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net: tls: fix strparser anchor skb leak on offload RX setup failure

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: net: tls: fix strparser anchor skb leak on offload RX setup failure When tls_set_device_offload_rx() fails at tls_dev_add(), the error path calls tls_sw_free_resources_rx() to clean up the SW context that was initialized by tls_set_sw_offload(). This function calls tls_sw_release_resources_rx() (which stops the strparser via tls_strp_stop()) and tls_sw_free_ctx_rx() (which kfrees the context), but never frees the anchor skb that was allocated by alloc_skb(0) in tls_strp_init(). Note that tls_sw_free_resources_rx() is exclusively used for this "failed to start offload" code path, there's no other caller. The leak did not exist before commit 84c61fe1a75b ("tls: rx: do not use the standard strparser"), because the standard strparser doesn't try to pre-allocate an skb. The normal close path in tls_sk_proto_close() handles cleanup by calling tls_sw_strparser_done() (which calls tls_strp_done()) after dropping the socket lock, because tls_strp_done() does cancel_work_sync() and the strparser work handler takes the socket lock.

Announced Source revision 1
Original source ↗

CVE-2026-52974

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-2026-52974

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": "84c61fe1a75b4255df1e1e7c054c9e6d048da417",
        "lessThan": "0c9f399b37ce22a5ed94cc51f03ed07ac7f38e32",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "84c61fe1a75b4255df1e1e7c054c9e6d048da417",
        "lessThan": "688f12aa44511dd57e448eb670075c6302ad1dc1",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "84c61fe1a75b4255df1e1e7c054c9e6d048da417",
        "lessThan": "3c405dfa9619e506e75b8e41f8b29a5b99731877",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "84c61fe1a75b4255df1e1e7c054c9e6d048da417",
        "lessThan": "9c54e76f8d6eb11735918777ef0e0509e089557d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "84c61fe1a75b4255df1e1e7c054c9e6d048da417",
        "lessThan": "bd07fe6c38b9e44ff3fc02692a53f095c5cc9afc",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "84c61fe1a75b4255df1e1e7c054c9e6d048da417",
        "lessThan": "58689498ca3384851145a754dbb1d8ed1cf9fb54",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/tls/tls.h",
      "net/tls/tls_strp.c",
      "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": "6.0"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "6.0",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "6.1.175",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.141",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.91",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.33",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.0.10",
        "versionType": "semver",
        "lessThanOrEqual": "7.0.*"
      },
      {
        "status": "unaffected",
        "version": "7.1",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/tls/tls.h",
      "net/tls/tls_strp.c",
      "net/tls/tls_sw.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-52974

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#40719 · Revision 1
Added to Heist Feed
Publisher date
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