CVE-2026-74728

In the Linux kernel, the following vulnerability has been resolved: xfs: handle NULL b_addr in xfs_buf_free When xfs_buf_alloc_backing_mem() fails, xfs_buf_free() is called with bp->b_addr still NULL. The code falls through to the folio_put path which calls virt_to_folio(NULL), dereferencing an invalid address and causing a kernel crash. Call Trace: xfs_buf_free+0x25f/0x510 xfs_buf_alloc+0xc98/0x19b0 xfs_buf_find_insert+0x55/0x14d0 xfs_buf_get_map+0x122b/0x17c0 xfbtree_init_leaf_block+0x11c/0x4a0 xfbtree_init+0x1bb/0x460 xrep_rmap_setup_scan+0x100/0x1f0 xrep_rmapbt+0x41/0xc0 Fix this by skipping folio_put() when bp->b_addr is NULL.

Published 22 Aug 2026, 16:16 UTC Last modified 22 Aug 2026, 16:16 UTC

Attack profile

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Attack vector Not assessed

Attack complexity Not assessed

Privileges required Not assessed

User interaction Not assessed

Scope Not assessed

Confidentiality Not assessed

Integrity Not assessed

Availability Not assessed

Affected products

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NVD has not published structured affected-product data for this record.

Weakness classification

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Weakness classification is still awaiting analysis.

Source references

External advisories, patches and technical reports attached to this CVE record.

NVD National Vulnerability Database recordnvd.nist.gov 01 Technical reference 416baaa9-dc9f-4396-8d5f-8c081fb06d67 02 Technical reference 416baaa9-dc9f-4396-8d5f-8c081fb06d67 03 Technical reference 416baaa9-dc9f-4396-8d5f-8c081fb06d67