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CVE-2026-89497: orangefs: skip leading spaces before parsing client debug masks

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-11 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: orangefs: skip leading spaces before parsing client debug masks orangefs_prepare_cdm_array() sizes each client debug keyword buffer with strcspn(cds_head, " "), but then parses the keyword with %s. The %s conversion skips leading whitespace, while strcspn() does not. If a client debug entry starts with a space, the allocation can be sized for an empty keyword while sscanf() copies the following non-empty token. This can write past the end of the allocated keyword buffer. Skip leading spaces before computing the keyword length so the allocation matches the string parsed by sscanf().

Affected products

• Linux kernel: 4.6 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0ef38d53bca5ea1375fea0d3d11e9727df064b85
• https://git.kernel.org/stable/c/116d14f29a0524853c9316f32a2ac06cff5d4bf6
• https://git.kernel.org/stable/c/15d79c806231e62a7b746d3b42626810004e1b27
• https://git.kernel.org/stable/c/173bfd69696815bcf1c052f61cb69c26cca4e443
• https://git.kernel.org/stable/c/1774c5b3713add32fe15ab0d3db4b73355f94e35
• https://git.kernel.org/stable/c/995f4d05589f87452a56672270af28918c8939c3
• https://git.kernel.org/stable/c/ce748ae1181d0daf5dd0d2d906d5c1cc328c153b
• https://git.kernel.org/stable/c/d410cd5303ec59c7cf23dd61423752ce8e9ecb59

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