CVE-2022-50080 (GCVE-0-2022-50080)
Vulnerability from cvelistv5 – Published: 2025-06-18 11:02 – Updated: 2025-06-18 11:02
VLAI?
Title
tee: add overflow check in register_shm_helper()
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Linux | Linux |
Affected:
033ddf12bcf5326b93bd604f50a7474a434a35f9 , < b37e0f17653c00b586cdbcdf0dbca475358ecffd
(git)
Affected: 033ddf12bcf5326b93bd604f50a7474a434a35f9 , < 965333345fe952cc7eebc8e3a565ffc709441af2 (git) Affected: 033ddf12bcf5326b93bd604f50a7474a434a35f9 , < 578c349570d2a912401963783b36e0ec7a25c053 (git) Affected: 033ddf12bcf5326b93bd604f50a7474a434a35f9 , < c12f0e6126ad223806a365084e86370511654bf1 (git) Affected: 033ddf12bcf5326b93bd604f50a7474a434a35f9 , < 2f8e79a1a6128214cb9b205a9869341af5dfb16b (git) Affected: 033ddf12bcf5326b93bd604f50a7474a434a35f9 , < 58c008d4d398f792ca67f35650610864725518fd (git) Affected: 033ddf12bcf5326b93bd604f50a7474a434a35f9 , < 573ae4f13f630d6660008f1974c0a8a29c30e18a (git) |
|||||||
|
|||||||||
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/tee/tee_shm.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "b37e0f17653c00b586cdbcdf0dbca475358ecffd",
"status": "affected",
"version": "033ddf12bcf5326b93bd604f50a7474a434a35f9",
"versionType": "git"
},
{
"lessThan": "965333345fe952cc7eebc8e3a565ffc709441af2",
"status": "affected",
"version": "033ddf12bcf5326b93bd604f50a7474a434a35f9",
"versionType": "git"
},
{
"lessThan": "578c349570d2a912401963783b36e0ec7a25c053",
"status": "affected",
"version": "033ddf12bcf5326b93bd604f50a7474a434a35f9",
"versionType": "git"
},
{
"lessThan": "c12f0e6126ad223806a365084e86370511654bf1",
"status": "affected",
"version": "033ddf12bcf5326b93bd604f50a7474a434a35f9",
"versionType": "git"
},
{
"lessThan": "2f8e79a1a6128214cb9b205a9869341af5dfb16b",
"status": "affected",
"version": "033ddf12bcf5326b93bd604f50a7474a434a35f9",
"versionType": "git"
},
{
"lessThan": "58c008d4d398f792ca67f35650610864725518fd",
"status": "affected",
"version": "033ddf12bcf5326b93bd604f50a7474a434a35f9",
"versionType": "git"
},
{
"lessThan": "573ae4f13f630d6660008f1974c0a8a29c30e18a",
"status": "affected",
"version": "033ddf12bcf5326b93bd604f50a7474a434a35f9",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/tee/tee_shm.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "4.16"
},
{
"lessThan": "4.16",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"version": "4.19.256",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.211",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.137",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.62",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.18.*",
"status": "unaffected",
"version": "5.18.19",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.19.*",
"status": "unaffected",
"version": "5.19.3",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.0",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "4.19.256",
"versionStartIncluding": "4.16",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.4.211",
"versionStartIncluding": "4.16",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.137",
"versionStartIncluding": "4.16",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.62",
"versionStartIncluding": "4.16",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.18.19",
"versionStartIncluding": "4.16",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.19.3",
"versionStartIncluding": "4.16",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.0",
"versionStartIncluding": "4.16",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntee: add overflow check in register_shm_helper()\n\nWith special lengths supplied by user space, register_shm_helper() has\nan integer overflow when calculating the number of pages covered by a\nsupplied user space memory region.\n\nThis causes internal_get_user_pages_fast() a helper function of\npin_user_pages_fast() to do a NULL pointer dereference:\n\n Unable to handle kernel NULL pointer dereference at virtual address 0000000000000010\n Modules linked in:\n CPU: 1 PID: 173 Comm: optee_example_a Not tainted 5.19.0 #11\n Hardware name: QEMU QEMU Virtual Machine, BIOS 0.0.0 02/06/2015\n pc : internal_get_user_pages_fast+0x474/0xa80\n Call trace:\n internal_get_user_pages_fast+0x474/0xa80\n pin_user_pages_fast+0x24/0x4c\n register_shm_helper+0x194/0x330\n tee_shm_register_user_buf+0x78/0x120\n tee_ioctl+0xd0/0x11a0\n __arm64_sys_ioctl+0xa8/0xec\n invoke_syscall+0x48/0x114\n\nFix this by adding an an explicit call to access_ok() in\ntee_shm_register_user_buf() to catch an invalid user space address\nearly."
}
],
"providerMetadata": {
"dateUpdated": "2025-06-18T11:02:23.003Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/b37e0f17653c00b586cdbcdf0dbca475358ecffd"
},
{
"url": "https://git.kernel.org/stable/c/965333345fe952cc7eebc8e3a565ffc709441af2"
},
{
"url": "https://git.kernel.org/stable/c/578c349570d2a912401963783b36e0ec7a25c053"
},
{
"url": "https://git.kernel.org/stable/c/c12f0e6126ad223806a365084e86370511654bf1"
},
{
"url": "https://git.kernel.org/stable/c/2f8e79a1a6128214cb9b205a9869341af5dfb16b"
},
{
"url": "https://git.kernel.org/stable/c/58c008d4d398f792ca67f35650610864725518fd"
},
{
"url": "https://git.kernel.org/stable/c/573ae4f13f630d6660008f1974c0a8a29c30e18a"
}
],
"title": "tee: add overflow check in register_shm_helper()",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2022-50080",
"datePublished": "2025-06-18T11:02:23.003Z",
"dateReserved": "2025-06-18T10:57:27.409Z",
"dateUpdated": "2025-06-18T11:02:23.003Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
Loading…