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kernel: ext4: fix off-by-one error in do_split

🗓️ 05 Aug 2025 18:01:14Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 3 Views

Fix off-by-one error in do_split to prevent use-after-free in ext4_insert_dentry.

Related
Packages
Refs
ReporterTitlePublishedViews
Family
nessus
Tenable Nessus		Amazon Linux 2023 : bpftool, kernel, kernel-devel (ALAS2023-2025-1050)
10 Jul 202500:00
–nessus
nessus
Tenable Nessus		Amazon Linux 2023 : bpftool, kernel6.12, kernel6.12-modules-extra (ALAS2023-2025-995)
12 Jun 202500:00
–nessus
nessus
Tenable Nessus		Amazon Linux 2 : kernel, --advisory ALAS2-2025-2944 (ALAS-2025-2944)
31 Jul 202500:00
–nessus
nessus
Tenable Nessus		Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.10-2025-094 (ALASKERNEL-5.10-2025-094)
9 Jun 202500:00
–nessus
nessus
Tenable Nessus		Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.15-2025-073 (ALASKERNEL-5.15-2025-073)
9 Jun 202500:00
–nessus
nessus
Tenable Nessus		Amazon Linux 2 : kernel (ALASKERNEL-5.15-2025-079)
10 Jul 202500:00
–nessus
nessus
Tenable Nessus		Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.4-2025-102 (ALASKERNEL-5.4-2025-102)
29 May 202500:00
–nessus
nessus
Tenable Nessus		AlmaLinux 8 : kernel (ALSA-2025:11298)
16 Jul 202500:00
–nessus
nessus
Tenable Nessus		AlmaLinux 8 : kernel-rt (ALSA-2025:11299)
16 Jul 202500:00
–nessus
nessus
Tenable Nessus		AlmaLinux 9 : kernel (ALSA-2025:9302)
3 Jul 202500:00
–nessus
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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8.8ppc64lebpftool4.18.0-477.104.1.el8_8bpftool-4.18.0-477.104.1.el8_8.ppc64le.rpm
Red Hat Enterprise Linux8.8x86_64bpftool4.18.0-477.104.1.el8_8bpftool-4.18.0-477.104.1.el8_8.x86_64.rpm
Red Hat Enterprise Linux8.8ppc64lebpftool-debuginfo4.18.0-477.104.1.el8_8bpftool-debuginfo-4.18.0-477.104.1.el8_8.ppc64le.rpm
Red Hat Enterprise Linux8.8x86_64bpftool-debuginfo4.18.0-477.104.1.el8_8bpftool-debuginfo-4.18.0-477.104.1.el8_8.x86_64.rpm
Red Hat Enterprise Linux8.8ppc64lekernel4.18.0-477.104.1.el8_8kernel-4.18.0-477.104.1.el8_8.ppc64le.rpm
Red Hat Enterprise Linux8.8x86_64kernel4.18.0-477.104.1.el8_8kernel-4.18.0-477.104.1.el8_8.x86_64.rpm
Red Hat Enterprise Linux8.8noarchkernel-abi-stablelists4.18.0-477.104.1.el8_8kernel-abi-stablelists-4.18.0-477.104.1.el8_8.noarch.rpm
Red Hat Enterprise Linux8.8ppc64lekernel-core4.18.0-477.104.1.el8_8kernel-core-4.18.0-477.104.1.el8_8.ppc64le.rpm
Red Hat Enterprise Linux8.8x86_64kernel-core4.18.0-477.104.1.el8_8kernel-core-4.18.0-477.104.1.el8_8.x86_64.rpm
Red Hat Enterprise Linux8.8ppc64lekernel-debug4.18.0-477.104.1.el8_8kernel-debug-4.18.0-477.104.1.el8_8.ppc64le.rpm
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30 Jul 2026 09:17Current
6.5Medium risk
Vulners AI Score6.5
CVSS 3.15.5 - 7.8
EPSS0.0019
SSVC
CWE-416
ext4do_splituse-after-freeout-of-boundsext4_insert_dentrynameisyzkaller
3