CVE-2024-46795— ksmbd: unset the binding mark of a reused connection
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I. Basic Information for CVE-2024-46795
Vulnerability Information
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Vulnerability Title
ksmbd: unset the binding mark of a reused connection
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ksmbd: unset the binding mark of a reused connection Steve French reported null pointer dereference error from sha256 lib. cifs.ko can send session setup requests on reused connection. If reused connection is used for binding session, conn->binding can still remain true and generate_preauth_hash() will not set sess->Preauth_HashValue and it will be NULL. It is used as a material to create an encryption key in ksmbd_gen_smb311_encryptionkey. ->Preauth_HashValue cause null pointer dereference error from crypto_shash_update(). BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: 0000 [#1] PREEMPT SMP PTI CPU: 8 PID: 429254 Comm: kworker/8:39 Hardware name: LENOVO 20MAS08500/20MAS08500, BIOS N2CET69W (1.52 ) Workqueue: ksmbd-io handle_ksmbd_work [ksmbd] RIP: 0010:lib_sha256_base_do_update.isra.0+0x11e/0x1d0 [sha256_ssse3] <TASK> ? show_regs+0x6d/0x80 ? __die+0x24/0x80 ? page_fault_oops+0x99/0x1b0 ? do_user_addr_fault+0x2ee/0x6b0 ? exc_page_fault+0x83/0x1b0 ? asm_exc_page_fault+0x27/0x30 ? __pfx_sha256_transform_rorx+0x10/0x10 [sha256_ssse3] ? lib_sha256_base_do_update.isra.0+0x11e/0x1d0 [sha256_ssse3] ? __pfx_sha256_transform_rorx+0x10/0x10 [sha256_ssse3] ? __pfx_sha256_transform_rorx+0x10/0x10 [sha256_ssse3] _sha256_update+0x77/0xa0 [sha256_ssse3] sha256_avx2_update+0x15/0x30 [sha256_ssse3] crypto_shash_update+0x1e/0x40 hmac_update+0x12/0x20 crypto_shash_update+0x1e/0x40 generate_key+0x234/0x380 [ksmbd] generate_smb3encryptionkey+0x40/0x1c0 [ksmbd] ksmbd_gen_smb311_encryptionkey+0x72/0xa0 [ksmbd] ntlm_authenticate.isra.0+0x423/0x5d0 [ksmbd] smb2_sess_setup+0x952/0xaa0 [ksmbd] __process_request+0xa3/0x1d0 [ksmbd] __handle_ksmbd_work+0x1c4/0x2f0 [ksmbd] handle_ksmbd_work+0x2d/0xa0 [ksmbd] process_one_work+0x16c/0x350 worker_thread+0x306/0x440 ? __pfx_worker_thread+0x10/0x10 kthread+0xef/0x120 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x44/0x70 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1b/0x30 </TASK>
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于空指针取消引用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2024-46795
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Same Patch Batch · Linux · 2024-09-18 · 85 CVEs total
| CVE-2024-46771 | can: bcm: Remove proc entry when dev is unregistered. | |
| CVE-2024-46780 | nilfs2: protect references to superblock parameters exposed in sysfs | |
| CVE-2024-46767 | net: phy: Fix missing of_node_put() for leds | |
| CVE-2024-46768 | hwmon: (hp-wmi-sensors) Check if WMI event data exists | |
| CVE-2024-46766 | ice: move netif_queue_set_napi to rtnl-protected sections | |
| CVE-2024-46763 | fou: Fix null-ptr-deref in GRO. | |
| CVE-2024-46762 | xen: privcmd: Fix possible access to a freed kirqfd instance | |
| CVE-2024-46761 | pci/hotplug/pnv_php: Fix hotplug driver crash on Powernv | |
| CVE-2024-46760 | wifi: rtw88: usb: schedule rx work after everything is set up | |
| CVE-2024-46765 | ice: protect XDP configuration with a mutex | |
| CVE-2024-46769 | spi: intel: Add check devm_kasprintf() returned value | |
| CVE-2024-46770 | ice: Add netif_device_attach/detach into PF reset flow | |
| CVE-2024-46772 | drm/amd/display: Check denominator crb_pipes before used | |
| CVE-2024-46773 | drm/amd/display: Check denominator pbn_div before used | |
| CVE-2024-46774 | powerpc/rtas: Prevent Spectre v1 gadget construction in sys_rtas() | |
| CVE-2024-46775 | drm/amd/display: Validate function returns | |
| CVE-2024-46776 | drm/amd/display: Run DC_LOG_DC after checking link->link_enc | |
| CVE-2024-46777 | udf: Avoid excessive partition lengths | |
| CVE-2024-46778 | drm/amd/display: Check UnboundedRequestEnabled's value | |
| CVE-2024-46779 | drm/imagination: Free pvr_vm_gpuva after unlink |
Showing top 20 of 85 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
Same vendor: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
V. Comments for CVE-2024-46795
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