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tls: Purge async_hold in tls_decrypt_async_wait()

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: tls: Purge async_hold in tls_decrypt_async_wait() The async_hold queue pins encrypted input skbs while the AEAD engine references their scatterlist data. Once tls_decrypt_async_wait() returns, every AEAD operation has completed and the engine no longer references those skbs, so they can be freed unconditionally. A subsequent patch adds batch async decryption to tls_sw_read_sock(), introducing a new call site that must drain pending AEAD operations and release held skbs. Move __skb_queue_purge(&ctx->async_hold) into tls_decrypt_async_wait() so the purge is centralized and every caller -- recvmsg's drain path, the -EBUSY fallback in tls_do_decryption(), and the new read_sock batch path -- releases held skbs on synchronization without each site managing the purge independently. This fixes a leak when tls_strp_msg_hold() fails part-way through, after having added some cloned skbs to the async_hold queue. tls_decrypt_sg() will then call tls_decrypt_async_wait() to process all pending decrypts, and drop back to synchronous mode, but tls_sw_recvmsg() only flushes the async_hold queue when one record has been processed in "fully-async" mode, which may not be the case here. [pabeni@redhat.com: added leak comment]

Announced Source revision 1
Original source ↗

CVE-2026-23414

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-23414

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "9f83fd0c179e0f458e824e417f9d5ad53443f685",
        "lessThan": "ac435be7c7613eb13a5a8ceb5182e10b50c9ce87",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c61d4368197d65c4809d9271f3b85325a600586a",
        "lessThan": "2dcf324855c34e7f934ce978aa19b645a8f3ee71",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "39dec4ea3daf77f684308576baf483b55ca7f160",
        "lessThan": "6dc11e0bd0a5466bcc76d275c09e5537bd0597dd",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b8a6ff84abbcbbc445463de58704686011edc8e1",
        "lessThan": "9f557c7eae127b44d2e863917dc986a4b6cb1269",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b8a6ff84abbcbbc445463de58704686011edc8e1",
        "lessThan": "fd8037e1f18ca5336934d0e0e7e1a4fe097e749d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b8a6ff84abbcbbc445463de58704686011edc8e1",
        "lessThan": "84a8335d8300576f1b377ae24abca1d9f197807f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4fc109d0ab196bd943b7451276690fb6bb48c2e0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6.1.158",
        "lessThan": "6.1.168",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "6.6.114",
        "lessThan": "6.6.131",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "6.12.55",
        "lessThan": "6.12.80",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "6.17.5",
        "lessThan": "6.18",
        "versionType": "semver"
      }
    ],
    "programFiles": [
      "net/tls/tls_sw.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "6.18"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "6.18",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "6.1.168",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.131",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.80",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.21",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "6.19.11",
        "versionType": "semver",
        "lessThanOrEqual": "6.19.*"
      },
      {
        "status": "unaffected",
        "version": "7.0",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/tls/tls_sw.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-23414

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#39846 · Revision 1
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