CVE-2026-74728
CVE CVE-2026-74728EUVD EUVD-2026-64415Published 2026-08-22T15:33:18.000Z
What the advisory describes
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.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux patch: 0; patch: 7.2; patch: 7.1.9; 5076a6040ca1613e616d84aecfaac5f932db84e0 <ccf6738adcafa5ddbddc4e71b45d8a51b86643c7; 6.9; patch: 6.18.45; 5076a6040ca1613e616d84aecfaac5f932db84e0 <d852729c5f4f830fbe7413df032e29459b3daf83; 5076a6040ca1613e616d84aecfaac5f932db84e0 <3aa0c1d23ee1b9d9b340fb2f4736536e1408d706
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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