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.
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade kernel6.18-modules-extra-commonUpgrade kernel6.18Upgrade kernel6.18-toolsUpgrade kernel6.18-tools-develUpgrade kernel6.18-modules-extraUpgrade kernel-livepatch-6.18.48-107.148Upgrade kernel6.18-headersUpgrade microvm-kernel6.18Upgrade perf6.18-debuginfoUpgrade kernel6.18-tools-debuginfoUpgrade python3-perf6.18-debuginfoUpgrade bpftool6.18Upgrade bpftool6.18-debuginfoUpgrade python3-perf6.18Upgrade kernel6.18-develUpgrade kernel6.18-debuginfo-common-aarch64Upgrade perf6.18Upgrade kernel6.18-debuginfo-common-x86_64Upgrade kernel6.18-debuginfo | Sep 30, 2026 | Aug 22, 2026 |
| Debian | — | Upgrade linux | Nov 3, 2026 | Aug 22, 2026 |
| Redhat_linux | — | No solution exists | Aug 26, 2026 | Aug 22, 2026 |
| Ubuntu | — | Upgrade linux-oem-7.0Upgrade linux-riscv-7.0Upgrade linux-awsUpgrade linux-hwe-7.0Upgrade linuxUpgrade linux-riscvUpgrade linux-ibmUpgrade linux-oracleUpgrade linux-gcp | Nov 3, 2026 | Aug 22, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Nov 4, 2026 | Aug 22, 2026 |
Prioritize with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub