CVE-2026-74728
- Source
- https://cve.org/CVERecord?id=CVE-2026-74728
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74728.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-74728
- Downstream
- Published
- 2026-08-22T15:33:18Z
- Modified
- 2026-08-24T11:47:22Z
- Summary
- xfs: handle NULL b_addr in xfs_buf_free
- Details
-
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.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74728.json" }- References
-
- https://git.kernel.org/stable/c/3aa0c1d23ee1b9d9b340fb2f4736536e1408d706
- https://git.kernel.org/stable/c/ccf6738adcafa5ddbddc4e71b45d8a51b86643c7
- https://git.kernel.org/stable/c/d852729c5f4f830fbe7413df032e29459b3daf83
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74728.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-74728
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git