CVE-2025-37803: udmabuf: fix a buf size overflow issue during udmabuf creation

Affected versions

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

• linux linux kernelbefore 5.4.293
• linux linux kernel5.5 and later · before 5.10.237
• linux linux kernel5.11 and later · before 5.15.181
• linux linux kernel5.16 and later · before 6.1.136
• linux linux kernel6.2 and later · before 6.6.89
• linux linux kernel6.7 and later · before 6.14.5
• linux linux kernel6.15

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

  • 4.20affected
  • fbb0de795078190a9834b3409e4b009cfb18a6d4 and later · before e84a08fc7e25cdad5d9a3def42cc770ff711193faffected · git
  • fbb0de795078190a9834b3409e4b009cfb18a6d4 and later · before 13fe12c037b470321436deec393030c6153cfeb9affected · git
  • fbb0de795078190a9834b3409e4b009cfb18a6d4 and later · before 373512760e13fdaa726faa9502d0f5be2abb3d33affected · git
  • fbb0de795078190a9834b3409e4b009cfb18a6d4 and later · before 3f6c9d66e0f8eb9679b57913aa64b4d2266f6fbeaffected · git
  • fbb0de795078190a9834b3409e4b009cfb18a6d4 and later · before b2ff4e9c599b000833d16a917f519aa2e4a75de2affected · git
  • fbb0de795078190a9834b3409e4b009cfb18a6d4 and later · before 29b65a3171a49c9b69f31035146be966cec40b7aaffected · git
  • fbb0de795078190a9834b3409e4b009cfb18a6d4 and later · before 2b8419c6ecf69007dcff54ea0b9f0b215282c55aaffected · git
  • fbb0de795078190a9834b3409e4b009cfb18a6d4 and later · before 021ba7f1babd029e714d13a6bf2571b08af96d0faffected · git
  • before 4.20not 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-2020-36791May 7, 2025 · net_sched: keep alloc_hash updated after hash allocation
  28Monitor
• ← EarlierCVE-2025-37802May 8, 2025 · ksmbd: fix WARNING "do not call blocking ops when !TASK_RUNNING"
  22Monitor
• Later →CVE-2025-37805May 8, 2025 · sound/virtio: Fix cancel_sync warnings on uninitialized work_structs
  22Monitor

Root cause

When data is copied, the source length is not compared with the size of the destination buffer. Excess data overwrites adjacent memory.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1char buf[256];2memcpy(buf, pkt->data, pkt->len);

1char buf[256];2if (pkt->len > sizeof(buf)) {3  return -EINVAL;4}5memcpy(buf, pkt->data, pkt->len);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.