CVE-2021-46911 ch_ktls: Fix kernel panic

2024-02-2706:53:51

Linux

github.com

linux kernel

vulnerability

resolved

ch_ktls

kernel panic

page refcount

tx_ctx lock

AI Score

6.7

Confidence

Low

SSVC

Exploitation

none

Automatable

Technical Impact

partial

JSON

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

ch_ktls: Fix kernel panic

Taking page refcount is not ideal and causes kernel panic
sometimes. It’s better to take tx_ctx lock for the complete
skb transmit, to avoid page cleanup if ACK received in middle.

CNA Affected

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5a4b9fe7fece",
        "lessThan": "8d5a9dbd2116",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5a4b9fe7fece",
        "lessThan": "8348665d4181",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5a4b9fe7fece",
        "lessThan": "1a73e427b824",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/net/ethernet/chelsio/inline_crypto/ch_ktls/chcr_ktls.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.7"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.7",
        "versionType": "custom"
      },
      {
        "status": "unaffected",
        "version": "5.10.32",
        "versionType": "custom",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.11.16",
        "versionType": "custom",
        "lessThanOrEqual": "5.11.*"
      },
      {
        "status": "unaffected",
        "version": "5.12",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/net/ethernet/chelsio/inline_crypto/ch_ktls/chcr_ktls.c"
    ],
    "defaultStatus": "affected"
  }
]