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CVE-2023-53794

CRITICALCVSS 9.8/10EPSS 0.18%

Last modified

CVE-2023-53794 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. In the Linux kernel, the following vulnerability has been resolved: cifs: fix session state check in reconnect to avoid use-after-free issue Don't collect exiting session in smb2_reconnect_server(), because it will be released soon. Note that the exiting session will stay in server->smb_ses_list until it complete the cifs_free_ipc() and logoff() and then delete itself from the list.. EPSS estimates a 0.18% chance of exploitation in the next 30 days.

Description

In the Linux kernel, the following vulnerability has been resolved: cifs: fix session state check in reconnect to avoid use-after-free issue Don't collect exiting session in smb2_reconnect_server(), because it will be released soon. Note that the exiting session will stay in server->smb_ses_list until it complete the cifs_free_ipc() and logoff() and then delete itself from the list.

Metrics

CVSS 3.1
9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
0.18%

7.4th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 4fcd1813e6404dd4420c7d12fb483f9320f0bf93, < 7e4f5c3f01fb0e51ca438e43262d858daf9a0a76; >= 4fcd1813e6404dd4420c7d12fb483f9320f0bf93, < 759ffc164d95a32c09528766d74d9b4fb054e8f4; >= 4fcd1813e6404dd4420c7d12fb483f9320f0bf93, < 99f280700b4cc02d5f141b8d15f8e9fad0418f65; 655e0c067f0e02ece03fd0591dabe3db2ae27552; 875cc09c0767a4ac06b57af383709657f98b3ea1; 599fe1409085059ba12a2c3897c853be9fa9e7cf; 2e4378ee60049b752c9dce16f62ce6fbd11b379a; 59b520454b323ec43b2ae757217332cea33091e0; e20c888e2b3576e5f498c167729d274ef60b86f8; 4ce7aa4e44d88ce64ea8ae2337b8910f3670b0ba; 419fad68e4c4135ff9859e9214dd6cf954413ca1; >= 3.10.103, < 3.11; >= 3.12.63, < 3.13; >= 3.14.74, < 3.15; >= 3.16.37, < 3.17; >= 3.18.37, < 3.19; >= 4.1.28, < 4.2; >= 4.4.16, < 4.5; >= 4.6.5, < 4.7
LinuxLinux4.7

References

Timeline

Published
Last Modified
Status
Deferred

Frequently Asked Questions

What is CVE-2023-53794?
In the Linux kernel, the following vulnerability has been resolved: cifs: fix session state check in reconnect to avoid use-after-free issue Don't collect exiting session in smb2_reconnect_server(), because it will be released soon. Note that the exiting session will stay in server->smb_ses_list until it complete the cifs_free_ipc() and logoff() and then delete itself from the list.
How severe is CVE-2023-53794?
CVE-2023-53794 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.18% probability of exploitation in the next 30 days.
How do I fix CVE-2023-53794?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST