CVE-2026-74728xfs: handle NULL b_addr in xfs_buf_free
- —Not scoredno CVSS score yet
- 0.17%Exploitation in 30 daysEPSS · top 93% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Linux
- 7 days later
· 7 days later
Published
- 2 months later
· 2 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.17% · top 93% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected 5076a6040ca1613e616d84aecfaac5f932db84e0 – < 444ff50ece93060131ad84fbd3f378723d8ac243
- affected 5076a6040ca1613e616d84aecfaac5f932db84e0 – < ccf6738adcafa5ddbddc4e71b45d8a51b86643c7
- affected 5076a6040ca1613e616d84aecfaac5f932db84e0 – < 3aa0c1d23ee1b9d9b340fb2f4736536e1408d706
- affected 5076a6040ca1613e616d84aecfaac5f932db84e0 – < d852729c5f4f830fbe7413df032e29459b3daf83
- affected 6.9
- unaffected < 6.9
- unaffected 6.12.114 – ≤ 6.12.*
- unaffected 6.18.45 – ≤ 6.18.*
- unaffected 7.1.9 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References4
- https://git.kernel.org/stable/c/444ff50ece93060131ad84fbd3f378723d8ac243 (opens in a new tab)
- https://git.kernel.org/stable/c/ccf6738adcafa5ddbddc4e71b45d8a51b86643c7 (opens in a new tab)
- https://git.kernel.org/stable/c/3aa0c1d23ee1b9d9b340fb2f4736536e1408d706 (opens in a new tab)
- https://git.kernel.org/stable/c/d852729c5f4f830fbe7413df032e29459b3daf83 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-64415 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://cveledger.app/cve/CVE-2026-74728)Record last updated .