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Review reviewHigh

CVE-2025-68302

Linux

In the Linux kernel, the following vulnerability has been resolved: net: sxgbe: fix potential NULL dereference in sxgbe_rx() Currently, when skb is null, the driver prints an error and then dereferences skb on the next line. To fix this, let's add a 'break' after the error message to switch to sxgbe_rx_refill(), which is similar to the approach taken by the other drivers in this particular case, e.g. calxeda with xgmac_rx(). Found during a code review.

CVSS
7.5
EPSS
0.40%
32.3% percentile
CISA KEV
Not listed
Published
2025.12.17
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.40%
Technical severityCVSS 7.5

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: net: sxgbe: fix potential NULL dereference in sxgbe_rx() Currently, when skb is null, the driver prints an error and then dereferences skb on the next line. To fix this, let's add a 'break' after the error message to switch to sxgbe_rx_refill(), which is similar to the approach taken by the other drivers in this particular case, e.g. calxeda with xgmac_rx(). Found during a code review.

Affected product and versions

Product
Linux
Affected versions
>= 1edb9ca69e8a7988900fc0283e10550b5592164d < ac171c3c755499c9f87fe30b920602255f8b5648, >= 1edb9ca69e8a7988900fc0283e10550b5592164d < 18ef3ad1bb57dcf1a9ee61736039aedccf670b21, >= 1edb9ca69e8a7988900fc0283e10550b5592164d < 46e5332126596a2ca791140feab18ce1fc1a3c86, >= 1edb9ca69e8a7988900fc0283e10550b5592164d < 7fd789d6ea4915034eb6bcb72f6883c8151083e5, >= 1edb9ca69e8a7988900fc0283e10550b5592164d < 45b5b4ddb8d6bea5fc1625ff6f163bbb125d49cc, >= 1edb9ca69e8a7988900fc0283e10550b5592164d < 88f46c0be77bfe45830ac33102c75be7c34ac3f3, >= 1edb9ca69e8a7988900fc0283e10550b5592164d < f5bce28f6b9125502abec4a67d68eabcd24b3b17, >= 3.15
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
Not available