CVE-2024-46786— fscache: delete fscache_cookie_lru_timer when fscache exits to avoid UAF
Get alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2024-46786
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗ Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
fscache: delete fscache_cookie_lru_timer when fscache exits to avoid UAF
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: fscache: delete fscache_cookie_lru_timer when fscache exits to avoid UAF The fscache_cookie_lru_timer is initialized when the fscache module is inserted, but is not deleted when the fscache module is removed. If timer_reduce() is called before removing the fscache module, the fscache_cookie_lru_timer will be added to the timer list of the current cpu. Afterwards, a use-after-free will be triggered in the softIRQ after removing the fscache module, as follows: ================================================================== BUG: unable to handle page fault for address: fffffbfff803c9e9 PF: supervisor read access in kernel mode PF: error_code(0x0000) - not-present page PGD 21ffea067 P4D 21ffea067 PUD 21ffe6067 PMD 110a7c067 PTE 0 Oops: Oops: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G W 6.11.0-rc3 #855 Tainted: [W]=WARN RIP: 0010:__run_timer_base.part.0+0x254/0x8a0 Call Trace: <IRQ> tmigr_handle_remote_up+0x627/0x810 __walk_groups.isra.0+0x47/0x140 tmigr_handle_remote+0x1fa/0x2f0 handle_softirqs+0x180/0x590 irq_exit_rcu+0x84/0xb0 sysvec_apic_timer_interrupt+0x6e/0x90 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:default_idle+0xf/0x20 default_idle_call+0x38/0x60 do_idle+0x2b5/0x300 cpu_startup_entry+0x54/0x60 start_secondary+0x20d/0x280 common_startup_64+0x13e/0x148 </TASK> Modules linked in: [last unloaded: netfs] ================================================================== Therefore delete fscache_cookie_lru_timer when removing the fscahe module.
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，该漏洞源于内存释放后重用。
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-2024-46786
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2024-46786
请登录查看更多情报信息。
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-2024-46786
No comments yet