CVE-2024-40909
Linux kernel Use-After-Free Vulnerability in BPF
Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix a potential use-after-free in bpf_link_free() After commit 1a80dbcb2dba, bpf_link can be freed by link->ops->dealloc_deferred, but the code still tests and uses link->ops->dealloc afterward, which leads to a use-after-free as reported by syzbot. Actually, one of them should be sufficient, so just call one of them instead of both. Also add a WARN_ON() in case of any problematic implementation.
INFO
Published Date :
July 12, 2024, 1:15 p.m.
Last Modified :
Aug. 29, 2024, 1:55 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
5.9
Exploitability Score :
1.8
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2024-40909.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2024-40909 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2024-40909 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Aug. 29, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://git.kernel.org/stable/c/2884dc7d08d98a89d8d65121524bb7533183a63a No Types Assigned https://git.kernel.org/stable/c/2884dc7d08d98a89d8d65121524bb7533183a63a Patch Changed Reference Type https://git.kernel.org/stable/c/91cff53136daeff50816b0baeafd38a6976f6209 No Types Assigned https://git.kernel.org/stable/c/91cff53136daeff50816b0baeafd38a6976f6209 Patch Changed Reference Type https://git.kernel.org/stable/c/fa97b8fed9896f1e89cb657513e483a152d4c382 No Types Assigned https://git.kernel.org/stable/c/fa97b8fed9896f1e89cb657513e483a152d4c382 Patch Added CWE NIST CWE-416 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.6.26 up to (excluding) 6.6.35 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.9 up to (excluding) 6.9.6 *cpe:2.3:o:linux:linux_kernel:6.10:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.10:rc2:*:*:*:*:*:* -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 12, 2024
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: bpf: Fix a potential use-after-free in bpf_link_free() After commit 1a80dbcb2dba, bpf_link can be freed by link->ops->dealloc_deferred, but the code still tests and uses link->ops->dealloc afterward, which leads to a use-after-free as reported by syzbot. Actually, one of them should be sufficient, so just call one of them instead of both. Also add a WARN_ON() in case of any problematic implementation. Added Reference kernel.org https://git.kernel.org/stable/c/91cff53136daeff50816b0baeafd38a6976f6209 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/fa97b8fed9896f1e89cb657513e483a152d4c382 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/2884dc7d08d98a89d8d65121524bb7533183a63a [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2024-40909 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2024-40909
weaknesses.