Vulnerability · Published Jul 19, 2026 · Assigned by Linux

CVE-2026-64018net: mana: validate rx_req_idx to prevent out-of-bounds array access

Critical 9.3

In plain English

A critical-severity out-of-bounds read in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 4% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.3Critical
Exploit odds (30 days)0.1%top 96.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: net: mana: validate rx_req_idx to prevent out-of-bounds array access In mana_hwc_rx_event_handler(), rx_req_idx is derived from sge->address in DMA-coherent memory. In Confidential VMs (SEV-SNP/TDX), this memory is shared unencrypted and HW can modify WQE contents at any time. No bounds check exists on rx_req_idx, which can lead to an out-of-bounds access into reqs[]. Add bounds check on rx_req_idx in mana_hwc_rx_event_handler() before using it to index the reqs[] array.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8bpftool4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:10kernel6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-64k6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-64k5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-64k-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-64k-core5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-64k-debug6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-64k-debug5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-64k-debug-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-64k-debug-core5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-64k-debug-devel6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-64k-debug-devel5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-64k-debug-devel-matched6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-64k-debug-devel-matched5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-64k-debug-modules6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-64k-debug-modules5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-64k-debug-modules-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-64k-debug-modules-core5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-64k-debug-modules-extra6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-64k-debug-modules-extra5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-64k-devel6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-64k-devel5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-64k-devel-matched6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-64k-devel-matched5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-64k-modules6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-64k-modules5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-64k-modules-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-64k-modules-core5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-64k-modules-extra6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-64k-modules-extra5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-abi-stablelists6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-abi-stablelists4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-abi-stablelists5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-core4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-core5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-cross-headers6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-cross-headers4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-cross-headers5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-debug6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-debug4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-debug5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-debug-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-debug-core4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-debug-core5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-debug-devel6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-debug-devel4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-debug-devel5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-debug-devel-matched6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-debug-devel-matched5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-debug-modules6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-debug-modules4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-debug-modules5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-debug-modules-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-debug-modules-core5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-debug-modules-extra6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-debug-modules-extra4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-debug-modules-extra5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-debug-uki-virt6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-debug-uki-virt5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-devel6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-devel4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-devel5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-devel-matched6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-devel-matched5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-doc6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-doc4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-doc5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-headers6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-headers4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-headers5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-modules6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-modules4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-modules5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-modules-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-modules-core5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-modules-extra6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-modules-extra4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-modules-extra5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-modules-extra-matched6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-rt6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-rt4.18.0-553.159.1.rt7.500.el8_10ALSA-2026:63013
AlmaLinux:9kernel-rt5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-rt-64k6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-rt-64k5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-rt-64k-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-rt-64k-core5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-rt-64k-debug6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-rt-64k-debug5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-rt-64k-debug-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-rt-64k-debug-core5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-rt-64k-debug-devel6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-rt-64k-debug-devel5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-rt-64k-debug-modules6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-rt-64k-debug-modules5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-rt-64k-debug-modules-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-rt-64k-debug-modules-core5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-rt-64k-debug-modules-extra6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-rt-64k-debug-modules-extra5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-rt-64k-devel6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-rt-64k-devel5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-rt-64k-modules6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-rt-64k-modules5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-rt-64k-modules-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-rt-64k-modules-core5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-rt-64k-modules-extra6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-rt-64k-modules-extra5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-rt-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-rt-core4.18.0-553.159.1.rt7.500.el8_10ALSA-2026:63013
