CVE-2024-36896
CriticalIn the Linux kernel, the following vulnerability has been resolved: USB: core: Fix access violation during port device removal Testing with KASAN and syzkaller revealed a bug in port.c:disable_store(): usb_hub_to_struct_hub() can return NULL if the hub that the port belongs to is concurrently removed, but the function does not check for this possibility before dereferencing the returned value. It turns out that the first dereference is unnecessary, since hub->intfdev is the parent of the port device, so it can be changed easily. Adding a check for hub == NULL prevents further problems. The same bug exists in the disable_show() routine, and it can be fixed the same way.
CVSS 3.1 score
9.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Weakness type
CWE-476CVE-2024-36896 is a NULL Pointer Dereference vulnerability
What is NULL Pointer Dereference?
The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. Learn more on MITRE CWE
References
The following references provide additional information about CVE-2024-36896 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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PatchKernel patch commithttps://git.kernel.org/stable/c/5f1d68ef5ddac27c6b997adccd1c339cef1e6848
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PatchKernel patch commithttps://git.kernel.org/stable/c/6119ef6517ce501fc548154691abdaf1f954a277
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PatchKernel patch commithttps://git.kernel.org/stable/c/63533549ff53d24daf47c443dbd43c308afc3434
Frequently asked questions
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What is CVE-2024-36896?
CVE-2024-36896 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.1 out of 10 , classified as a NULL Pointer Dereference flaw (CWE-476) . CVE-2024-36896 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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What is the CVSS score for CVE-2024-36896?
CVE-2024-36896 has a CVSS score of 9.1 out of 10, rated Critical severity (CVSS 3.1). The vector string is
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H. -
Is there a patch available for CVE-2024-36896?
No patch is currently available for CVE-2024-36896. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
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Is CVE-2024-36896 actively exploited?
No — CVE-2024-36896 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
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What is NULL Pointer Dereference (CWE-476)?
The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. View CWE-476 on MITRE CWE →