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 bpftool6.12Upgrade bpftool6.12-debuginfoUpgrade kernel6.12-libbpf-debuginfoUpgrade kernel6.12Upgrade kernel6.12-headersUpgrade perf6.12Upgrade kernel6.12-libbpf-develUpgrade python3-perf6.12Upgrade kernel6.12-tools-debuginfoUpgrade kernel6.12-toolsUpgrade kernel-livepatch-6.12.53-69.119Upgrade kernel6.12-modules-extra-commonUpgrade kernel6.12-debuginfo-common-x86_64Upgrade python3-perf6.12-debuginfoUpgrade kernel6.12-libbpfUpgrade kernel6.12-debuginfo-common-aarch64Upgrade kernel6.12-tools-develUpgrade kernel6.12-debuginfoUpgrade kernel6.12-develUpgrade kernel6.12-modules-extraUpgrade perf6.12-debuginfoUpgrade kernel6.12-libbpf-static | Oct 28, 2025 | Sep 16, 2025 |
| Debian | — | Upgrade linux | Jul 23, 2026 | Jul 23, 2026 |
| Suse | — | Upgrade dtb-allwinnerUpgrade dtb-amdUpgrade reiserfs-kmp-defaultUpgrade dtb-armUpgrade kselftests-kmp-defaultUpgrade ocfs2-kmp-64kbUpgrade kernel-azureUpgrade kernel-kvmsmall-vdsoUpgrade cluster-md-kmp-64kbUpgrade kernel-64kb-extraUpgrade kernel-64kb-optionalUpgrade dtb-broadcomUpgrade kernel-rt-extraUpgrade dtb-nvidiaUpgrade dlm-kmp-rtUpgrade dtb-socionextUpgrade kselftests-kmp-rtUpgrade kernel-defaultUpgrade dtb-marvellUpgrade kernel-64kb-develUpgrade kernel-docsUpgrade dlm-kmp-defaultUpgrade dtb-appleUpgrade dtb-sprdUpgrade kernel-rt-livepatch-develUpgrade kernel-docs-htmlUpgrade ocfs2-kmp-defaultUpgrade dtb-renesasUpgrade gfs2-kmp-defaultUpgrade kernel-source-vanillaUpgrade dtb-hisiliconUpgrade kernel-default-livepatch-develUpgrade kernel-rt-optionalUpgrade kernel-default-baseUpgrade kernel-source-azureUpgrade kernel-default-extraUpgrade dtb-qcomUpgrade kernel-default-optionalUpgrade dtb-mediatekUpgrade cluster-md-kmp-rtUpgrade kernel-sourceUpgrade kernel-default-develUpgrade kernel-64kbUpgrade kernel-default-livepatchUpgrade kernel-rt-develUpgrade kernel-kvmsmall-develUpgrade cluster-md-kmp-defaultUpgrade dtb-exynosUpgrade ocfs2-kmp-rtUpgrade kernel-develUpgrade dtb-alteraUpgrade kernel-rt-vdsoUpgrade kernel-syms-azureUpgrade kernel-obs-buildUpgrade kernel-devel-azureUpgrade kernel-default-vdsoUpgrade dtb-amazonUpgrade kernel-macrosUpgrade dtb-caviumUpgrade kernel-rt-livepatchUpgrade kernel-kvmsmallUpgrade kernel-obs-qaUpgrade kernel-azure-develUpgrade gfs2-kmp-rtUpgrade dtb-xilinxUpgrade dlm-kmp-64kbUpgrade kselftests-kmp-64kbUpgrade dtb-lgUpgrade dtb-apmUpgrade dtb-amlogicUpgrade kernel-rtUpgrade kernel-zfcpdumpUpgrade kernel-symsUpgrade dtb-rockchipUpgrade dtb-freescaleUpgrade gfs2-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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