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Vulnerability · Published Aug 15, 2026 · Assigned by Linux

CVE-2026-72033orangefs: keep the readdir entry size 64-bit in fill_from_part()

Critical 9.8

In plain English

A critical-severity security flaw 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 0.8% (higher than 57% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.8%top 43.5% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: orangefs: keep the readdir entry size 64-bit in fill_from_part() fill_from_part() computes the size of a directory entry in size_t but stores it in a __u32. An entry length near U32_MAX wraps it to a small value, bypasses the bounds check, and is then used to index the entry, reading far past the directory part -- an out-of-bounds read that oopses the kernel. Compute the size as a u64 so it cannot truncate; the bounds check then rejects the entry. The trailer is supplied by the userspace client.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.180-1DEBIAN-CVE-2026-72033
Debian:13linux6.12.100-1DEBIAN-CVE-2026-72033
Debian:14linux7.1.5-1DEBIAN-CVE-2026-72033
Ubuntu:22.04:LTSlinux5.15.0-198.208UBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux6.8.0-147.147UBUNTU-CVE-2026-72033
Ubuntu:26.04:LTSlinux7.0.0-34.34UBUNTU-CVE-2026-72033
Ubuntu:26.04:LTSlinux7.0.0-34.34USN-8816-1
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-aws5.15.0-1117.124UBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-aws6.8.0-1067.70UBUNTU-CVE-2026-72033
Ubuntu:26.04:LTSlinux-aws7.0.0-1013.13USN-8816-1
Ubuntu:26.04:LTSlinux-aws7.0.0-1013.13UBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-aws-7.07.0.0-1013.13~24.04.1UBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-aws-7.07.0.0-1013.13~24.04.1USN-8816-1
Ubuntu:22.04:LTSlinux-azure5.15.0-1123.132UBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-azure6.8.0-1071.79UBUNTU-CVE-2026-72033
Ubuntu:26.04:LTSlinux-azure7.0.0-1017.17UBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-azure-7.07.0.0-1017.17~24.04.1UBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1122.131UBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-azure-fde6.8.0-1069.76UBUNTU-CVE-2026-72033
Ubuntu:26.04:LTSlinux-azure-fde7.0.0-1016.16UBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-azure-fde-7.07.0.0-1016.16~24.04.1UBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-gcp5.15.0-1118.128UBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-gcp6.8.0-1071.79UBUNTU-CVE-2026-72033
Ubuntu:26.04:LTSlinux-gcp7.0.0-1013.13UBUNTU-CVE-2026-72033
Ubuntu:26.04:LTSlinux-gcp7.0.0-1013.13USN-8816-2
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-gcp-7.07.0.0-1013.13~24.04.1USN-8816-2
Ubuntu:24.04:LTSlinux-gcp-7.07.0.0-1013.13~24.04.1UBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-gke5.15.0-1113.119UBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-gke6.8.0-1066.74UBUNTU-CVE-2026-72033
Ubuntu:26.04:LTSlinux-gke7.0.0-1007.8UBUNTU-CVE-2026-72033
Ubuntu:26.04:LTSlinux-gke7.0.0-1007.8USN-8816-4
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1100.108UBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1052.56UBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-hwe-7.07.0.0-34.34~24.04.1USN-8816-1
Ubuntu:24.04:LTSlinux-hwe-7.07.0.0-34.34~24.04.1UBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-ibm5.15.0-1111.115UBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-ibm6.8.0-1067.68UBUNTU-CVE-2026-72033
Ubuntu:26.04:LTSlinux-ibm7.0.0-1014.14UBUNTU-CVE-2026-72033
Ubuntu:26.04:LTSlinux-ibm7.0.0-1014.14USN-8816-1
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1112.118UBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-kvm5.15.0-1109.114UBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-195.205UBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-147.147.1UBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1112.113UBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-72033
Ubuntu:26.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-nvidia-7.07.0.0-1024.25~24.04.1UBUNTU-CVE-2026-72033
Ubuntu:26.04:LTSlinux-nvidia-bos7.0.0-2022.23UBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1070.72UBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1035.38UBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1059.59UBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-72033
Ubuntu:26.04:LTSlinux-oem-7.07.0.0-1014.14UBUNTU-CVE-2026-72033
Ubuntu:26.04:LTSlinux-oem-7.07.0.0-1014.14USN-8816-2
Ubuntu:22.04:LTSlinux-oracle5.15.0-1114.120UBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-oracle6.8.0-1064.67UBUNTU-CVE-2026-72033
Ubuntu:26.04:LTSlinux-oracle7.0.0-1012.12USN-8816-1
Ubuntu:26.04:LTSlinux-oracle7.0.0-1012.12UBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-oracle-7.07.0.0-1012.12~24.04.1USN-8816-3
Ubuntu:24.04:LTSlinux-oracle-7.07.0.0-1012.12~24.04.1UBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-72033
Ubuntu:26.04:LTSlinux-raspi7.0.0-1020.20UBUNTU-CVE-2026-72033
Ubuntu:26.04:LTSlinux-raspi7.0.0-1020.20USN-8816-1
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-72033
Ubuntu:26.04:LTSlinux-realtime7.0.0-34.34.1UBUNTU-CVE-2026-72033
Ubuntu:26.04:LTSlinux-realtime7.0.0-34.34.1USN-8816-1
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-72033
Ubuntu:26.04:LTSlinux-riscv7.0.0-34.34.1UBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-riscv-7.07.0.0-34.34.1~24.04.1UBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-vmware6.8.0-1008.8UBUNTU-CVE-2026-72033
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2026-72033
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1080.84UBUNTU-CVE-2026-72033

Affected products (as reported)

VendorProductVersions
Linux Linux 480e3e532e31666a18520a7964bb4095d7a16b9a – before 1679780f482feeb82acb5995587d4fb1d1fe82fd480e3e532e31666a18520a7964bb4095d7a16b9a – before a72bbb43689591c9d36e3bb45c2d4e688cf92682480e3e532e31666a18520a7964bb4095d7a16b9a – before 36723b28e3293047f087f4501f1ef4ead418dd84480e3e532e31666a18520a7964bb4095d7a16b9a – before 07c05601a9a8e5d4481b2a4a16dc0e3c5bc63ad9480e3e532e31666a18520a7964bb4095d7a16b9a – before fdf06a1b66ff39664b01c6bb6a2aa98d81e8ebe1480e3e532e31666a18520a7964bb4095d7a16b9a – before 82fc886e244c76fadf05ef1958aaf8815478ccde480e3e532e31666a18520a7964bb4095d7a16b9a – before e3d325c0bdb7bc5d1b4cc8d8441d79794cd03729480e3e532e31666a18520a7964bb4095d7a16b9a – before 18227a6bc98bd0ba96ed3ce9d5b28776a5a28dfc
Linux Linux 4.12

References