CVE-2024-26720

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

Published Apr 3, 2024 CVSS 3.1 · 5.5 Medium EPSS n/a KEV · Not listed

Description

This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.

Affected Products

No data.

Package	CPE	Advisory	Released Date
Red Hat Enterprise Linux 8
kernel-rt-0:4.18.0-553.22.1.rt7.363.el8_10	cpe:/a:redhat:enterprise_linux:8::nfv	RHSA-2024:7001	2024-09-24T00:00:00Z
kernel-0:4.18.0-553.22.1.el8_10	cpe:/o:redhat:enterprise_linux:8	RHSA-2024:7000	2024-09-24T00:00:00Z
Red Hat Enterprise Linux 8.8 Extended Update Support
kernel-0:4.18.0-477.70.1.el8_8	cpe:/o:redhat:rhel_eus:8.8	RHSA-2024:6206	2024-09-03T00:00:00Z
Red Hat Enterprise Linux 9
kernel-0:5.14.0-427.35.1.el9_4	cpe:/a:redhat:enterprise_linux:9	RHSA-2024:6567	2024-09-11T00:00:00Z
kernel-0:5.14.0-427.35.1.el9_4	cpe:/o:redhat:enterprise_linux:9	RHSA-2024:6567	2024-09-11T00:00:00Z
Red Hat Enterprise Linux 9.2 Extended Update Support
kernel-0:5.14.0-284.73.1.el9_2	cpe:/a:redhat:rhel_eus:9.2	RHSA-2024:4533	2024-07-15T00:00:00Z
kernel-rt-0:5.14.0-284.73.1.rt14.358.el9_2	cpe:/a:redhat:rhel_eus:9.2::nfv	RHSA-2024:4554	2024-07-15T00:00:00Z

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

Source	ID	Title
Debian DLA	DLA-3840-1	linux security update
Debian DLA	DLA-3842-1	linux-5.10 security update
Debian DSA	DSA-5658-1	linux security update
Debian DSA	DSA-5681-1	linux security update
Ubuntu USN	USN-6766-1	Linux kernel vulnerabilities
Ubuntu USN	USN-6766-2	Linux kernel vulnerabilities
Ubuntu USN	USN-6766-3	Linux kernel (AWS) vulnerabilities
Ubuntu USN	USN-6767-1	Linux kernel vulnerabilities
Ubuntu USN	USN-6767-2	Linux kernel (BlueField) vulnerabilities
Ubuntu USN	USN-6795-1	Linux kernel (Intel IoTG) vulnerabilities
Ubuntu USN	USN-6828-1	Linux kernel (Intel IoTG) vulnerabilities
Ubuntu USN	USN-6865-1	Linux kernel vulnerabilities
Ubuntu USN	USN-6866-1	Linux kernel vulnerabilities
Ubuntu USN	USN-6866-2	Linux kernel (Azure) vulnerabilities
Ubuntu USN	USN-6866-3	Linux kernel (Azure) vulnerabilities
Ubuntu USN	USN-6895-1	Linux kernel vulnerabilities
Ubuntu USN	USN-6895-2	Linux kernel vulnerabilities
Ubuntu USN	USN-6895-3	Linux kernel vulnerabilities
Ubuntu USN	USN-6895-4	Linux kernel vulnerabilities
Ubuntu USN	USN-6900-1	Linux kernel vulnerabilities

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://lore.kernel.org/linux-cve-announce/2024040344-CVE-2024-26720-06fa@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2024-26720
https://www.cve.org/CVERecord?id=CVE-2024-26720

History

Dec 19, 2024 12:30 PM References updated View changes

Type	Values Removed	Values Added
References	https://git.kernel.org/stable/c/000099d71648504fb9c7a4616f92c2b70c3e44ec https://git.kernel.org/stable/c/145faa3d03688cbb7bbaaecbd84c01539852942c https://git.kernel.org/stable/c/16b1025eaa8fc223ab4273ece20d1c3a4211a95d https://git.kernel.org/stable/c/1f12e4b3284d6c863f272eb2de0d4248ed211cf4 https://git.kernel.org/stable/c/23a28f5f3f6ca1e4184bd0e9631cd0944cf1c807 https://git.kernel.org/stable/c/253f9ea7e8e53a5176bd80ceb174907b10724c1a https://git.kernel.org/stable/c/2820005edae13b140f2d54267d1bd6bb23915f59 https://git.kernel.org/stable/c/5099871b370335809c0fd1abad74d9c7c205d43f https://git.kernel.org/stable/c/65977bed167a92e87085e757fffa5798f7314c9f https://git.kernel.org/stable/c/81e7d2530d458548b90a5c5e76b77ad5e5d1c0df https://git.kernel.org/stable/c/9319b647902cbd5cc884ac08a8a6d54ce111fc78 https://git.kernel.org/stable/c/c593d26fb5d577ef31b6e49a31e08ae3ebc1bc1e https://git.kernel.org/stable/c/cbbe17a324437c0ff99881a3ee453da45b228a00 https://git.kernel.org/stable/c/ec18ec230301583395576915d274b407743d8f6c https://git.kernel.org/stable/c/f6620df12cb6bdcad671d269debbb23573502f9d

Dec 19, 2024 12:15 PM Title updated. Scoring metrics updated View changes

Type	Values Removed	Values Added
Title	mm/writeback: fix possible divide-by-zero in wb_dirty_limits(), again	kernel: mm/writeback: fix possible divide-by-zero in wb_dirty_limits(), again
Metrics	ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Dec 19, 2024 11:30 AM Description updated View changes

Type	Values Removed	Values Added
Description	In the Linux kernel, the following vulnerability has been resolved: mm/writeback: fix possible divide-by-zero in wb_dirty_limits(), again (struct dirty_throttle_control )->thresh is an unsigned long, but is passed as the u32 divisor argument to div_u64(). On architectures where unsigned long is 64 bytes, the argument will be implicitly truncated. Use div64_u64() instead of div_u64() so that the value used in the "is this a safe division" check is the same as the divisor. Also, remove redundant cast of the numerator to u64, as that should happen implicitly. This would be difficult to exploit in memcg domain, given the ratio-based arithmetic domain_drity_limits() uses, but is much easier in global writeback domain with a BDI_CAP_STRICTLIMIT-backing device, using e.g. vm.dirty_bytes=(1<<32)PAGE_SIZE so that dtc->thresh == (1<<32)	This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.

Nov 5, 2024 10:15 AM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Sep 24, 2024 11:15 AM Affected versions updated View changes

Type	Values Removed	Values Added
CPEs		cpe:/o:redhat:enterprise_linux:8

Sep 24, 2024 6:30 AM Affected versions updated View changes

Type	Values Removed	Values Added
CPEs		cpe:/a:redhat:enterprise_linux:8::nfv

Sep 11, 2024 6:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics	ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Sep 11, 2024 1:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Sep 11, 2024 11:00 AM First appearance in the feed. Affected versions updated. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Redhat enterprise Linux
CPEs		cpe:/a:redhat:enterprise_linux:9 cpe:/o:redhat:enterprise_linux:9
Vendors & Products		Redhat enterprise Linux