CVE-2026-46113: KVM: x86: Fix shadow paging use-after-free due to unexpected GFN

Affected versions

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

• linux linux kernel2.6.20 and later · before 6.1.175
• linux linux kernel6.2 and later · before 6.6.140
• linux linux kernel6.7 and later · before 6.12.88
• linux linux kernel6.13 and later · before 6.18.30
• linux linux kernel6.19 and later · before 7.0.7
• 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

  • 2.6.20affected
  • 6aa8b732ca01c3d7a54e93f4d701b8aabbe60fb7 and later · before 9597963a8ca16259d194a1d9950d7bd22a10ab2faffected · git
  • 6aa8b732ca01c3d7a54e93f4d701b8aabbe60fb7 and later · before e9d4ea13aa2b6400bb10ec64b370ba3dadcd22f0affected · git
  • 6aa8b732ca01c3d7a54e93f4d701b8aabbe60fb7 and later · before 488e386484ec8c0e558be6e156edf34ed9f4d5c8affected · git
  • 6aa8b732ca01c3d7a54e93f4d701b8aabbe60fb7 and later · before 06c19c967b845b63172601fe459667d973b7e6b7affected · git
  • 6aa8b732ca01c3d7a54e93f4d701b8aabbe60fb7 and later · before 738ec97b1855df6c08fe2369f798fa0b972e556baffected · git
  • 6aa8b732ca01c3d7a54e93f4d701b8aabbe60fb7 and later · before 14d1e55dfd2cf4711bff164a6aaaddb783552134affected · git
  • 6aa8b732ca01c3d7a54e93f4d701b8aabbe60fb7 and later · before 0cb2af2ea66ad8ff195c156ea690f11216285bdfaffected · git
  • before 2.6.20not affected · semver
  • 5.15.222 and later · up to and including 5.15.*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-2026-46110May 28, 2026 · net: stmmac: Prevent NULL deref when RX memory exhausted
  30Monitor
• ← EarlierCVE-2026-46111May 28, 2026 · Bluetooth: hci_conn: fix potential UAF in create_big_sync
  31Monitor
• Later →CVE-2026-46114May 28, 2026 · RDMA/rxe: Reject non-8-byte ATOMIC_WRITE payloads
  30Monitor

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.