CVE-2023-53597

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Source
https://cve.org/CVERecord?id=CVE-2023-53597
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-53597.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2023-53597
Downstream
Related
Published
2025-10-04T15:44:09.616Z
Modified
2026-03-20T12:33:14.845008Z
Summary
cifs: fix mid leak during reconnection after timeout threshold
Details

In the Linux kernel, the following vulnerability has been resolved:

cifs: fix mid leak during reconnection after timeout threshold

When the number of responses with status of STATUSIOTIMEOUT exceeds a specified threshold (NUMSTATUSIO_TIMEOUT), we reconnect the connection. But we do not return the mid, or the credits returned for the mid, or reduce the number of in-flight requests.

This bug could result in the server->in_flight count to go bad, and also cause a leak in the mids.

This change moves the check to a few lines below where the response is decrypted, even of the response is read from the transform header. This way, the code for returning the mids can be reused.

Also, the cifs_reconnect was reconnecting just the transport connection before. In case of multi-channel, this may not be what we want to do after several timeouts. Changed that to reconnect the session and the tree too.

Also renamed NUMSTATUSIOTIMEOUT to a more appropriate name MAXSTATUSIOTIMEOUT.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53597.json",
    "cna_assigner": "Linux"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
8e670f77c4a55013db6d23b962f9bf6673a5e7b6
Fixed
df31d05f0678cdd0796ea19983a2b93edca18bb0
Fixed
c55901d381a22300c9922170e59704059f50977b
Fixed
57d25e9905c71133e201f6d06b56a3403d4ad433
Fixed
69cba9d3c1284e0838ae408830a02c4a063104bc
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last affected
fa6d7a5853f93efb088aba36af12cb1944156411

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-53597.json"