CVE-2026-64424: netpoll: fix a use-after-free on shutdown path

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

• linux linux kernel3.6.1 and later · before 6.12.96
• linux linux kernel6.13 and later · before 6.18.39
• linux linux kernel6.19 and later · before 7.1.4
• linux linux kernel3.6
• linux linux kernel7.2

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

• Linux Linux

  • 3.6affected
  • 38e6bc185d9544dfad1774b3f8902a0b061aea25 and later · before b67625b85c4b1a3725f4be9c6dd8ce3399d11732affected · git
  • 38e6bc185d9544dfad1774b3f8902a0b061aea25 and later · before 95ecc5b58042f6b6743b589e6588f1cd7ba336aaaffected · git
  • 38e6bc185d9544dfad1774b3f8902a0b061aea25 and later · before a33f37f8d079da7236ed7b7e2aed2a34ab81e7cfaffected · git
  • 38e6bc185d9544dfad1774b3f8902a0b061aea25 and later · before 5ed09a108d93a3b002cc79823d9455b50c4a8be7affected · git
  • 38e6bc185d9544dfad1774b3f8902a0b061aea25 and later · before 45f1458a85017a023f138b22ac5c76abd477db42affected · git
  • before 3.6not affected · semver
  • 6.1.191 and later · up to and including 6.1.*not affected · semver
  • 6.12.96 and later · up to and including 6.12.*not affected · semver
  • 6.18.39 and later · up to and including 6.18.*not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Other highest-scoring records for the same primary product.

• CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
  90Now
• CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
  89Now
• CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
  85Now

Published before and after this one in the same product

• ← EarlierCVE-2026-64422Jul 25, 2026 · net: ipv4: bound TCP reordering sysctl writes and MTU probe sizes
  28Monitor
• ← EarlierCVE-2026-64423Jul 25, 2026 · ipv4: igmp: remove multicast group from hash table on device destruction
  31Monitor
• Later →CVE-2026-64425Jul 25, 2026 · io_uring/io-wq: re-check IO_WQ_BIT_EXIT for each linked work item
  22Monitor

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1free(dev->buf);2/* ... another thread is still running ... */3process(dev->buf);

1lock(&dev->lock);2free(dev->buf);3dev->buf = NULL;4unlock(&dev->lock);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.