49 or 4f082a7531223a438c757bb20e304f4c941c67a8, whichever matches your release line, or a later version.
- Update Linux Kernel to 5.15.113 or 6.1.80 or 6.3.4, whichever matches your release line, or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | Linux | 4534a70b7056fd4b9a1c6db5a4ce3c98546b291e up to, but not including, 1fd5b80c9339503f3eaa4db3051b37ac506beeab; 4534a70b7056fd4b9a1c6db5a4ce3c98546b291e up to, but not including, 277439e7cabd9d4c6334b39a4b99d49b4c97265b; 4534a70b7056fd4b9a1c6db5a4ce3c98546b291e up to, but not including, f28d9e02c2c242e8f9af9e13ba263fcc0211be49; 4534a70b7056fd4b9a1c6db5a4ce3c98546b291e up to, but not including, 4f082a7531223a438c757bb20e304f4c941c67a8; 5.15 | 1fd5b80c9339503f3eaa4db3051b37ac506beeab, 277439e7cabd9d4c6334b39a4b99d49b4c97265b, f28d9e02c2c242e8f9af9e13ba263fcc0211be49, 4f082a7531223a438c757bb20e304f4c941c67a8 |
| Linux | Linux Kernel | 5.15 up to, but not including, 5.15.113; 5.16 up to, but not including, 6.1.80; 6.2 up to, but not including, 6.3.4 | 5.15.113, 6.1.80, 6.3.4 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- LocalThe attacker needs local access or must trick a user into running something.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- NoneNothing can be modified.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.8 | High | CNA |
| CVSS 3.1 | 7.1 | High | NVD |
Official description
In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: Enhance the attribute size check This combines the overflow and boundary check so that all attribute size will be properly examined while enumerating them. [ 169.181521] BUG: KASAN: slab-out-of-bounds in run_unpack+0x2e3/0x570 [ 169.183161] Read of size 1 at addr ffff8880094b6240 by task mount/247 [ 169.184046] [ 169.184925] CPU: 0 PID: 247 Comm: mount Not tainted 6.0.0-rc7+ #3 [ 169.185908] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 [ 169.187066] Call Trace: [ 169.187492] <TASK> [ 169.188049] dump_stack_lvl+0x49/0x63 [ 169.188495] print_report.cold+0xf5/0x689 [ 169.188964] ? run_unpack+0x2e3/0x570 [ 169.189331] kasan_report+0xa7/0x130 [ 169.189714] ? run_unpack+0x2e3/0x570 [ 169.190079] __asan_load1+0x51/0x60 [ 169.190634] run_unpack+0x2e3/0x570 [ 169.191290] ? run_pack+0x840/0x840 [ 169.191569] ? run_lookup_entry+0xb3/0x1f0 [ 169.192443] ? mi_enum_attr+0x20a/0x230 [ 169.192886] run_unpack_ex+0xad/0x3e0 [ 169.193276] ? run_unpack+0x570/0x570 [ 169.193557] ? ni_load_mi+0x80/0x80 [ 169.193889] ? debug_smp_processor_id+0x17/0x20 [ 169.194236] ? mi_init+0x4a/0x70 [ 169.194496] attr_load_runs_vcn+0x166/0x1c0 [ 169.194851] ? attr_data_write_resident+0x250/0x250 [ 169.195188] mi_read+0x133/0x2c0 [ 169.195481] ntfs_iget5+0x277/0x1780 [ 169.196017] ? call_rcu+0x1c7/0x330 [ 169.196392] ? ntfs_get_block_bmap+0x70/0x70 [ 169.196708] ? evict+0x223/0x280 [ 169.197014] ? __kmalloc+0x33/0x540 [ 169.197305] ? wnd_init+0x15b/0x1b0 [ 169.197599] ntfs_fill_super+0x1026/0x1ba0 [ 169.197994] ? put_ntfs+0x1d0/0x1d0 [ 169.198299] ? vsprintf+0x20/0x20 [ 169.198583] ? mutex_unlock+0x81/0xd0 [ 169.198930] ? set_blocksize+0x95/0x150 [ 169.199269] get_tree_bdev+0x232/0x370 [ 169.199750] ? put_ntfs+0x1d0/0x1d0 [ 169.200094] ntfs_fs_get_tree+0x15/0x20 [ 169.200431] vfs_get_tree+0x4c/0x130 [ 169.200714] path_mount+0x654/0xfe0 [ 169.201067] ? putname+0x80/0xa0 [ 169.201358] ? finish_automount+0x2e0/0x2e0 [ 169.201965] ? putname+0x80/0xa0 [ 169.202445] ? kmem_cache_free+0x1c4/0x440 [ 169.203075] ? putname+0x80/0xa0 [ 169.203414] do_mount+0xd6/0xf0 [ 169.203719] ? path_mount+0xfe0/0xfe0 [ 169.203977] ? __kasan_check_write+0x14/0x20 [ 169.204382] __x64_sys_mount+0xca/0x110 [ 169.204711] do_syscall_64+0x3b/0x90 [ 169.205059] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 169.205571] RIP: 0033:0x7f67a80e948a [ 169.206327] Code: 48 8b 0d 11 fa 2a 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 a5 00 00 008 [ 169.208296] RSP: 002b:00007ffddf020f58 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 [ 169.209253] RAX: ffffffffffffffda RBX: 000055e2547a6060 RCX: 00007f67a80e948a [ 169.209777] RDX: 000055e2547a6260 RSI: 000055e2547a62e0 RDI: 000055e2547aeaf0 [ 169.210342] RBP: 0000000000000000 R08: 000055e2547a6280 R09: 0000000000000020 [ 169.210843] R10: 00000000c0ed0000 R11: 0000000000000202 R12: 000055e2547aeaf0 [ 169.211307] R13: 000055e2547a6260 R14: 0000000000000000 R15: 00000000ffffffff [ 169.211913] </TASK> [ 169.212304] [ 169.212680] Allocated by task 0: [ 169.212963] (stack is not available) [ 169.213200] [ 169.213472] The buggy address belongs to the object at ffff8880094b5e00 [ 169.213472] which belongs to the cache UDP of size 1152 [ 169.214095] The buggy address is located 1088 bytes inside of [ 169.214095] 1152-byte region [ffff8880094b5e00, ffff8880094b6280) [ 169.214639] [ 169.215004] The buggy address belongs to the physical page: [ 169.215766] page:000000002e324c8c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x94b4 [ 169.218412] head:000000002e324c8c order:2 compound_mapcount:0 compound_pincount:0 [ 169.219078] flags: 0xfffffc0010200(slab|head|node=0|zone=1|lastcpupid=0x1fffff) [ 169.220272] raw: 000fffffc0010200 ---truncated---
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Out-of-bounds Read
The product reads data past the end, or before the beginning, of the intended buffer.
How developers prevent this class of flaw
- Use a language that provides appropriate memory abstractions.
Timeline
- CVE record published.
- Record last changed materially (score, affected products, status or references).
References
Patches and release notes
Recent Out-of-bounds Read vulnerabilities
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
- 7.8 High severity
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