CVE-2026-89499

CVE-2026-89499 affects the Linux kernel ring-buffer component. When the remote swap_reader_page callback returns -EBUSY (e.g., during an event storm on a small buffer), __rb_get_reader_page_from_remote() incorrectly continues with an unchanged reader ID and rearranges the local page list as thoug...

CVE-2026-89499 ring-buffer: Stop remote reader update when page swap fails

In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Stop remote reader update when page swap fails The remote swapreaderpage callback can return -EBUSY when the writer moves the head before the remote catches it, particularly during an event storm on a small buffer...

EUVD-2026-76405

In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Stop remote reader update when page swap fails The remote swapreaderpage callback can return -EBUSY when the writer moves the head before the remote catches it, particularly during an event storm on a small buffer...

CVE-2026-89499

In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Stop remote reader update when page swap fails The remote swapreaderpage callback can return -EBUSY when the writer moves the head before the remote catches it, particularly during an event storm on a small buffer...

CVE-2026-89499 ring-buffer: Stop remote reader update when page swap fails

In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Stop remote reader update when page swap fails The remote swapreaderpage callback can return -EBUSY when the writer moves the head before the remote catches it, particularly during an event storm on a small buffer...

CVE-2026-89503: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Fix subbuf resize race with ringbufferallocreadpage ringbufferallocreadpage is racy with ringbuffersubbuforderset, it can allocate a reader page with an outdated order. This isn't a big issue, the user can still...

CVE-2026-89500: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Make cpubuffer::freepage a bufferdatareadpage Discarding a cached reader page after a concurrent ring buffer resize uses the new global subbuforder for the freepages call. This mismatched order may crashes the kernel...

PT-2026-90418

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the nfsd component where the nfsd fh verify and nfsd fh verify err tracepoints incorrectly size the server sockaddr slot using xpt remotelen while filling it from xpt...

PT-2026-90217

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A race condition exists in the ring-buffer component. The ring buffer subbuf order set function can clear cpu buffer-free page without proper synchronization. To prevent races with ring...

PT-2026-90219

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A race condition exists between the ring buffer alloc read page and ring buffer subbuf order set functions. This occurs when the subbuf order value changes during the execution of ring...

CVE-2026-89501: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Hold cpubuffer::lock when resizing a subbuf Because, ringbuffersubbuforderset can clear cpubuffer-freepage, hold cpubuffer-lock to prevent races with ringbufferallocreadpage and ringbufferfreereadpage...

CVE-2026-89502: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Free cpubuffer::freepage with subbuforder When sub-buffers use an order greater than 0, cpubuffer-freepage is allocated with subbuforder. Use the correct order for cpubuffer-freepage...

PT-2026-90464

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the tracing component where the simple ring buffer swap reader page function incorrectly handles retry exhaustion during a reader page swap. The function uses a retry...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-107324)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-107324 advisory. In the Linux kernel, the following vulnerability has been resolved: iouring: lock overflowing for IOPOLL syzbot reports an issue with overflow filling for IOPOLL:...

PT-2026-90218

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the ring-buffer component where cpu buffer::free page is allocated using subbuf order when sub-buffers use an order greater than 0. This requires the use of the correc...

PT-2026-90463

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A use-after-free issue exists in the tracing component when reading from trace pipe during a sub-buffer order change. Writing to buffer subbuf size kb triggers the ring buffer subbuf ord...

CVE-2026-89499: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Stop remote reader update when page swap fails The remote swapreaderpage callback can return -EBUSY when the writer moves the head before the remote catches it, particularly during an event storm on a small buffer...

PT-2026-90215

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the ring-buffer page swap mechanism where the swap reader page callback may return -EBUSY if the writer moves the head before the remote reader catches it, which is...

CVE-2026-89748: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: tracing: Fix retry exhaustion in simple ring buffer reader swap simpleringbufferswapreaderpage starts with retry set to 8 and post-decrements it only after a failed link replacement. On the final attempt, a successful replacement...

PT-2026-90487

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A race condition exists in the ring-buffer component where trace buffer subbuf size is read without locking in the ring buffer read page and ring buffer read start functions. This occurs...