5.5

CVE-2024-40948: mm/page_table_check: fix crash on ZONE_DEVICE

Modified
AliasesUBUNTU-CVE-2024-40948DEBIAN-CVE-2024-40948
Published 12-07-2024Last modified 11-05-2026

Vulnerability summary

CVE-2024-40948 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.25% chance of exploitation in the next 30 days, higher than 16.2% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.25%
0%100%
Low · 0.00 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 15 · Related 12
DLA-4008-1DSA-5731-1RHSA-2024:9315SUSE-SU-2024:2802-1SUSE-SU-2024:2896-1SUSE-SU-2024:2973-1

Timeline

  1. 12-07-2024
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: mm/page_table_check: fix crash on ZONE_DEVICE Not all pages may apply to pgtable check. One example is ZONE_DEVICE pages: they map PFNs directly, and they don't allocate page_ext at all even if there's struct page around. One may reference devm_memremap_pages(). When both ZONE_DEVICE and page-table-check enabled, then try to map some dax memories, one can trigger kernel bug constantly now when the kernel was trying to inject some pfn maps on the dax device: kernel BUG at mm/page_table_check.c:55! While it's pretty legal to use set_pxx_at() for ZONE_DEVICE pages for page fault resolutions, skip all the checks if page_ext doesn't even exist in pgtable checker, which applies to ZONE_DEVICE but maybe more.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.25%

Chance of exploitation in the next 30 days

Percentile

16%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.25% 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.

Ubuntu92 products
  • linux< 6.8.0-44.44
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 6.8.0-1015.16
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ df4e817b710809425d899340dbfa8504a3ca4ba5, < 51897f99351fff7b57f4f141940fa93b4e90fd2b | ≥ df4e817b710809425d899340dbfa8504a3ca4ba5, < 84d3549d54f5ff9fa3281257be3019386f51d1a0 | ≥ df4e817b710809425d899340dbfa8504a3ca4ba5, < dec2382247860d2134c8d41e103e26460c099629 | ≥ df4e817b710809425d899340dbfa8504a3ca4ba5, < 8bb592c2eca8fd2bc06db7d80b38da18da4a2f43 | 5.17
  • linux_kernel≥ 5.17, < 6.1.96 | ≥ 6.2, < 6.6.36 | ≥ 6.7, < 6.9.7 | 6.10:rc1 | 6.10:rc2 | 6.10:rc3 | 6.10:rc4
Debian1 product
  • linux< 6.1.99-1 | < 6.9.7-1

3 vendors · 95 products

References

16 links
Show all 16 references