Linux: Use After Free
CVE-2024-41149 is a high-severity use after free 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 ee18012c80155f6809522804099621070c69ec72, b5792c162dcf6197bf3d2de2be6c8169435b73d0, 85672ca9ceeaa1dcf2777a7048af5f4aee3fd02b 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 0.22% 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 ee18012c80155f6809522804099621070c69ec72 or b5792c162dcf6197bf3d2de2be6c8169435b73d0 or 85672ca9ceeaa1dcf2777a7048af5f4aee3fd02b or 6.12.7, whichever matches your release line, or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | Linux | 58bf93580fec30d84a46be41171c5fad98b5cc70 up to, but not including, ee18012c80155f6809522804099621070c69ec72; c1291ea131d186296dc8d328a36c3caf38e8e159 up to, but not including, b5792c162dcf6197bf3d2de2be6c8169435b73d0; 22465bbac53c821319089016f268a2437de9b00a up to, but not including, 85672ca9ceeaa1dcf2777a7048af5f4aee3fd02b; 6.12.6 up to, but not including, 6.12.7 | ee18012c80155f6809522804099621070c69ec72, b5792c162dcf6197bf3d2de2be6c8169435b73d0, 85672ca9ceeaa1dcf2777a7048af5f4aee3fd02b, 6.12.7 |
| Linux | Linux Kernel | 6.12.6; 6.13 | 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
- 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 CISA (ADP).
Official description
In the Linux kernel, the following vulnerability has been resolved: block: avoid to reuse `hctx` not removed from cpuhp callback list If the 'hctx' isn't removed from cpuhp callback list, we can't reuse it, otherwise use-after-free may be triggered.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Use After Free
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory belongs to the code that operates on the new pointer.
How developers prevent this class of flaw
- Choose a language that provides automatic memory management.
- When freeing pointers, be sure to set them to NULL once they are freed. However, the utilization of multiple or complex data structures may lower the usefulness of this strategy.
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
Recent Use After Free vulnerabilities
- 7.8 High severity
- 7.8 High severity
- 7.8 High severity
- 7.8 High severity
- 7.8 High severity
- 9.8 Critical severity
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