Linux: Use After Free
CVE-2024-57887 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 acec80d9f126cd3fa764bbe3d96bc0cb5cd2b087, d208571943ffddc438a7ce533d5d0b9219806242, 1f49aaf55652580ae63ab83d67211fe6a55d83dc 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 0.21% 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 acec80d9f126cd3fa764bbe3d96bc0cb5cd2b087 or d208571943ffddc438a7ce533d5d0b9219806242 or 1f49aaf55652580ae63ab83d67211fe6a55d83dc or ca9d077350fa21897de8bf64cba23b198740aab5, whichever matches your release line, or a later version.
- Update Linux Kernel to 6.1.125 or 6.6.70 or 6.12.9, whichever matches your release line, or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | Linux | 1e4d58cd7f888522d16f221d628356befbb08468 up to, but not including, acec80d9f126cd3fa764bbe3d96bc0cb5cd2b087; 1e4d58cd7f888522d16f221d628356befbb08468 up to, but not including, d208571943ffddc438a7ce533d5d0b9219806242; 1e4d58cd7f888522d16f221d628356befbb08468 up to, but not including, 1f49aaf55652580ae63ab83d67211fe6a55d83dc; 1e4d58cd7f888522d16f221d628356befbb08468 up to, but not including, ca9d077350fa21897de8bf64cba23b198740aab5; 1e4d58cd7f888522d16f221d628356befbb08468 up to, but not including, 81adbd3ff21c1182e06aa02c6be0bfd9ea02d8e8; 4.8 | acec80d9f126cd3fa764bbe3d96bc0cb5cd2b087, d208571943ffddc438a7ce533d5d0b9219806242, 1f49aaf55652580ae63ab83d67211fe6a55d83dc, ca9d077350fa21897de8bf64cba23b198740aab5, 81adbd3ff21c1182e06aa02c6be0bfd9ea02d8e8 |
| Linux | Linux Kernel | 4.8 up to, but not including, 6.1.125; 6.2 up to, but not including, 6.6.70; 6.7 up to, but not including, 6.12.9; 6.13 | 6.1.125, 6.6.70, 6.12.9 |
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 | 7.8 | High | NVD |
| CVSS 3.1 | 7.8 | High | CISA (ADP) |
Official description
In the Linux kernel, the following vulnerability has been resolved: drm: adv7511: Fix use-after-free in adv7533_attach_dsi() The host_node pointer was assigned and freed in adv7533_parse_dt(), and later, adv7533_attach_dsi() uses the same. Fix this use-after-free issue by dropping of_node_put() in adv7533_parse_dt() and calling of_node_put() in error path of probe() and also in the remove().
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
Other references
Recent Use After Free vulnerabilities
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- 7.8 High severity
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- 7.8 High severity
- 7.8 High severity
- 7.8 High severity
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