CVE-2026-53359: KVM: x86: Fix shadow paging use-after-free due to unexpected role

Affected versions

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

• linux linux kernel2.6.36 and later · before 6.1.177
• linux linux kernel6.2 and later · before 6.6.144
• linux linux kernel6.7 and later · before 6.12.95
• linux linux kernel6.13 and later · before 6.18.38
• linux linux kernel6.19 and later · before 7.1.3

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

  • 2.6.36affected
  • 2032a93d66fa282ba0f2ea9152eeff9511fa9a96 and later · before 0b5e8ead71e683bcf6232db16234cf7e6d553a23affected · git
  • 2032a93d66fa282ba0f2ea9152eeff9511fa9a96 and later · before b1337aae5e194324e4810d561764e7793f8b3864affected · git
  • 2032a93d66fa282ba0f2ea9152eeff9511fa9a96 and later · before 9291654d69e08542de37755cebe4d5b02c3170d1affected · git
  • 2032a93d66fa282ba0f2ea9152eeff9511fa9a96 and later · before 2ad3afa40ac6aa340dada122f9abfa46c0a6eb35affected · git
  • 2032a93d66fa282ba0f2ea9152eeff9511fa9a96 and later · before 5e470998a23e4c3d89ed24e8172cb22747e61efaaffected · git
  • 2032a93d66fa282ba0f2ea9152eeff9511fa9a96 and later · before 1ae7d5a6db6c190ce183e3098ca0e0846e14d462affected · git
  • 2032a93d66fa282ba0f2ea9152eeff9511fa9a96 and later · before 81ccda30b4e83d8f5cc4fd50503c44e3a33abfebaffected · git
  • before 2.6.36not 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-2026-53357Jul 2, 2026 · Bluetooth: fix UAF in l2cap_sock_cleanup_listen() vs l2cap_conn_del()
  32Monitor
• ← EarlierCVE-2026-53358Jul 2, 2026 · Bluetooth: L2CAP: use chan timer to close channels in cleanup_listen()
  35Monitor
• Later →CVE-2026-53360Jul 4, 2026 · KVM: SEV: Require in-GHCB scratch area if GHCB v2+ is in use
  35Monitor

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.