mm: avoid overflows in dirty throttling logic
Priority LOW 20CWE-190Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 16 fixed, 3 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-190 and the CVSS impact.
Summary
In the Linux kernel, the following vulnerability has been resolved: mm: avoid overflows in dirty throttling logic The dirty throttling logic is interspersed with assumptions that dirty limits in PAGE_SIZE units fit into 32-bit (so that various multiplications fit into 64-bits). If limits end up being larger, we will hit overflows, possible divisions by 0 etc. Fix these problems by never allowing so large dirty limits as they have dubious practical value anyway. For dirty_bytes / dirty_background_bytes interfaces we can just refuse to set so large limits. For dirty_ratio / dirty_background_ratio it isn't so simple as the dirty limit is computed from the amount of available memory which can change due to memory hotplug etc. So when converting dirty limits from ratios to numbers of pages, we just don't allow the result to exceed UINT_MAX. This is root-only triggerable problem which occurs when the operator sets dirty limits to >16 TB.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00251 16th percentileScored 2026-11-07
Fix Partial Linux (Linux): 4.19.320, 5.4.282, 5.10.222 +5Red Hat: 5 advisoriesRed Hat: 16 fixed, 3 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 2.6.29 and later | 4.19.320, 5.4.282, 5.10.222, 5.15.163, 6.1.98, 6.6.39, 6.9.9, 6.10 | Patch available | CNA |
- Linux VendorLinux Affected 2.6.29 and later Fixed in 4.19.320, 5.4.282, 5.10.222, 5.15.163, 6.1.98, 6.6.39, 6.9.9, 6.10 Patch available CNA
CPE configurations NVD · 7
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | before 4.19.320; 4.20 to before 5.4.282; 5.5 to before 5.10.222; 5.11 to before 5.15.163; 5.16 to before 6.1.98; 6.2 to before 6.6.39; 6.7 to before 6.9.9 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.10:rc1:*:*:*:*:*:* | 6.10 rc1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.10:rc2:*:*:*:*:*:* | 6.10 rc2 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.10:rc3:*:*:*:*:*:* | 6.10 rc3 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.10:rc4:*:*:*:*:*:* | 6.10 rc4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.10:rc5:*:*:*:*:*:* | 6.10 rc5 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.10:rc6:*:*:*:*:*:* | 6.10 rc6 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions before 4.19.320; 4.20 to before 5.4.282; 5.5 to before 5.10.222; 5.11 to before 5.15.163; 5.16 to before 6.1.98; 6.2 to before 6.6.39; 6.7 to before 6.9.9 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.10:rc1:*:*:*:*:*:* Versions 6.10 rc1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.10:rc2:*:*:*:*:*:* Versions 6.10 rc2 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.10:rc3:*:*:*:*:*:* Versions 6.10 rc3 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.10:rc4:*:*:*:*:*:* Versions 6.10 rc4 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.10:rc5:*:*:*:*:*:* Versions 6.10 rc5 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.10:rc6:*:*:*:*:*:* Versions 6.10 rc6 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 4.19.320, 5.4.282, 5.10.222, 5.15.163, 6.1.98, 6.6.39, 6.9.9, 6.10
Red Hat 5 advisories
- RHSA-2024:7000 Released 2024-09-24 · Red Hat rating Importantkernel security update
- Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.22.1.el8_10, kernel-4.18.0-553.22.1.el8_10, kernel-abi-stablelists-4.18.0-553.22.1.el8_10 +19
- Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.22.1.el8_10
- RHSA-2024:7001 Released 2024-09-24 · Red Hat rating Importantkernel-rt security update
- Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-553.22.1.rt7.363.el8_10, kernel-rt-core-4.18.0-553.22.1.rt7.363.el8_10, kernel-rt-debug-4.18.0-553.22.1.rt7.363.el8_10 +9
- Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-553.22.1.rt7.363.el8_10, kernel-rt-core-4.18.0-553.22.1.rt7.363.el8_10, kernel-rt-debug-4.18.0-553.22.1.rt7.363.el8_10 +7
