7.8

CVE-2022-49991: mm/hugetlb: avoid corrupting page->mapping in hugetlb_mcopy_atomic_pte

Modified
AliasesUBUNTU-CVE-2022-49991DEBIAN-CVE-2022-49991
Published 18-06-2025Last modified 05-08-2026

Vulnerability summary

CVE-2022-49991 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.26% chance of exploitation in the next 30 days, higher than 18.1% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.26%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 3
RHSA-2023:2458RHSA-2025:14744RHSA-2025:14749

Timeline

  1. 18-06-2025
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb: avoid corrupting page->mapping in hugetlb_mcopy_atomic_pte In MCOPY_ATOMIC_CONTINUE case with a non-shared VMA, pages in the page cache are installed in the ptes. But hugepage_add_new_anon_rmap is called for them mistakenly because they're not vm_shared. This will corrupt the page->mapping used by page cache code.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.26%

Chance of exploitation in the next 30 days

Percentile

18%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.26% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu94 products
  • linux< 5.15.0-57.63
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1027.31
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ f619147104c8ea71e120e4936d2b68ec11a1e527, < da60ddd80d09f8371fbba1a238a4b318d13ba698 | ≥ f619147104c8ea71e120e4936d2b68ec11a1e527, < 3ada1b3e58db255a14ec73a59d7913e84dc5a8a4 | ≥ f619147104c8ea71e120e4936d2b68ec11a1e527, < ab74ef708dc51df7cf2b8a890b9c6990fac5c0c6 | 5.13
  • linux_kernel≥ 5.13, < 5.15.65 | ≥ 5.16, < 5.19.6 | 6.0:rc1 | 6.0:rc2
Debian1 product
  • linux< 6.0.2-1

3 vendors · 97 products

References

6 links