CVE-2026-53185: zram: fix use-after-free in zram_bvec_write_partial()

Affected versions

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

• linux linux kernel4.14 and later · before 6.6.143
• linux linux kernel6.7 and later · before 6.12.94
• linux linux kernel6.13 and later · before 6.18.36
• linux linux kernel6.19 and later · before 7.0.13
• 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

  • 4.14affected
  • 8e654f8fbff52ac483fb69957222853d7e2fc588 and later · before 0c2821665ff71be3f4b07ecece384669f2877f6aaffected · git
  • 8e654f8fbff52ac483fb69957222853d7e2fc588 and later · before 77a602b505ce4802915853cfc435a4722fab3e64affected · git
  • 8e654f8fbff52ac483fb69957222853d7e2fc588 and later · before c96786d6ff1acc1d54d9241e97767554c1dfdd5baffected · git
  • 8e654f8fbff52ac483fb69957222853d7e2fc588 and later · before 198b5a14cca27263b9c14b20114c8092de15dfcbaffected · git
  • 8e654f8fbff52ac483fb69957222853d7e2fc588 and later · before 732fd9f0b9c1cdc6dfd77162ded60df005182cc0affected · git
  • before 4.14not affected · semver
  • 6.6.143 and later · up to and including 6.6.*not affected · semver
  • 6.12.94 and later · up to and including 6.12.*not affected · semver
  • 6.18.36 and later · up to and including 6.18.*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-2026-53183Jun 25, 2026 · mptcp: allow subflow rcv wnd to shrink
  30Monitor
• ← EarlierCVE-2026-53184Jun 25, 2026 · udp: clear skb->dev before running a sockmap verdict
  30Monitor
• Later →CVE-2026-53186Jun 25, 2026 · RDMA/srp: bound SRP_RSP sense copy by the received length
  36Monitor

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.