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TI-2024-28108 Aliases CVE-2024-42102GHSA-3cf4-3gwv-8jwp

Revert "mm/writeback: fix possible divide-by-zero in wb_dirty_limits(), again"

Priority LOW 21CWE-369Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
High
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 10 fixed, 3 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-369.

Summary

In the Linux kernel, the following vulnerability has been resolved: Revert "mm/writeback: fix possible divide-by-zero in wb_dirty_limits(), again" Patch series "mm: Avoid possible overflows in dirty throttling". Dirty throttling logic assumes dirty limits in page units fit into 32-bits. This patch series makes sure this is true (see patch 2/2 for more details). This patch (of 2): This reverts commit 9319b647902cbd5cc884ac08a8a6d54ce111fc78. The commit is broken in several ways. Firstly, the removed (u64) cast from the multiplication will introduce a multiplication overflow on 32-bit archs if wb_thresh * bg_thresh >= 1<<32 (which is actually common - the default settings with 4GB of RAM will trigger this). Secondly, the div64_u64() is unnecessarily expensive on 32-bit archs. We have div64_ul() in case we want to be safe & cheap. Thirdly, if dirty thresholds are larger than 1<<32 pages, then dirty balancing is going to blow up in many other spectacular ways anyway so trying to fix one possible overflow is just moot.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00256 17th percentileScored 2026-11-07
Fix Partial Linux (Linux): 4.19.318, 5.4.280, 5.10.222 +6Red Hat: 3 advisoriesRed Hat: 10 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

VendorProductAffected versionsFixed inStatusSource
LinuxLinux4.19.307 to before 4.19.318; 5.4.269 to before 5.4.280; 5.10.210 to before 5.10.222; 5.15.149 to before 5.15.163; 6.1.79 to before 6.1.98; 6.6.18 to before 6.6.39; 6.7.6 to before 6.84.19.318, 5.4.280, 5.10.222, 5.15.163, 6.1.98, 6.6.39, 6.8Patch availableCNA
LinuxLinux6.8 and later4.19.318, 5.4.280, 5.10.222, 5.15.163, 6.1.98, 6.6.39, 6.9.9, 6.10Patch availableCNA
  • Linux VendorLinux Affected 4.19.307 to before 4.19.318; 5.4.269 to before 5.4.280; 5.10.210 to before 5.10.222; 5.15.149 to before 5.15.163; 6.1.79 to before 6.1.98; 6.6.18 to before 6.6.39; 6.7.6 to before 6.8 Fixed in 4.19.318, 5.4.280, 5.10.222, 5.15.163, 6.1.98, 6.6.39, 6.8 Patch available CNA
  • Linux VendorLinux Affected 6.8 and later Fixed in 4.19.318, 5.4.280, 5.10.222, 5.15.163, 6.1.98, 6.6.39, 6.9.9, 6.10 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*4.19.307 to before 4.19.318; 5.4.269 to before 5.4.280; 5.10.210 to before 5.10.222; 5.15.149 to before 5.15.163; 6.1.79 to before 6.1.98; 6.6.18 to before 6.6.39; 6.8 to before 6.9.9VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 4.19.307 to before 4.19.318; 5.4.269 to before 5.4.280; 5.10.210 to before 5.10.222; 5.15.149 to before 5.15.163; 6.1.79 to before 6.1.98; 6.6.18 to before 6.6.39; 6.8 to before 6.9.9 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 4.19.318, 5.4.280, 5.10.222, 5.15.163, 6.1.98, 6.6.39, 6.8
  • Fix · CNA Linux (Linux) Fixed in 4.19.318, 5.4.280, 5.10.222, 5.15.163, 6.1.98, 6.6.39, 6.9.9, 6.10

Red Hat 3 advisories

  • RHSA-2024:6567 Released 2024-09-11 · Red Hat rating Moderate
    kernel 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
  • RHSA-2024:6267 Released 2024-09-04 · Red Hat rating Moderate
    kernel 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 Moderate
    kernel-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 →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 9AffectedNo fix yet
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. 9)Fixed RHSA-2024:6567
Red Hat Enterprise Linux BaseOS EUS (v.9.2)Fixed RHSA-2024:6267
Red Hat Enterprise Linux CRB (v. 9)Fixed RHSA-2024:6567
Red Hat Enterprise Linux NFV (v. 9)Fixed RHSA-2024:6567
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: 2 products
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux AppStream EUS (v.9.2)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-42102
  2. 2026-10-03 Alias added: GHSA-3cf4-3gwv-8jwp
  3. 2026-11-05 Affected versions changed · Red Hat

References

Patch 8

  • TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
  • TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
  • TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
  • TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
  • TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
See all 15278 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences