Linux: Out-of-bounds Read
CVE-2025-38714 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 032f7ed6717a4cd3714f9801be39fdfc7f1c7644, ffee8a7bed0fbfe29da239a922b59c5db897c613, 5ab59229bef6063edf3a6fc2e3e3fd7cd2181b29 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 0.18% 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 032f7ed6717a4cd3714f9801be39fdfc7f1c7644 or ffee8a7bed0fbfe29da239a922b59c5db897c613 or 5ab59229bef6063edf3a6fc2e3e3fd7cd2181b29 or a2abd574d2fe22b8464cf6df5abb6f24d809eac0, whichever matches your release line, or a later version.
- Update SIMATIC CN 4100 to V5.0 or a later version.
- Update Linux Kernel to 5.4.297 or 5.10.241 or 5.15.190 or 6.1.149, whichever matches your release line, or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 up to, but not including, 032f7ed6717a4cd3714f9801be39fdfc7f1c7644; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 up to, but not including, ffee8a7bed0fbfe29da239a922b59c5db897c613; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 up to, but not including, 5ab59229bef6063edf3a6fc2e3e3fd7cd2181b29; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 up to, but not including, a2abd574d2fe22b8464cf6df5abb6f24d809eac0; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 up to, but not including, 8583d067ae22b7f32ce5277ca5543ac8bf86a3e5; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 up to, but not including, 475d770c19929082aab43337e6c077d0e2043df3; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 up to, but not including, 291b7f2538920aa229500dbdd6c5f0927a51bc8b; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 up to, but not including, 7fa4cef8ea13b37811287ef60674c5fd1dd02ee6; and 2 more ranges | 032f7ed6717a4cd3714f9801be39fdfc7f1c7644, ffee8a7bed0fbfe29da239a922b59c5db897c613, 5ab59229bef6063edf3a6fc2e3e3fd7cd2181b29, a2abd574d2fe22b8464cf6df5abb6f24d809eac0, 8583d067ae22b7f32ce5277ca5543ac8bf86a3e5, 475d770c19929082aab43337e6c077d0e2043df3 |
| Siemens | SIMATIC CN 4100 | before V5.0 | V5.0 |
| Linux | Linux Kernel | 2.6.13 up to, but not including, 5.4.297; 5.5 up to, but not including, 5.10.241; 5.11 up to, but not including, 5.15.190; 5.16 up to, but not including, 6.1.149; 6.2 up to, but not including, 6.6.103; 6.7 up to, but not including, 6.12.43; 6.13 up to, but not including, 6.15.11; 6.16 up to, but not including, 6.16.2; and 1 more ranges | 5.4.297, 5.10.241, 5.15.190, 6.1.149, 6.6.103, 6.12.43 |
| Debian | Debian Linux | 11.0 | Not stated |
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: hfsplus: fix slab-out-of-bounds in hfsplus_bnode_read() The hfsplus_bnode_read() method can trigger the issue: [ 174.852007][ T9784] ================================================================== [ 174.852709][ T9784] BUG: KASAN: slab-out-of-bounds in hfsplus_bnode_read+0x2f4/0x360 [ 174.853412][ T9784] Read of size 8 at addr ffff88810b5fc6c0 by task repro/9784 [ 174.854059][ T9784] [ 174.854272][ T9784] CPU: 1 UID: 0 PID: 9784 Comm: repro Not tainted 6.16.0-rc3 #7 PREEMPT(full) [ 174.854281][ T9784] Hardware name: QEMU Ubuntu 24.04 PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 174.854286][ T9784] Call Trace: [ 174.854289][ T9784] <TASK> [ 174.854292][ T9784] dump_stack_lvl+0x10e/0x1f0 [ 174.854305][ T9784] print_report+0xd0/0x660 [ 174.854315][ T9784] ? __virt_addr_valid+0x81/0x610 [ 174.854323][ T9784] ? __phys_addr+0xe8/0x180 [ 174.854330][ T9784] ? hfsplus_bnode_read+0x2f4/0x360 [ 174.854337][ T9784] kasan_report+0xc6/0x100 [ 174.854346][ T9784] ? hfsplus_bnode_read+0x2f4/0x360 [ 174.854354][ T9784] hfsplus_bnode_read+0x2f4/0x360 [ 174.854362][ T9784] hfsplus_bnode_dump+0x2ec/0x380 [ 174.854370][ T9784] ? __pfx_hfsplus_bnode_dump+0x10/0x10 [ 174.854377][ T9784] ? hfsplus_bnode_write_u16+0x83/0xb0 [ 174.854385][ T9784] ? srcu_gp_start+0xd0/0x310 [ 174.854393][ T9784] ? __mark_inode_dirty+0x29e/0xe40 [ 174.854402][ T9784] hfsplus_brec_remove+0x3d2/0x4e0 [ 174.854411][ T9784] __hfsplus_delete_attr+0x290/0x3a0 [ 174.854419][ T9784] ? __pfx_hfs_find_1st_rec_by_cnid+0x10/0x10 [ 174.854427][ T9784] ? __pfx___hfsplus_delete_attr+0x10/0x10 [ 174.854436][ T9784] ? __asan_memset+0x23/0x50 [ 174.854450][ T9784] hfsplus_delete_all_attrs+0x262/0x320 [ 174.854459][ T9784] ? __pfx_hfsplus_delete_all_attrs+0x10/0x10 [ 174.854469][ T9784] ? rcu_is_watching+0x12/0xc0 [ 174.854476][ T9784] ? __mark_inode_dirty+0x29e/0xe40 [ 174.854483][ T9784] hfsplus_delete_cat+0x845/0xde0 [ 174.854493][ T9784] ? __pfx_hfsplus_delete_cat+0x10/0x10 [ 174.854507][ T9784] hfsplus_unlink+0x1ca/0x7c0 [ 174.854516][ T9784] ? __pfx_hfsplus_unlink+0x10/0x10 [ 174.854525][ T9784] ? down_write+0x148/0x200 [ 174.854532][ T9784] ? __pfx_down_write+0x10/0x10 [ 174.854540][ T9784] vfs_unlink+0x2fe/0x9b0 [ 174.854549][ T9784] do_unlinkat+0x490/0x670 [ 174.854557][ T9784] ? __pfx_do_unlinkat+0x10/0x10 [ 174.854565][ T9784] ? __might_fault+0xbc/0x130 [ 174.854576][ T9784] ? getname_flags.part.0+0x1c5/0x550 [ 174.854584][ T9784] __x64_sys_unlink+0xc5/0x110 [ 174.854592][ T9784] do_syscall_64+0xc9/0x480 [ 174.854600][ T9784] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 174.854608][ T9784] RIP: 0033:0x7f6fdf4c3167 [ 174.854614][ T9784] Code: f0 ff ff 73 01 c3 48 8b 0d 26 0d 0e 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 08 [ 174.854622][ T9784] RSP: 002b:00007ffcb948bca8 EFLAGS: 00000206 ORIG_RAX: 0000000000000057 [ 174.854630][ T9784] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f6fdf4c3167 [ 174.854636][ T9784] RDX: 00007ffcb948bcc0 RSI: 00007ffcb948bcc0 RDI: 00007ffcb948bd50 [ 174.854641][ T9784] RBP: 00007ffcb948cd90 R08: 0000000000000001 R09: 00007ffcb948bb40 [ 174.854645][ T9784] R10: 00007f6fdf564fc0 R11: 0000000000000206 R12: 0000561e1bc9c2d0 [ 174.854650][ T9784] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 174.854658][ T9784] </TASK> [ 174.854661][ T9784] [ 174.879281][ T9784] Allocated by task 9784: [ 174.879664][ T9784] kasan_save_stack+0x20/0x40 [ 174.880082][ T9784] kasan_save_track+0x14/0x30 [ 174.880500][ T9784] __kasan_kmalloc+0xaa/0xb0 [ 174.880908][ T9784] __kmalloc_noprof+0x205/0x550 [ 174.881337][ T9784] __hfs_bnode_create+0x107/0x890 [ 174.881779][ T9784] hfsplus_bnode_find+0x2d0/0xd10 [ 174.882222][ T9784] hfsplus_brec_find+0x2b0/0x520 [ 174.882659][ T9784] hfsplus_delete_all_attrs+0x23b/0x3 ---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
- git.kernel.org/stable/c/032f7ed6717a4cd3714f9801be39fdfc7f1c7644
- git.kernel.org/stable/c/291b7f2538920aa229500dbdd6c5f0927a51bc8b
- git.kernel.org/stable/c/475d770c19929082aab43337e6c077d0e2043df3
- git.kernel.org/stable/c/5ab59229bef6063edf3a6fc2e3e3fd7cd2181b29
- git.kernel.org/stable/c/7fa4cef8ea13b37811287ef60674c5fd1dd02ee6
- git.kernel.org/stable/c/8583d067ae22b7f32ce5277ca5543ac8bf86a3e5
- git.kernel.org/stable/c/a2abd574d2fe22b8464cf6df5abb6f24d809eac0
- git.kernel.org/stable/c/c80aa2aaaa5e69d5219c6af8ef7e754114bd08d2
- git.kernel.org/stable/c/ffee8a7bed0fbfe29da239a922b59c5db897c613
Third-party and government advisories
- lists.debian.org/debian-lts-announce/2025/10/msg00007.htmlMailing List, Third Party Advisory
- lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlMailing List, Third Party Advisory
Other references
Recent Out-of-bounds Read vulnerabilities
- 8.1 High severity
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
Spotted an error? Tell us.