CVE-2026-46215: drm: Set old handle to NULL before prime swap in change_handle

Affected versions

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

• linux linux kernel6.18 and later · before 6.18.32
• linux linux kernel6.19 and later · before 7.0.9
• 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

  • 6.18affected
  • 53096728b8910c6916ecc6c46a5abc5c678b58d9 and later · before 672464dd53231509c9c771110798c56d4660e19eaffected · git
  • 53096728b8910c6916ecc6c46a5abc5c678b58d9 and later · before 61bd96d3e5472c253f9c1ab77608f0c8aaa9d025affected · git
  • 53096728b8910c6916ecc6c46a5abc5c678b58d9 and later · before 5e28b7b94408897e41c63477aabc9e1db439bc8caffected · git
  • before 6.18not affected · semver
  • 6.18.32 and later · up to and including 6.18.*not affected · semver
  • 7.0.9 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-2026-46212May 28, 2026 · batman-adv: bla: prevent use-after-free when deleting claims
  35Monitor
• ← EarlierCVE-2026-46213May 28, 2026 · HID: appletb-kbd: fix UAF in inactivity-timer cleanup path
  31Monitor
• Later →CVE-2026-46216May 28, 2026 · drm/xe/hdcp: Add NULL check for media_gt in intel_hdcp_gsc_check_status()
  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.