CVE-2026-53006: ipv6: fix possible UAF in icmpv6_rcv()

Affected versions

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

• linux linux kernel4.4 and later · before 5.10.258
• linux linux kernel5.11 and later · before 5.15.209
• linux linux kernel5.16 and later · before 6.1.175
• linux linux kernel6.2 and later · before 6.6.141
• linux linux kernel6.7 and later · before 6.12.91
• linux linux kernel6.13 and later · before 6.18.33
• linux linux kernel6.19 and later · before 7.0.10
• redhat enterprise linux10.0
• redhat enterprise linux8.0
• redhat enterprise linux9.0

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

  • 4.4affected
  • 4b3418fba0fe819197e3359d5ddbef84ba2c59de and later · before 7bff2c8fe5c35ae58bf73104f53db3676e6e5d94affected · git
  • 4b3418fba0fe819197e3359d5ddbef84ba2c59de and later · before aff0f28f5be803de2452ce702631c021fcd9ce8aaffected · git
  • 4b3418fba0fe819197e3359d5ddbef84ba2c59de and later · before 38bdbc897c0d83a3e2b925a51b69420f1feba29aaffected · git
  • 4b3418fba0fe819197e3359d5ddbef84ba2c59de and later · before 0069813e6ca9309eca78022bcb3aeb1e9ef90a12affected · git
  • 4b3418fba0fe819197e3359d5ddbef84ba2c59de and later · before 1e1f0f89ee4692a64be3f3707ff8ac1ae57b03e7affected · git
  • 4b3418fba0fe819197e3359d5ddbef84ba2c59de and later · before 7c66b368c6ff453f99cb39d84af93e908e51eef2affected · git
  • 4b3418fba0fe819197e3359d5ddbef84ba2c59de and later · before 085e31a811ef234ef8c3e219c4636dfebfe7e10faffected · git
  • 4b3418fba0fe819197e3359d5ddbef84ba2c59de and later · before f996edd7615e686ada141b7f3395025729ff8ccbaffected · git
  • before 4.4not 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-2026-53003Jun 24, 2026 · pppoe: drop PFC frames
  30Monitor
• ← EarlierCVE-2026-53005Jun 24, 2026 · af_unix: Drop all SCM attributes for SOCKMAP.
  31Monitor
• Later →CVE-2026-53007Jun 24, 2026 · ice: fix potential NULL pointer deref in error path of ice_set_ringparam()
  22Monitor

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.