What is CVE-2026-74728?

CVE-2026-74728 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 6.9 onward and patched in 6.18.45, 7.1.9 and 7.2. CVE-2026-74728 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-74728?

CVE-2026-74728 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2026-74728?

Yes, CVE-2026-74728 has been patched. Fixed versions include 6.18.45, 7.1.9 and 7.2. If you are running Linux kernel 6.9 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-74728 actively exploited?

CVE-2026-74728 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

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.

Package Linux Kernel

Published 2026-08-22

Last modified 2026-08-22

Patch available

Yes

Affected versions

Linux kernel versions 6.9 and later are affected. Fixed in 6.18.45, 7.1.9, 7.2 and their respective stable series.

Affected from

≥ 6.9

Fixed in

✓ 6.18.45 6.18.x ✓ 7.1.9 7.1.x ✓ 7.2

References

3 total

Frequently asked questions

What is CVE-2026-74728?

CVE-2026-74728 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.9 onward and has been patched in 6.18.45, 7.1.9 and 7.2. CVE-2026-74728 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2026-74728?

Yes. CVE-2026-74728 has been patched. Fixed versions include 6.18.45, 7.1.9 and 7.2. If you are running Linux kernel 6.9 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-74728 actively exploited?

No. CVE-2026-74728 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.