AlmaLinux:9kernel-rt-core5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-rt-debug6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-rt-debug4.18.0-553.159.1.rt7.500.el8_10ALSA-2026:63013
AlmaLinux:9kernel-rt-debug5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-rt-debug-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-rt-debug-core4.18.0-553.159.1.rt7.500.el8_10ALSA-2026:63013
AlmaLinux:9kernel-rt-debug-core5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-rt-debug-devel6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-rt-debug-devel4.18.0-553.159.1.rt7.500.el8_10ALSA-2026:63013
AlmaLinux:9kernel-rt-debug-devel5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-rt-debug-modules6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-rt-debug-modules4.18.0-553.159.1.rt7.500.el8_10ALSA-2026:63013
AlmaLinux:9kernel-rt-debug-modules5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-rt-debug-modules-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-rt-debug-modules-core5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-rt-debug-modules-extra6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-rt-debug-modules-extra4.18.0-553.159.1.rt7.500.el8_10ALSA-2026:63013
AlmaLinux:9kernel-rt-debug-modules-extra5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-rt-devel6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-rt-devel4.18.0-553.159.1.rt7.500.el8_10ALSA-2026:63013
AlmaLinux:9kernel-rt-devel5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-rt-modules6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-rt-modules4.18.0-553.159.1.rt7.500.el8_10ALSA-2026:63013
AlmaLinux:9kernel-rt-modules5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-rt-modules-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-rt-modules-core5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-rt-modules-extra6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-rt-modules-extra4.18.0-553.159.1.rt7.500.el8_10ALSA-2026:63013
AlmaLinux:9kernel-rt-modules-extra5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-tools6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-tools4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-tools5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-tools-libs6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-tools-libs4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-tools-libs5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-tools-libs-devel6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-tools-libs-devel4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-tools-libs-devel5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-uki-virt6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-uki-virt5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-uki-virt-addons6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-uki-virt-addons5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-zfcpdump6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-zfcpdump4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-zfcpdump5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-zfcpdump-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-zfcpdump-core4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-zfcpdump-core5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-zfcpdump-devel6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-zfcpdump-devel4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-zfcpdump-devel5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-zfcpdump-devel-matched6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-zfcpdump-devel-matched5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-zfcpdump-modules6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-zfcpdump-modules4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-zfcpdump-modules5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-zfcpdump-modules-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9kernel-zfcpdump-modules-core5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10kernel-zfcpdump-modules-extra6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8kernel-zfcpdump-modules-extra4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9kernel-zfcpdump-modules-extra5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10libperf6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9libperf5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10perf6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8perf4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9perf5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10python3-perf6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:8python3-perf4.18.0-553.159.1.el8_10ALSA-2026:63014
AlmaLinux:9python3-perf5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10rtla6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9rtla5.14.0-687.44.1.el9_8ALSA-2026:63129
AlmaLinux:10rv6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:9rv5.14.0-687.44.1.el9_8ALSA-2026:63129
Debian:12linux6.1.176-1DEBIAN-CVE-2026-64018
Debian:13linux6.12.94-1DEBIAN-CVE-2026-64018
Debian:14linux7.0.12-1DEBIAN-CVE-2026-64018
Rocky Linux:10kernel0:6.12.0-211.50.1.el10_2RLSA-2026:61887
Rocky Linux:8kernel0:4.18.0-553.159.1.el8_10RLSA-2026:63014
Rocky Linux:9kernel0:5.14.0-687.44.1.el9_8RLSA-2026:63129
Rocky Linux:8kernel-rt0:4.18.0-553.159.1.rt7.500.el8_10RLSA-2026:63013
Ubuntu:22.04:LTSlinux5.15.0-186.196UBUNTU-CVE-2026-64018
Ubuntu:24.04:LTSlinux6.8.0-139.139USN-8729-1
Ubuntu:24.04:LTSlinux6.8.0-139.139UBUNTU-CVE-2026-64018
Ubuntu:26.04:LTSlinux7.0.0-28.28UBUNTU-CVE-2026-64018
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-64018
Ubuntu:22.04:LTSlinux-aws5.15.0-1112.119UBUNTU-CVE-2026-64018
Ubuntu:24.04:LTSlinux-aws6.8.0-1064.67USN-8729-6
Ubuntu:24.04:LTSlinux-aws6.8.0-1064.67UBUNTU-CVE-2026-64018
Ubuntu:26.04:LTSlinux-aws7.0.0-1009.9UBUNTU-CVE-2026-64018

Affected products (as reported)

VendorProductVersions
Linux Linux ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f – before 5ddc715324badd7f2641bc177db1d027b402adaeca9c54d2d6a5ab2430c4eda364c77125d62e5e0f – before ff1d5af207bcea857d45fe81505f1bc4b29eaef0ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f – before 01f7f893d5e1baae995beeb86cd0f3e6bb2a3b01ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f – before 763a372d344fb12fae566d36ddb46e92454ad58cca9c54d2d6a5ab2430c4eda364c77125d62e5e0f – before fa627a5eaa83fc0261f44ef3769693b886ca6e27ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f – before 355e9f2b2a7887ca38100127989af3e422ba71d0ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f – before b809d0409991b75a6cff846a5ac27c3062953f84
Linux Linux 5.13

Weakness: CWE-125 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

References