CVE-2024-26583 tls: fix race between async notify and socket close

2024-02-2114:59:11

Linux

www.cve.org

vulnerability

resolution

linux kernel

tls

async notification

socket close

crypto handler

synchronization

6.1 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

5.1%

JSON

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

tls: fix race between async notify and socket close

The submitting thread (one which called recvmsg/sendmsg)
may exit as soon as the async crypto handler calls complete()
so any code past that point risks touching already freed data.

Try to avoid the locking and extra flags altogether.
Have the main thread hold an extra reference, this way
we can depend solely on the atomic ref counter for
synchronization.

Don’t futz with reiniting the completion, either, we are now
tightly controlling when completion fires.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "include/net/tls.h",
      "net/tls/tls_sw.c"
    ],
    "versions": [
      {
        "version": "0cada33241d9",
        "lessThan": "f17d21ea7391",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "0cada33241d9",
        "lessThan": "7a3ca06d04d5",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "0cada33241d9",
        "lessThan": "86dc27ee36f5",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "0cada33241d9",
        "lessThan": "6209319b2efd",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "0cada33241d9",
        "lessThan": "aec7961916f3",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "include/net/tls.h",
      "net/tls/tls_sw.c"
    ],
    "versions": [
      {
        "version": "5.7",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.7",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.160",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.79",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.18",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.7.6",
        "lessThanOrEqual": "6.7.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.8",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]