Linux: Out-of-bounds Read
CVE-2025-71112 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 46c7d9fe8dd869ea5de666aba8c1ec1061ca44a8, 42c91dfa772c57de141e5a55a187ac760c0fd7e1, 00e56a7706e10b3d00a258d81fcb85a7e96372d6 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 0.16% 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 46c7d9fe8dd869ea5de666aba8c1ec1061ca44a8 or 42c91dfa772c57de141e5a55a187ac760c0fd7e1 or 00e56a7706e10b3d00a258d81fcb85a7e96372d6 or b7b4f3bf118f51b67691a55b464f04452e5dc6fc, whichever matches your release line, or a later version.
- Update Linux Kernel to 5.10.248 or 5.15.198 or 6.1.160 or 6.6.120, whichever matches your release line, or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | Linux | fe4144d47eef8453459c53a34e9d5940a3e6c219 up to, but not including, 46c7d9fe8dd869ea5de666aba8c1ec1061ca44a8; fe4144d47eef8453459c53a34e9d5940a3e6c219 up to, but not including, 42c91dfa772c57de141e5a55a187ac760c0fd7e1; fe4144d47eef8453459c53a34e9d5940a3e6c219 up to, but not including, 00e56a7706e10b3d00a258d81fcb85a7e96372d6; fe4144d47eef8453459c53a34e9d5940a3e6c219 up to, but not including, b7b4f3bf118f51b67691a55b464f04452e5dc6fc; fe4144d47eef8453459c53a34e9d5940a3e6c219 up to, but not including, 95cca255a7a5ad782639ff0298c2a486707d1046; fe4144d47eef8453459c53a34e9d5940a3e6c219 up to, but not including, 91a51d01be5c9f82c12c2921ca5cceaa31b67128; fe4144d47eef8453459c53a34e9d5940a3e6c219 up to, but not including, 6ef935e65902bfed53980ad2754b06a284ea8ac1; 5.3 | 46c7d9fe8dd869ea5de666aba8c1ec1061ca44a8, 42c91dfa772c57de141e5a55a187ac760c0fd7e1, 00e56a7706e10b3d00a258d81fcb85a7e96372d6, b7b4f3bf118f51b67691a55b464f04452e5dc6fc, 95cca255a7a5ad782639ff0298c2a486707d1046, 91a51d01be5c9f82c12c2921ca5cceaa31b67128 |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) | V3.1.6 and later; V3.1.7 and later | Not stated |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) | V3.1.6 and later; V3.1.7 and later | Not stated |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) | V3.1.6 and later; V3.1.7 and later | Not stated |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) | V3.1.6 and later; V3.1.7 and later | Not stated |
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) | V3.1.6 and later; V3.1.7 and later | Not stated |
| Linux | Linux Kernel | 5.3.1 up to, but not including, 5.10.248; 5.11 up to, but not including, 5.15.198; 5.16 up to, but not including, 6.1.160; 6.2 up to, but not including, 6.6.120; 6.7 up to, but not including, 6.12.64; 6.13 up to, but not including, 6.18.3; 5.3; 6.19 | 5.10.248, 5.15.198, 6.1.160, 6.6.120, 6.12.64, 6.18.3 |
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 | 8.8 | High | CNA |
| CVSS 3.1 | 7.1 | High | NVD |
Official description
In the Linux kernel, the following vulnerability has been resolved: net: hns3: add VLAN id validation before using Currently, the VLAN id may be used without validation when receive a VLAN configuration mailbox from VF. The length of vlan_del_fail_bmap is BITS_TO_LONGS(VLAN_N_VID). It may cause out-of-bounds memory access once the VLAN id is bigger than or equal to VLAN_N_VID. Therefore, VLAN id needs to be checked to ensure it is within the range of VLAN_N_VID.
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.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Patches and release notes
- git.kernel.org/stable/c/00e56a7706e10b3d00a258d81fcb85a7e96372d6
- git.kernel.org/stable/c/42c91dfa772c57de141e5a55a187ac760c0fd7e1
- git.kernel.org/stable/c/46c7d9fe8dd869ea5de666aba8c1ec1061ca44a8
- git.kernel.org/stable/c/6ef935e65902bfed53980ad2754b06a284ea8ac1
- git.kernel.org/stable/c/91a51d01be5c9f82c12c2921ca5cceaa31b67128
- git.kernel.org/stable/c/95cca255a7a5ad782639ff0298c2a486707d1046
- git.kernel.org/stable/c/b7b4f3bf118f51b67691a55b464f04452e5dc6fc
Other references
Recent Out-of-bounds Read vulnerabilities
- 9.1 Critical severity
- 9.1 Critical severity
- 9.1 Critical severity
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
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