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CVE-2026-63800

9.8 critical SSVC exploitation: none Modified
NVD · CVE.org

In the Linux kernel, the following vulnerability has been resolved: pNFS: Fix use-after-free in pnfs_update_layout() When hitting the NFS_LAYOUT_RETURN branch in pnfs_update_layout(), the code calls pnfs_prepare_to_retry_layoutget(lo). If it succeeds, pnfs_put_layout_hdr(lo) is called before trace_pnfs_update_layout(), which still references 'lo'. This results in a use-after-free when the tracepoint accesses lo's fields. Fix this by moving the tracepoint call before pnfs_put_layout_hdr(lo).

Fix

Patch, vendor advisory and mitigation references on NVD 8

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 2

  1. StatusAnalyzed → ModifiedNVD modified 2026-10-19 20:19
  2. First seenCVSS 9.8 · linuxNVD modified 2026-10-16 16:18

Affected (CPE criteria) 6

  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.11:-:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.11:rc4:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.11:rc5:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.11:rc6:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.11:rc7:*:*:*:*:*:*

References 8