CVE-2024-26831: net/handshake: Fix handshake_req_destroy_test1
First published: Wed Apr 17 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: net/handshake: Fix handshake_req_destroy_test1 Recently, handshake_req_destroy_test1 started failing: Expected handshake_req_destroy_test == req, but handshake_req_destroy_test == 0000000000000000 req == 0000000060f99b40 not ok 11 req_destroy works This is because "sock_release(sock)" was replaced with "fput(filp)" to address a memory leak. Note that sock_release() is synchronous but fput() usually delays the final close and clean-up. The delay is not consequential in the other cases that were changed but handshake_req_destroy_test1 is testing that handshake_req_cancel() followed by closing the file actually does call the ->hp_destroy method. Thus the PTR_EQ test at the end has to be sure that the final close is complete before it checks the pointer. We cannot use a completion here because if ->hp_destroy is never called (ie, there is an API bug) then the test will hang. Reported by: Guenter Roeck <linux@roeck-us.net>
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=6.6<6.6.18 | |
| Linux Kernel | >=6.7<6.7.6 | |
| Linux Kernel | =6.5.6 | |
| Linux Kernel | =6.8-rc1 | |
| Linux Kernel | =6.8-rc2 | |
| Linux Kernel | =6.8-rc3 | |
| Linux Kernel | =6.8-rc4 | |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.129-1 6.1.128-1 6.12.21-1 6.12.22-1 |
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Reference Links
- https://git.kernel.org/stable/c/4e1d71cabb19ec2586827adfc60d68689c68c194
- https://git.kernel.org/stable/c/7f97805b8df6e33850e225e6bd3ebd9e246920af
- https://git.kernel.org/stable/c/d74226e03df1bf19848f18344401f254345af912
- https://launchpad.net/bugs/cve/CVE-2024-26831
- https://git.kernel.org/linus/4e1d71cabb19ec2586827adfc60d68689c68c194
- https://security-tracker.debian.org/tracker/CVE-2024-26831
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-26831
- https://nvd.nist.gov/vuln/detail/CVE-2024-26831
- https://ubuntu.com/security/CVE-2024-26831
Frequently Asked Questions
What is the severity of CVE-2024-26831?
CVE-2024-26831 has a moderate severity level due to its impact on the Linux kernel's handshake processes.
How do I fix CVE-2024-26831?
To fix CVE-2024-26831, update the Linux kernel to one of the fixed versions: 5.10.223-1, 5.10.226-1, 6.1.119-1, 6.1.123-1, 6.12.10-1, or 6.12.11-1.
Which versions of Linux are affected by CVE-2024-26831?
CVE-2024-26831 affects specific versions of the Linux kernel before 5.10.223-1, 5.10.226-1, 6.1.119-1, 6.1.123-1, 6.12.10-1, and 6.12.11-1.
Is CVE-2024-26831 exploitable in a production environment?
Yes, CVE-2024-26831 can potentially be exploited in a production environment if the affected kernel versions are in use.
What components are impacted by CVE-2024-26831?
CVE-2024-26831 primarily impacts the handshake functionalities within the Linux kernel.
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