In the Linux kernel, the following vulnerability has been resolved:
io_uring/kbuf: always use READ_ONCE() to read ring provided buffer lengths
Since the buffers are mapped from userspace, it is prudent to use READ_ONCE() to read the value into a local variable, and use that for any other actions taken. Having a stable read of the buffer length avoids worrying about it changing after checking, or being read multiple times.
Similarly, the buffer may well change in between it being picked and being committed. Ensure the looping for incremental ring buffer commit stops if it hits a zero sized buffer, as no further progress can be made at that point.
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade kernel6.12Upgrade perf6.12Upgrade kernel6.12-headersUpgrade bpftool6.12Upgrade kernel6.12-libbpf-debuginfoUpgrade bpftool6.12-debuginfoUpgrade kernel6.12-libbpf-develUpgrade kernel6.12-debuginfo-common-aarch64Upgrade kernel6.12-debuginfoUpgrade kernel6.12-libbpf-staticUpgrade kernel-livepatch-6.12.53-69.119Upgrade kernel6.12-develUpgrade kernel6.12-toolsUpgrade kernel6.12-libbpfUpgrade kernel6.12-tools-debuginfoUpgrade python3-perf6.12-debuginfoUpgrade kernel6.12-modules-extraUpgrade perf6.12-debuginfoUpgrade python3-perf6.12Upgrade kernel6.12-debuginfo-common-x86_64Upgrade kernel6.12-modules-extra-commonUpgrade kernel6.12-tools-devel | Oct 28, 2025 | Sep 16, 2025 |
| Debian | — | Upgrade linux | Jul 23, 2026 | Jul 23, 2026 |
| Suse | — | Upgrade kernel-default-livepatch-develUpgrade kernel-rt-optionalUpgrade kernel-default-baseUpgrade dtb-marvellUpgrade dtb-renesasUpgrade kselftests-kmp-defaultUpgrade gfs2-kmp-defaultUpgrade kernel-64kb-optionalUpgrade kernel-source-vanillaUpgrade kernel-64kb-extraUpgrade dtb-appleUpgrade reiserfs-kmp-defaultUpgrade kernel-rt-extraUpgrade dtb-broadcomUpgrade dlm-kmp-rtUpgrade dtb-armUpgrade dlm-kmp-defaultUpgrade cluster-md-kmp-64kbUpgrade dtb-nvidiaUpgrade dtb-allwinnerUpgrade dtb-hisiliconUpgrade dtb-amdUpgrade kernel-azureUpgrade kernel-kvmsmall-vdsoUpgrade dtb-socionextUpgrade kernel-64kb-develUpgrade kernel-docsUpgrade kernel-rt-livepatch-develUpgrade kernel-docs-htmlUpgrade kernel-defaultUpgrade ocfs2-kmp-defaultUpgrade ocfs2-kmp-64kbUpgrade kselftests-kmp-rtUpgrade dtb-sprdUpgrade gfs2-kmp-64kbUpgrade kernel-symsUpgrade kernel-64kbUpgrade dtb-rockchipUpgrade dtb-freescaleUpgrade kernel-zfcpdumpUpgrade kernel-rtUpgrade dtb-apmUpgrade dtb-qcomUpgrade kernel-rt-livepatchUpgrade kernel-kvmsmallUpgrade dtb-caviumUpgrade kernel-azure-develUpgrade kselftests-kmp-64kbUpgrade kernel-devel-azureUpgrade dtb-amazonUpgrade kernel-obs-buildUpgrade kernel-syms-azureUpgrade kernel-default-vdsoUpgrade kernel-macrosUpgrade dtb-mediatekUpgrade ocfs2-kmp-rtUpgrade kernel-develUpgrade dtb-exynosUpgrade dtb-alteraUpgrade cluster-md-kmp-defaultUpgrade kernel-rt-vdsoUpgrade kernel-source-azureUpgrade kernel-sourceUpgrade kernel-default-develUpgrade kernel-kvmsmall-develUpgrade kernel-default-livepatchUpgrade cluster-md-kmp-rtUpgrade kernel-rt-develUpgrade kernel-default-extraUpgrade dtb-lgUpgrade dtb-amlogicUpgrade kernel-default-optionalUpgrade kernel-obs-qaUpgrade gfs2-kmp-rtUpgrade dtb-xilinxUpgrade dlm-kmp-64kb | Dec 5, 2025 | Oct 15, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jul 17, 2026 | Sep 16, 2025 |
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