Vulnerability Details : CVE-2023-6039
A use-after-free flaw was found in lan78xx_disconnect in drivers/net/usb/lan78xx.c in the network sub-component, net/usb/lan78xx in the Linux Kernel. This flaw allows a local attacker to crash the system when the LAN78XX USB device detaches.
Vulnerability category: Memory Corruption
Products affected by CVE-2023-6039
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.5:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.5:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.5:rc3:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.5:rc4:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2023-6039
0.04%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 6 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2023-6039
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
5.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
NIST | |
5.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
Red Hat, Inc. |
CWE ids for CVE-2023-6039
-
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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.Assigned by:
- nvd@nist.gov (Primary)
- secalert@redhat.com (Secondary)
References for CVE-2023-6039
-
https://access.redhat.com/security/cve/CVE-2023-6039
CVE-2023-6039- Red Hat Customer PortalThird Party Advisory
-
https://github.com/torvalds/linux/commit/1e7417c188d0a83fb385ba2dbe35fd2563f2b6f3
net: usb: lan78xx: reorder cleanup operations to avoid UAF bugs · torvalds/linux@1e7417c · GitHubPatch
-
https://bugzilla.redhat.com/show_bug.cgi?id=2248755
2248755 – (CVE-2023-6039) CVE-2023-6039 kernel: use-after-free in drivers/net/usb/lan78xx.c in lan78xx_disconnectIssue Tracking;Patch;Third Party Advisory
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