CVE Watchtower

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CVE-2026-63857NVD

Vulnerability Summary

In the Linux kernel, the following vulnerability has been resolved:

net: airoha: Do not read uninitialized fragment address in airoha_dev_xmit()

The transmit loop in airoha_dev_xmit() reads fragment address and length
during its final iteration, when the loop index equals
skb_shinfo(skb)->nr_frags, at which point the fragment data is
uninitialized. While these values are never consumed, the read itself is
unsafe and may trigger a page fault. Fix this by avoiding the fragment
read on the last iteration.
Additionally, move the skb pointer from the first to the last used packet
descriptor, so that airoha_qdma_tx_napi_poll() defers freeing the skb
until the final descriptor is processed.
Severity Level
CRITICAL(9.8)
Published Date
Jul 19, 2026
Last Modified
Nov 12, 2026
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
0.39%Probability
Root Weakness (CWE)
Refer to the official MITRE database for detailed architectural specifications regarding this weakness.
CVSS v3.1 Base Metrics — Score 9.8 (CRITICAL)
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

Affected & Patched Versions

Affected Versions
  • Linux Linux Kernel >= 6.11 and < 6.12.114
  • Linux Linux Kernel >= 6.13 and < 6.18.33
  • Linux Linux Kernel >= 6.19 and < 7.0.10
  • Linux Linux Kernel
Patched Versions
  • Linux Linux Kernel 6.12.114
  • Linux Linux Kernel 6.18.33
  • Linux Linux Kernel 7.0.10
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