AZL-55573
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-55573.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/AZL-55573
- Upstream
- Published
- 2024-12-27T14:15:25Z
- Modified
- 2026-04-01T05:18:39.883989Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- CVE-2024-53179 affecting package kernel for versions less than 6.6.76.1-1
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix use-after-free of signing key
Customers have reported use-after-free in @ses->auth_key.response with SMB2.1 + sign mounts which occurs due to following race:
task A task B cifsmount() dfsmountshare() getsession() cifsmountgetsession() cifssendrecv() cifsgetsmbses() compoundsendrecv() cifssetupsession() smb2setuprequest() kfreesensitive() smb2calcsignature() cryptoshash_setkey() UAF
Fix this by ensuring that we have a valid @ses->authkey.response by checking whether @ses->sesstatus is SESGOOD or SESEXITING with @ses->seslock held. After commit 24a9799aa8ef ("smb: client: fix UAF in smb2reconnectserver()"), we made sure to call ->logoff() only when @ses was known to be good (e.g. valid ->authkey.response), so it's safe to access signing key when @ses->sesstatus == SESEXITING.
- References