CVE-2026-52971: net: ena: PHC: Fix potential use-after-free in get_timestamp

Affected versions

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

• linux linux kernel6.17 and later · before 6.18.33
• linux linux kernel6.19 and later · before 7.0.10
• linux linux kernel7.1

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

  • 6.17affected
  • e0ea34158ee8c4f7536cd781010339ff28c0d24c and later · before 95e8ae9af2a61b4e72f5c585bf4c7d8aaf2a2c98affected · git
  • e0ea34158ee8c4f7536cd781010339ff28c0d24c and later · before ca9ed40f28949353911dcb524ff8fff2f3409c97affected · git
  • e0ea34158ee8c4f7536cd781010339ff28c0d24c and later · before e42c755582f0960e684298762f0ab927b3778376affected · git
  • before 6.17not affected · semver
  • 6.18.33 and later · up to and including 6.18.*not affected · semver
  • 7.0.10 and later · up to and including 7.0.*not affected · semver
  • 7.1 and laternot affected · original_commit_for_fix

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-2026-52968Jun 24, 2026 · KVM: s390: pci: fix GAIT table indexing due to double-scaling pointer arithmetic
  28Monitor
• ← EarlierCVE-2026-52970Jun 24, 2026 · netfilter: nft_ct: fix missing expect put in obj eval
  22Monitor
• Later →CVE-2026-52972Jun 24, 2026 · crypto: af_alg - Cap AEAD AD length to 0x80000000
  22Monitor

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.