Linux: Access of Uninitialized Pointer
CVE-2024-46844 is a high-severity access of uninitialized pointer vulnerability in Linux, with a CVSS 3.1 base score of 7.8 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 3bedb7ce080690d0d6172db790790c1219bcbdd5, 96301fdc2d533a196197c055af875fe33d47ef84, c8944d449fda9f58c03bd99649b2df09948fc874 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 0.26% 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 3bedb7ce080690d0d6172db790790c1219bcbdd5 or 96301fdc2d533a196197c055af875fe33d47ef84 or c8944d449fda9f58c03bd99649b2df09948fc874 or 43f782c27907f306c664b6614fd6f264ac32cce6, whichever matches your release line, or a later version.
- Update Linux Kernel to 4.19.322 or 5.4.284 or 5.10.226 or 5.15.167, whichever matches your release line, or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | Linux | 31efcebb7d7196adcee73027f513d7c0bf572b47 up to, but not including, 3bedb7ce080690d0d6172db790790c1219bcbdd5; 31efcebb7d7196adcee73027f513d7c0bf572b47 up to, but not including, 96301fdc2d533a196197c055af875fe33d47ef84; 31efcebb7d7196adcee73027f513d7c0bf572b47 up to, but not including, c8944d449fda9f58c03bd99649b2df09948fc874; 31efcebb7d7196adcee73027f513d7c0bf572b47 up to, but not including, 43f782c27907f306c664b6614fd6f264ac32cce6; 31efcebb7d7196adcee73027f513d7c0bf572b47 up to, but not including, 289979d64573f43df1d0e6bc6435de63a0d69cdf; 31efcebb7d7196adcee73027f513d7c0bf572b47 up to, but not including, ec5b47a370177d79ae7773858042c107e21f8ecc; 31efcebb7d7196adcee73027f513d7c0bf572b47 up to, but not including, fc843d3837ebcb1c16d3768ef3eb55e25d5331f2; 31efcebb7d7196adcee73027f513d7c0bf572b47 up to, but not including, 824ac4a5edd3f7494ab1996826c4f47f8ef0f63d; and 1 more ranges | 3bedb7ce080690d0d6172db790790c1219bcbdd5, 96301fdc2d533a196197c055af875fe33d47ef84, c8944d449fda9f58c03bd99649b2df09948fc874, 43f782c27907f306c664b6614fd6f264ac32cce6, 289979d64573f43df1d0e6bc6435de63a0d69cdf, ec5b47a370177d79ae7773858042c107e21f8ecc |
| Linux | Linux Kernel | before 4.19.322; 4.20 up to, but not including, 5.4.284; 5.5 up to, but not including, 5.10.226; 5.11 up to, but not including, 5.15.167; 5.16 up to, but not including, 6.1.110; 6.2 up to, but not including, 6.6.51; 6.7 up to, but not including, 6.10.10 | 4.19.322, 5.4.284, 5.10.226, 5.15.167, 6.1.110, 6.6.51 |
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
- HighData or code can be modified at will.
- 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:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.1 | High | CNA |
| CVSS 3.1 | 7.8 | High | NVD |
Official description
In the Linux kernel, the following vulnerability has been resolved: um: line: always fill *error_out in setup_one_line() The pointer isn't initialized by callers, but I have encountered cases where it's still printed; initialize it in all possible cases in setup_one_line().
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Access of Uninitialized Pointer
The product accesses or uses a pointer that has not been initialized.
More Access of Uninitialized Pointer vulnerabilities (CWE-824)
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
- git.kernel.org/stable/c/289979d64573f43df1d0e6bc6435de63a0d69cdf
- git.kernel.org/stable/c/3bedb7ce080690d0d6172db790790c1219bcbdd5
- git.kernel.org/stable/c/43f782c27907f306c664b6614fd6f264ac32cce6
- git.kernel.org/stable/c/824ac4a5edd3f7494ab1996826c4f47f8ef0f63d
- git.kernel.org/stable/c/96301fdc2d533a196197c055af875fe33d47ef84
- git.kernel.org/stable/c/c8944d449fda9f58c03bd99649b2df09948fc874
- git.kernel.org/stable/c/ec5b47a370177d79ae7773858042c107e21f8ecc
- git.kernel.org/stable/c/fc843d3837ebcb1c16d3768ef3eb55e25d5331f2
Other references
Recent Access of Uninitialized Pointer vulnerabilities
- 7.5 High severity
- 7.8 High severity
- 7.8 High severity
- 7.8 High severity
- 7.8 High severity
- 7.8 High severity
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