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CVE-2022-50080— tee: add overflow check in register_shm_helper()

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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register_shm_helper函数整数溢出导致空指针取消引用。

AI Predicted 7.8 Difficulty: Moderate EPSS 0.27% · P18

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux 033ddf12bcf5326b93bd604f50a7474a434a35f9< b37e0f17653c00b586cdbcdf0dbca475358ecffd affected
033ddf12bcf5326b93bd604f50a7474a434a35f9< 965333345fe952cc7eebc8e3a565ffc709441af2 affected
033ddf12bcf5326b93bd604f50a7474a434a35f9< 578c349570d2a912401963783b36e0ec7a25c053 affected
033ddf12bcf5326b93bd604f50a7474a434a35f9< c12f0e6126ad223806a365084e86370511654bf1 affected
033ddf12bcf5326b93bd604f50a7474a434a35f9< 2f8e79a1a6128214cb9b205a9869341af5dfb16b affected
033ddf12bcf5326b93bd604f50a7474a434a35f9< 58c008d4d398f792ca67f35650610864725518fd affected
033ddf12bcf5326b93bd604f50a7474a434a35f9< 573ae4f13f630d6660008f1974c0a8a29c30e18a affected
4.16 affected
… +8 more rows
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I. Basic Information for CVE-2022-50080

Vulnerability Information
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Vulnerability Title
tee: add overflow check in register_shm_helper()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: tee: add overflow check in register_shm_helper() With special lengths supplied by user space, register_shm_helper() has an integer overflow when calculating the number of pages covered by a supplied user space memory region. This causes internal_get_user_pages_fast() a helper function of pin_user_pages_fast() to do a NULL pointer dereference: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000010 Modules linked in: CPU: 1 PID: 173 Comm: optee_example_a Not tainted 5.19.0 #11 Hardware name: QEMU QEMU Virtual Machine, BIOS 0.0.0 02/06/2015 pc : internal_get_user_pages_fast+0x474/0xa80 Call trace: internal_get_user_pages_fast+0x474/0xa80 pin_user_pages_fast+0x24/0x4c register_shm_helper+0x194/0x330 tee_shm_register_user_buf+0x78/0x120 tee_ioctl+0xd0/0x11a0 __arm64_sys_ioctl+0xa8/0xec invoke_syscall+0x48/0x114 Fix this by adding an an explicit call to access_ok() in tee_shm_register_user_buf() to catch an invalid user space address early.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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register_shm_helper函数整数溢出导致空指针取消引用。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux 033ddf12bcf5326b93bd604f50a7474a434a35f9 ~ b37e0f17653c00b586cdbcdf0dbca475358ecffd -
Linux Linux 4.16 -

II. Public POCs for CVE-2022-50080

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III. Intelligence Information for CVE-2022-50080

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Patches & Fixes for CVE-2022-50080 (1)

Same Patch Batch · Linux · 2025-06-18 · 362 CVEs total

CVE-2025-38075 9.8 CRITICAL scsi: target: iscsi: Fix timeout on deleted connection
CVE-2022-50098 8.8 HIGH scsi: qla2xxx: Fix crash due to stale SRB access around I/O timeouts
CVE-2025-38052 8.8 HIGH net/tipc: fix slab-use-after-free Read in tipc_aead_encrypt_done
CVE-2022-49934 8.8 HIGH wifi: mac80211: Fix UAF in ieee80211_scan_rx()
CVE-2022-50164 8.8 HIGH wifi: iwlwifi: mvm: fix double list_add at iwl_mvm_mac_wake_tx_queue
CVE-2025-38016 8.8 HIGH HID: bpf: abort dispatch if device destroyed
CVE-2025-38074 8.8 HIGH vhost-scsi: protect vq->log_used with vq->mutex
CVE-2022-49974 8.8 HIGH HID: nintendo: fix rumble worker null pointer deref
CVE-2022-49968 8.0 HIGH ieee802154/adf7242: defer destroy_workqueue call
CVE-2022-49939 7.8 HIGH binder: fix UAF of ref->proc caused by race condition
CVE-2022-50022 7.8 HIGH drivers:md:fix a potential use-after-free bug
CVE-2022-50028 7.8 HIGH gadgetfs: ep_io - wait until IRQ finishes
CVE-2022-49935 7.8 HIGH dma-buf/dma-resv: check if the new fence is really later
CVE-2025-38082 7.8 HIGH gpio: virtuser: fix potential out-of-bound write
CVE-2022-50182 7.8 HIGH media: imx-jpeg: Align upwards buffer size
CVE-2025-38080 7.8 HIGH drm/amd/display: Increase block_sequence array size
CVE-2025-38079 7.8 HIGH crypto: algif_hash - fix double free in hash_accept
CVE-2025-38060 7.8 HIGH bpf: copy_verifier_state() should copy 'loop_entry' field
CVE-2025-38062 7.8 HIGH genirq/msi: Store the IOMMU IOVA directly in msi_desc instead of iommu_cookie
CVE-2022-50101 7.8 HIGH video: fbdev: vt8623fb: Check the size of screen before memset_io()

Showing top 20 of 362 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2022-50080

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