Linux: Use of Uninitialized Resource
CVE-2024-46865 is a high-severity use of uninitialized resource 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 392f6a97fcbecc64f0c00058b2db5bb0e4b8cc3e, 16ff0895283058b0f96d4fe277aa25ee096f0ea8, 5d537b8d900514509622ce92330b70d2e581d409 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 0.55% 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 392f6a97fcbecc64f0c00058b2db5bb0e4b8cc3e or 16ff0895283058b0f96d4fe277aa25ee096f0ea8 or 5d537b8d900514509622ce92330b70d2e581d409 or 7ae890ee19479eeeb87724cca8430b5cb3660c74, whichever matches your release line, or a later version.
- Update SIMATIC S7-1500 TM MFP - GNU/Linux subsystem to V1.1.1 or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | Linux | 231c235d2f7a66f018f172e26ffd47c363f244ef up to, but not including, 392f6a97fcbecc64f0c00058b2db5bb0e4b8cc3e; 4494bccb52ffda22ce5a1163a776d970e6229e08 up to, but not including, 16ff0895283058b0f96d4fe277aa25ee096f0ea8; d7567f098f54cb53ee3cee1c82e3d0ed9698b6b3 up to, but not including, 5d537b8d900514509622ce92330b70d2e581d409; 1df42be305fe478ded1ee0c1d775f4ece713483b up to, but not including, 7ae890ee19479eeeb87724cca8430b5cb3660c74; c46cd6aaca81040deaea3500ba75126963294bd9 up to, but not including, aca06c617c83295f0caa486ad608fbef7bdc11e8; 7e4196935069947d8b70b09c1660b67b067e75cb up to, but not including, 4c8002277167125078e6b9b90137bdf443ebaa08; 5.10.226 up to, but not including, 5.10.227; 5.15.167 up to, but not including, 5.15.168; and 3 more ranges | 392f6a97fcbecc64f0c00058b2db5bb0e4b8cc3e, 16ff0895283058b0f96d4fe277aa25ee096f0ea8, 5d537b8d900514509622ce92330b70d2e581d409, 7ae890ee19479eeeb87724cca8430b5cb3660c74, aca06c617c83295f0caa486ad608fbef7bdc11e8, 4c8002277167125078e6b9b90137bdf443ebaa08 |
| Siemens | SIMATIC S7-1500 TM MFP - GNU/Linux subsystem | before V1.1.1 | V1.1.1 |
| Linux | Linux Kernel | 5.10.226; 5.15.167; 6.1.110; 6.6.51; 6.10.10 | 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 | 9.8 | Critical | CNA |
| CVSS 3.1 | 7.1 | High | NVD |
Official description
In the Linux kernel, the following vulnerability has been resolved: fou: fix initialization of grc The grc must be initialize first. There can be a condition where if fou is NULL, goto out will be executed and grc would be used uninitialized.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Use of Uninitialized Resource
The product uses or accesses a resource that has not been initialized.
How developers prevent this class of flaw
- Explicitly initialize the resource before use. If this is performed through an API function or standard procedure, follow all required steps.
- Pay close attention to complex conditionals that affect initialization, since some branches might not perform the initialization.
- Avoid race conditions (CWE-362) during initialization routines.
More Use of Uninitialized Resource vulnerabilities (CWE-908)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Patches and release notes
Other references
- git.kernel.org/stable/c/16ff0895283058b0f96d4fe277aa25ee096f0ea8
- git.kernel.org/stable/c/392f6a97fcbecc64f0c00058b2db5bb0e4b8cc3e
- lists.debian.org/debian-lts-announce/2025/01/msg00001.html
- lists.debian.org/debian-lts-announce/2025/03/msg00002.html
- cert-portal.siemens.com/productcert/html/ssa-265688.html
Recent Use of Uninitialized Resource vulnerabilities
- 9.8 Critical severity
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
- 8.2 High severity
- 8.8 High severity
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