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CVE-2026-98872

unscored Published
NVD · CVE.org

In the Linux kernel, the following vulnerability has been resolved: freevxfs: don't BUG() on unknown typed-extent type vxfs_bmap_typed() handles four typed-extent types and calls BUG() in its default case, so an on-disk typed extent with any other type value crashes the kernel. It is reachable from ioctl(FIBMAP) on a regular file: kernel BUG at fs/freevxfs/vxfs_bmap.c:230! RIP: vxfs_bmap_typed fs/freevxfs/vxfs_bmap.c:230 [inline] vxfs_bmap1+0x128a/0x12d0 fs/freevxfs/vxfs_bmap.c:257 Replace the BUG() with WARN_ON_ONCE() and return 0 -- the value vxfs_bmap_typed() already returns on failure (and from the DEV4 case above); vxfs_getblk() maps 0 to -EIO, so the ioctl fails cleanly.

Fix

Microsoft's update · Moderate

  • Release Notes — azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 · build 6.6.159.1-1

From the 2026-Oct release note of Microsoft's Security Update Guide, revised 2026-10-31.

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

Change history 5

  1. StatusReceived → PublishedNVD modified 2026-10-26 06:55
  2. StatusPublished → ReceivedNVD modified 2026-10-26 07:17
  3. StatusReceived → PublishedNVD modified 2026-10-23 11:37
  4. StatusPublished → ReceivedNVD modified 2026-10-23 12:18
  5. First seenunscored · linuxNVD modified 2026-10-23 11:37

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 7