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Fencer Vulns
medium 5.5

CVE-2024-42242 json

mmc: sdhci: Fix max_seg_size for 64KiB PAGE_SIZE

published 2024-08-07 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-39465

cvss
5.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 7%
public exploits
0
none known

Summary

In the Linux kernel, the following vulnerability has been resolved:

mmc: sdhci: Fix max_seg_size for 64KiB PAGE_SIZE

blk_queue_max_segment_size() ensured:

if (max_size < PAGE_SIZE) max_size = PAGE_SIZE;

whereas:

blk_validate_limits() makes it an error:

if (WARN_ON_ONCE(lim->max_segment_size < PAGE_SIZE)) return -EINVAL;

The change from one to the other, exposed sdhci which was setting maximum segment size too low in some circumstances.

Fix the maximum segment size when it is too low.

Patch / fix

  • Linux Linux 6.9.10, 6.10
  • linux Debian 14, Debian 13 6.9.10-1

debian advisories DEBIAN-CVE-2024-42242

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-42242 updated cvss 5.5

kernel: mmc: sdhci: Fix max_seg_size for 64KiB PAGE_SIZE

  • Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +83 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.18% chance of exploitation in the next 30 days, higher than 7% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Linux Linux

Classification

Weakness
  • CWE-770 Allocation of Resources Without Limits or Throttling
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.