CVE-2024-42316

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Source
https://nvd.nist.gov/vuln/detail/CVE-2024-42316
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-42316.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2024-42316
Downstream
Related
Published
2024-08-17T09:15:11Z
Modified
2025-07-29T11:10:50.401376Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

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

mm/mglru: fix div-by-zero in vmpressurecalclevel()

evictfolios() uses a second pass to reclaim folios that have gone through page writeback and become clean before it finishes the first pass, since foliorotate_reclaimable() cannot handle those folios due to the isolation.

The second pass tries to avoid potential double counting by deducting scancontrol->nrscanned. However, this can result in underflow of nrscanned, under a condition where shrinkfoliolist() does not increment nrscanned, i.e., when folio_trylock() fails.

The underflow can cause the divisor, i.e., scale=scanned+reclaimed in vmpressurecalclevel(), to become zero, resulting in the following crash:

[exception RIP: vmpressureworkfn+101] processonework at ffffffffa3313f2b

Since scancontrol->nrscanned has no established semantics, the potential double counting has minimal risks. Therefore, fix the problem by not deducting scancontrol->nrscanned in evict_folios().

References

Affected packages

Debian:12 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
6.1.106-1

Affected versions

6.*

6.1.27-1
6.1.37-1
6.1.38-1
6.1.38-2~bpo11+1
6.1.38-2
6.1.38-3
6.1.38-4~bpo11+1
6.1.38-4
6.1.52-1
6.1.55-1~bpo11+1
6.1.55-1
6.1.64-1
6.1.66-1
6.1.67-1
6.1.69-1~bpo11+1
6.1.69-1
6.1.76-1~bpo11+1
6.1.76-1
6.1.82-1
6.1.85-1
6.1.90-1~bpo11+1
6.1.90-1
6.1.94-1~bpo11+1
6.1.94-1
6.1.98-1
6.1.99-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
6.10.3-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:11 / linux-6.1

Package

Name
linux-6.1
Purl
pkg:deb/debian/linux-6.1?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
6.1.119-1~deb11u1

Affected versions

6.*

6.1.106-3~deb11u1
6.1.106-3~deb11u2
6.1.106-3~deb11u3
6.1.112-1~deb11u1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}