DEBIAN-CVE-2024-53179
Record from OSV · Published December 27, 2024
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 cifs_mount() dfs_mount_share() get_session() cifs_mount_get_session() cifs_send_recv() cifs_get_smb_ses() compound_send_recv() cifs_setup_session() smb2_setup_request() kfree_sensitive() smb2_calc_signature() crypto_shash_setkey() *UAF* Fix this by ensuring that we have a valid @ses->auth_key.response by checking whether @ses->ses_status is SES_GOOD or SES_EXITING with @ses->ses_lock held. After commit 24a9799aa8ef ("smb: client: fix UAF in smb2_reconnect_server()"), we made sure to call ->logoff() only when @ses was known to be good (e.g. valid ->auth_key.response), so it's safe to access signing key when @ses->ses_status == SES_EXITING.
Fixed versions
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| Package | Ecosystem | Fixed in |
|---|---|---|
| linux | Debian:14 | 6.12.3-1 |
| linux | Debian:13 | 6.12.3-1 |
Risk scores
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Debian:12 | linux | 6.5.1-1~exp1, 0, 6.1.106-1 |
| Debian:14 | linux | 0 |
| Debian:13 | linux | 0 |
Timeline
- Dec 27, 2024 CVE Published
- Sep 15, 2026 CVE Updated
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