- RHSA-2024:6567 Released 2024-09-11 · Red Hat rating Moderatekernel security update
- Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-427.35.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.35.1.el9_4, kernel-64k-devel-5.14.0-427.35.1.el9_4 +11
- Red Hat Enterprise Linux BaseOS (v. 9) bpftool-7.3.0-427.35.1.el9_4, kernel-5.14.0-427.35.1.el9_4, kernel-64k-5.14.0-427.35.1.el9_4 +29
- Red Hat Enterprise Linux CRB (v. 9) kernel-tools-libs-devel-5.14.0-427.35.1.el9_4, libperf-5.14.0-427.35.1.el9_4
- Red Hat Enterprise Linux NFV (v. 9) kernel-rt-5.14.0-427.35.1.el9_4, kernel-rt-core-5.14.0-427.35.1.el9_4, kernel-rt-debug-5.14.0-427.35.1.el9_4 +11
- Red Hat Enterprise Linux RT (v. 9) kernel-rt-5.14.0-427.35.1.el9_4, kernel-rt-core-5.14.0-427.35.1.el9_4, kernel-rt-debug-5.14.0-427.35.1.el9_4 +9
Show 2 more Red Hat advisories
- RHSA-2024:6267 Released 2024-09-04 · Red Hat rating Moderatekernel security update
- Red Hat CodeReady Linux Builder EUS (v.9.2) kernel-tools-libs-devel-5.14.0-284.82.1.el9_2
- Red Hat Enterprise Linux AppStream EUS (v.9.2) kernel-64k-debug-devel-5.14.0-284.82.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.82.1.el9_2, kernel-64k-devel-5.14.0-284.82.1.el9_2 +9
- Red Hat Enterprise Linux BaseOS EUS (v.9.2) bpftool-7.0.0-284.82.1.el9_2, kernel-5.14.0-284.82.1.el9_2, kernel-64k-5.14.0-284.82.1.el9_2 +29
- RHSA-2024:6268 Released 2024-09-04 · Red Hat rating Moderatekernel-rt security update
- Red Hat Enterprise Linux Real Time EUS (v.9.2) kernel-rt-5.14.0-284.82.1.rt14.367.el9_2, kernel-rt-core-5.14.0-284.82.1.rt14.367.el9_2, kernel-rt-debug-5.14.0-284.82.1.rt14.367.el9_2 +9
- Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2) kernel-rt-5.14.0-284.82.1.rt14.367.el9_2, kernel-rt-core-5.14.0-284.82.1.rt14.367.el9_2, kernel-rt-debug-5.14.0-284.82.1.rt14.367.el9_2 +11
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 9 | Affected | No fix yet |
| RHOAI-2.13-RHEL-8 | Fixed | — |
| RHOAI-2.14-RHEL-8 | Fixed | — |
| Red Hat CodeReady Linux Builder EUS (v.9.2) | Fixed | RHSA-2024:6267 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2024:6567 |
| Red Hat Enterprise Linux AppStream EUS (v.9.2) | Fixed | RHSA-2024:6267 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2024:7000 |
| Red Hat Enterprise Linux BaseOS (v. 9) | Fixed | RHSA-2024:6567 |
| Red Hat Enterprise Linux BaseOS EUS (v.9.2) | Fixed | RHSA-2024:6267 |
| Red Hat Enterprise Linux CRB (v. 8) | Fixed | RHSA-2024:7000 |
| Red Hat Enterprise Linux CRB (v. 9) | Fixed | RHSA-2024:6567 |
| Red Hat Enterprise Linux NFV (v. 8) | Fixed | RHSA-2024:7001 |
| Red Hat Enterprise Linux NFV (v. 9) | Fixed | RHSA-2024:6567 |
| Red Hat Enterprise Linux RT (v. 8) | Fixed | RHSA-2024:7001 |
| Red Hat Enterprise Linux RT (v. 9) | Fixed | RHSA-2024:6567 |
| Red Hat Enterprise Linux Real Time EUS (v.9.2) | Fixed | RHSA-2024:6268 |
| Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2) | Fixed | RHSA-2024:6268 |
Not affected: 1 product
- Red Hat Enterprise Linux AppStream EUS (v.9.2)
Timeline
- 2026-10-02 Threatist record created from CVE-2024-42131
- 2026-10-03 Alias added: GHSA-vc72-g5gr-jp4w
- 2026-10-30 Fix available: RHOAI-2.13-RHEL-8, RHOAI-2.14-RHEL-8 · Red Hat
References
Patch 8
- https://git.kernel.org/stable/c/2b2d2b8766db028bd827af34075f221ae9e9efff
- https://git.kernel.org/stable/c/4d3817b64eda07491bdd86a234629fe0764fb42a
- https://git.kernel.org/stable/c/7a49389771ae7666f4dc3426e2a4594bf23ae290
- https://git.kernel.org/stable/c/a25e8536184516b55ef89ab91dd2eea429de28d2
- https://git.kernel.org/stable/c/c83ed422c24f0d4b264f89291d4fabe285f80dbc
- https://git.kernel.org/stable/c/bd16a7ee339aef3ee4c90cb23902afb6af379ea0
- https://git.kernel.org/stable/c/8e0b5e7f2895eccef5c2a0018b589266f90c4805
- https://git.kernel.org/stable/c/385d838df280eba6c8680f9777bfa0d0bfe7e8b2
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Sources
- CVE-2024-42131 · CVE Program
- CVE-2024-42131 · NVD
- FIRST EPSS
- GHSA-vc72-g5gr-jp4w · GitHub Advisory Database · CC BY 4.0
- CVE-2024-42131 · Red Hat security data · CC BY 4.0
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