7.8

CVE-2022-50630: linux

CVSS: 7.8v3.1HighDeferred
AliasesUBUNTU-CVE-2022-50630DEBIAN-CVE-2022-50630
Published 08-12-2025Last modified 15-10-2026
Open JSON

Vulnerability summary

CVE-2022-50630 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.15% chance of exploitation in the next 30 days, higher than 4% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.15%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 8 · Related 7
RHSA-2023:6583SUSE-SU-2026:0263-1SUSE-SU-2026:0316-1SUSE-SU-2026:0317-1SUSE-SU-2026:0350-1SUSE-SU-2026:0369-1

Timeline

  1. 08-12-2025
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: mm: hugetlb: fix UAF in hugetlb_handle_userfault The vma_lock and hugetlb_fault_mutex are dropped before handling userfault and reacquire them again after handle_userfault(), but reacquire the vma_lock could lead to UAF[1,2] due to the following race, hugetlb_fault hugetlb_no_page /*unlock vma_lock */ hugetlb_handle_userfault handle_userfault /* unlock mm->mmap_lock*/ vm_mmap_pgoff do_mmap mmap_region munmap_vma_range /* clean old vma */ /* lock vma_lock again <--- UAF */ /* unlock vma_lock */ Since the vma_lock will unlock immediately after hugetlb_handle_userfault(), let's drop the unneeded lock and unlock in hugetlb_handle_userfault() to fix the issue. [1] https://lore.kernel.org/linux-mm/000000000000d5e00a05e834962e@google.com/ [2] https://lore.kernel.org/linux-mm/20220921014457.1668-1-liuzixian4@huawei.com/

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.15%

Chance of exploitation in the next 30 days

Percentile

4%

Versus all other CVEs

30-day change

0.00 pp

From 0.15% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.15%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu119 products
  • linuxAll versions (No fix recorded) | < 5.15.0-60.66
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1030.34
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.0.3-1
Linux1 product
  • linux≥ 1a1aad8a9b7bd34f60cdf98cd7915f00ae892c45, < 45c33966759ea1b4040c08dacda99ef623c0ca29 | ≥ 1a1aad8a9b7bd34f60cdf98cd7915f00ae892c45, < 0db2efb3bff879566f05341d94c3de00ac95c4cc | ≥ 1a1aad8a9b7bd34f60cdf98cd7915f00ae892c45, < dd691973f67b2800a97db723b1ff6f07fdcf7f5a | ≥ 1a1aad8a9b7bd34f60cdf98cd7915f00ae892c45, < 78504bcedb2f1bbfb353b4d233c24d641c4dda33 | ≥ 1a1aad8a9b7bd34f60cdf98cd7915f00ae892c45, < 958f32ce832ba781ac20e11bb2d12a9352ea28fc | 4.11

3 vendors · 121 products

References

9 links