Linux: Out-of-bounds Read
CVE-2024-50268 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 d76923164705821aa1b01b8d9d1741f20c654ab4, 8f47984b35f3be0cfc652c2ca358d5768ea3456b, 604314ecd682913925980dc955caea2d036eab5f 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 d76923164705821aa1b01b8d9d1741f20c654ab4 or 8f47984b35f3be0cfc652c2ca358d5768ea3456b or 604314ecd682913925980dc955caea2d036eab5f or 69e19774f15e12dda6c6c58001d059e30895009b, whichever matches your release line, or a later version.
- Update Linux Kernel to 5.10.230 or 5.15.172 or 6.1.117 or 6.6.61, whichever matches your release line, or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | Linux | 170a6726d0e266f2c8f306e3d61715c32f4ee41e up to, but not including, d76923164705821aa1b01b8d9d1741f20c654ab4; 170a6726d0e266f2c8f306e3d61715c32f4ee41e up to, but not including, 8f47984b35f3be0cfc652c2ca358d5768ea3456b; 170a6726d0e266f2c8f306e3d61715c32f4ee41e up to, but not including, 604314ecd682913925980dc955caea2d036eab5f; 170a6726d0e266f2c8f306e3d61715c32f4ee41e up to, but not including, 69e19774f15e12dda6c6c58001d059e30895009b; 170a6726d0e266f2c8f306e3d61715c32f4ee41e up to, but not including, 3a2ba841659a0f15102585120dea75d8d5209616; 170a6726d0e266f2c8f306e3d61715c32f4ee41e up to, but not including, 7dd08a0b4193087976db6b3ee7807de7e8316f96; 5.6 | d76923164705821aa1b01b8d9d1741f20c654ab4, 8f47984b35f3be0cfc652c2ca358d5768ea3456b, 604314ecd682913925980dc955caea2d036eab5f, 69e19774f15e12dda6c6c58001d059e30895009b, 3a2ba841659a0f15102585120dea75d8d5209616, 7dd08a0b4193087976db6b3ee7807de7e8316f96 |
| Linux | Linux Kernel | 5.6 up to, but not including, 5.10.230; 5.11 up to, but not including, 5.15.172; 5.16 up to, but not including, 6.1.117; 6.2 up to, but not including, 6.6.61; 6.7 up to, but not including, 6.11.8; 6.12 | 5.10.230, 5.15.172, 6.1.117, 6.6.61, 6.11.8 |
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 |
| CVSS 3.1 | 7.1 | High | CISA (ADP) |
Official description
In the Linux kernel, the following vulnerability has been resolved: usb: typec: fix potential out of bounds in ucsi_ccg_update_set_new_cam_cmd() The "*cmd" variable can be controlled by the user via debugfs. That means "new_cam" can be as high as 255 while the size of the uc->updated[] array is UCSI_MAX_ALTMODES (30). The call tree is: ucsi_cmd() // val comes from simple_attr_write_xsigned() -> ucsi_send_command() -> ucsi_send_command_common() -> ucsi_run_command() // calls ucsi->ops->sync_control() -> ucsi_ccg_sync_control()
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: partial).
- Record last changed materially (score, affected products, status or references).
References
Patches and release notes
- git.kernel.org/stable/c/3a2ba841659a0f15102585120dea75d8d5209616
- git.kernel.org/stable/c/604314ecd682913925980dc955caea2d036eab5f
- git.kernel.org/stable/c/69e19774f15e12dda6c6c58001d059e30895009b
- git.kernel.org/stable/c/7dd08a0b4193087976db6b3ee7807de7e8316f96
- git.kernel.org/stable/c/8f47984b35f3be0cfc652c2ca358d5768ea3456b
- git.kernel.org/stable/c/d76923164705821aa1b01b8d9d1741f20c654ab4
Other references
Recent Out-of-bounds Read vulnerabilities
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
- 7.8 High severity
- 7.8 High severity
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