CVE-2022-50080tee: add overflow check in register_shm_helper()
- 5.5MediumCVSS base score
- 0.27%Exploitation in 30 daysEPSS · top 81% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
Published
- 17 months later
· 17 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.27% · top 81% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 033ddf12bcf5326b93bd604f50a7474a434a35f9 – < b37e0f17653c00b586cdbcdf0dbca475358ecffd
- affected 033ddf12bcf5326b93bd604f50a7474a434a35f9 – < 965333345fe952cc7eebc8e3a565ffc709441af2
- affected 033ddf12bcf5326b93bd604f50a7474a434a35f9 – < 578c349570d2a912401963783b36e0ec7a25c053
- affected 033ddf12bcf5326b93bd604f50a7474a434a35f9 – < c12f0e6126ad223806a365084e86370511654bf1
- affected 033ddf12bcf5326b93bd604f50a7474a434a35f9 – < 2f8e79a1a6128214cb9b205a9869341af5dfb16b
- affected 033ddf12bcf5326b93bd604f50a7474a434a35f9 – < 58c008d4d398f792ca67f35650610864725518fd
- affected 033ddf12bcf5326b93bd604f50a7474a434a35f9 – < 573ae4f13f630d6660008f1974c0a8a29c30e18a
- affected 4.16
- unaffected < 4.16
- unaffected 4.19.256 – ≤ 4.19.*
- unaffected 5.4.211 – ≤ 5.4.*
- unaffected 5.10.137 – ≤ 5.10.*
- unaffected 5.15.62 – ≤ 5.15.*
- unaffected 5.18.19 – ≤ 5.18.*
- unaffected 5.19.3 – ≤ 5.19.*
- unaffected 6.0 – ≤ *
References
References7
- https://git.kernel.org/stable/c/b37e0f17653c00b586cdbcdf0dbca475358ecffd (opens in a new tab)
- https://git.kernel.org/stable/c/965333345fe952cc7eebc8e3a565ffc709441af2 (opens in a new tab)
- https://git.kernel.org/stable/c/578c349570d2a912401963783b36e0ec7a25c053 (opens in a new tab)
- https://git.kernel.org/stable/c/c12f0e6126ad223806a365084e86370511654bf1 (opens in a new tab)
- https://git.kernel.org/stable/c/2f8e79a1a6128214cb9b205a9869341af5dfb16b (opens in a new tab)
- https://git.kernel.org/stable/c/58c008d4d398f792ca67f35650610864725518fd (opens in a new tab)
- https://git.kernel.org/stable/c/573ae4f13f630d6660008f1974c0a8a29c30e18a (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2022-55349 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2022-50080)Record last updated .