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CVE-2026-89498

UnknownEPSS 0.17%

Last modified

CVE-2026-89498 is a vulnerability of currently unknown severity. In the Linux kernel, the following vulnerability has been resolved: orangefs: fix double-free of trailer_buf on readdir copy failure On a readdir downcall, orangefs_devreq_write_iter() frees op->downcall.trailer_buf with vfree() when copy_from_iter_full() fails, but does not clear the pointer before goto Efault. The waiter in do_readdir() is then woken with a negative status and frees the same pointer again on its r < 0 path, causing a deterministic double-free. A client holding /dev/pvfs2-req triggers it by sending a readdir downcall whose declared trailer_size exceeds the bytes it supplies. Clear the pointer after freeing so the readdir-side vfree() becomes a no-op.. EPSS estimates a 0.17% chance of exploitation in the next 30 days.

Description

In the Linux kernel, the following vulnerability has been resolved: orangefs: fix double-free of trailer_buf on readdir copy failure On a readdir downcall, orangefs_devreq_write_iter() frees op->downcall.trailer_buf with vfree() when copy_from_iter_full() fails, but does not clear the pointer before goto Efault. The waiter in do_readdir() is then woken with a negative status and frees the same pointer again on its r < 0 path, causing a deterministic double-free. A client holding /dev/pvfs2-req triggers it by sending a readdir downcall whose declared trailer_size exceeds the bytes it supplies. Clear the pointer after freeing so the readdir-side vfree() becomes a no-op.

Metrics

EPSS Probability
0.17%

6.4th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

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

VendorProductVersions
LinuxLinux>= 382f4581e67f57209c7aa67e39f26ba076306a2e, < 712c4235fcc73c11a2f1d59a499d489e49c374a4; >= 382f4581e67f57209c7aa67e39f26ba076306a2e, < 433c2e470053cc9c712314d3d8c3dfbc862d68eb; >= 382f4581e67f57209c7aa67e39f26ba076306a2e, < 6e5924644ef4bce06a3cbb7cb841a8bbfdfc03ad; >= 382f4581e67f57209c7aa67e39f26ba076306a2e, < 9c9eacc47c618ed6d7d35fe75a40d294c8cdbffa; >= 382f4581e67f57209c7aa67e39f26ba076306a2e, < 2f5454a25127854c232fde5d1d65d16fbcd42d43; >= 382f4581e67f57209c7aa67e39f26ba076306a2e, < f796f38a324e89547738f4b70cc33be5be2bc6da; >= 382f4581e67f57209c7aa67e39f26ba076306a2e, < 519f4146b8b8c5f20c2ad01913acd6df2df8fc8e; >= 382f4581e67f57209c7aa67e39f26ba076306a2e, < f574296be7f46eb60beca851240b526df232f480
LinuxLinux4.12

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-89498?
In the Linux kernel, the following vulnerability has been resolved: orangefs: fix double-free of trailer_buf on readdir copy failure On a readdir downcall, orangefs_devreq_write_iter() frees op->downcall.trailer_buf with vfree() when copy_from_iter_full() fails, but does not clear the pointer before goto Efault. The waiter in do_readdir() is then woken with a negative status and frees the same pointer again on its r < 0 path, causing a deterministic double-free. A client holding /dev/pvfs2-req triggers it by sending a readdir downcall whose declared trailer_size exceeds the bytes it supplies. Clear the pointer after freeing so the readdir-side vfree() becomes a no-op.
How severe is CVE-2026-89498?
Severity scoring for CVE-2026-89498 is pending analysis. The EPSS model estimates a 0.17% probability of exploitation in the next 30 days.
How do I fix CVE-2026-89498?
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