CVE-2023-32233: In the Linux kernel through 6.3.1, a use-after-free in Netfilter nf_tables when processing batch requests can be abused to perform arbitrary

Affected versions

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

• linux linux kernel3.13 and later · before 4.14.315
• linux linux kernel4.15 and later · before 4.19.283
• linux linux kernel4.20 and later · before 5.4.243
• linux linux kernel5.5 and later · before 5.10.180
• linux linux kernel5.11 and later · before 5.15.111
• linux linux kernel5.16 and later · before 6.1.28
• linux linux kernel6.2 and later · before 6.2.15
• linux linux kernel6.3 and later · before 6.3.2
• netapp hci baseboard management controllerh300s
• netapp hci baseboard management controllerh410c
• netapp hci baseboard management controllerh410s
• netapp hci baseboard management controllerh500s
• netapp hci baseboard management controllerh700s
• redhat enterprise linux7.0
• redhat enterprise linux8.0
• redhat enterprise linux9.0

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-2023-32269May 5, 2023 · An issue was discovered in the Linux kernel before 6.1.11.
  26Monitor
• ← EarlierCVE-2023-2513May 8, 2023 · A use-after-free vulnerability was found in the Linux kernel's ext4 filesystem in the way it handled the extra inode size for extended attri
  26Monitor
• Later →CVE-2023-2156May 9, 2023 · A flaw was found in the networking subsystem of the Linux kernel within the handling of the RPL protocol.
  32Monitor

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.