What’s Vulnerable › Vulnerabilities

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

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-08-17

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 products

• Linux kernel: 4.12 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/07c05601a9a8e5d4481b2a4a16dc0e3c5bc63ad9
• https://git.kernel.org/stable/c/1679780f482feeb82acb5995587d4fb1d1fe82fd
• https://git.kernel.org/stable/c/18227a6bc98bd0ba96ed3ce9d5b28776a5a28dfc
• https://git.kernel.org/stable/c/36723b28e3293047f087f4501f1ef4ead418dd84
• https://git.kernel.org/stable/c/82fc886e244c76fadf05ef1958aaf8815478ccde
• https://git.kernel.org/stable/c/a72bbb43689591c9d36e3bb45c2d4e688cf92682
• https://git.kernel.org/stable/c/e3d325c0bdb7bc5d1b4cc8d8441d79794cd03729
• https://git.kernel.org/stable/c/fdf06a1b66ff39664b01c6bb6a2aa98d81e8ebe1

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