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CVE-2026-72033

CRITICALCVSS 9.8/10EPSS 0.22%

Last modified

CVE-2026-72033 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. EPSS estimates a 0.22% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
0.22%

12.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 480e3e532e31666a18520a7964bb4095d7a16b9a, < 1679780f482feeb82acb5995587d4fb1d1fe82fd; >= 480e3e532e31666a18520a7964bb4095d7a16b9a, < a72bbb43689591c9d36e3bb45c2d4e688cf92682; >= 480e3e532e31666a18520a7964bb4095d7a16b9a, < 36723b28e3293047f087f4501f1ef4ead418dd84; >= 480e3e532e31666a18520a7964bb4095d7a16b9a, < 07c05601a9a8e5d4481b2a4a16dc0e3c5bc63ad9; >= 480e3e532e31666a18520a7964bb4095d7a16b9a, < fdf06a1b66ff39664b01c6bb6a2aa98d81e8ebe1; >= 480e3e532e31666a18520a7964bb4095d7a16b9a, < 82fc886e244c76fadf05ef1958aaf8815478ccde; >= 480e3e532e31666a18520a7964bb4095d7a16b9a, < e3d325c0bdb7bc5d1b4cc8d8441d79794cd03729; >= 480e3e532e31666a18520a7964bb4095d7a16b9a, < 18227a6bc98bd0ba96ed3ce9d5b28776a5a28dfc
LinuxLinux4.12

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-72033?
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.
How severe is CVE-2026-72033?
CVE-2026-72033 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.22% probability of exploitation in the next 30 days.
How do I fix CVE-2026-72033?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST