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bpf/bonding: reject vlan+srcmac xmit_hash_policy change when XDP is loaded

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: bpf/bonding: reject vlan+srcmac xmit_hash_policy change when XDP is loaded bond_option_mode_set() already rejects mode changes that would make a loaded XDP program incompatible via bond_xdp_check(). However, bond_option_xmit_hash_policy_set() has no such guard. For 802.3ad and balance-xor modes, bond_xdp_check() returns false when xmit_hash_policy is vlan+srcmac, because the 802.1q payload is usually absent due to hardware offload. This means a user can: 1. Attach a native XDP program to a bond in 802.3ad/balance-xor mode with a compatible xmit_hash_policy (e.g. layer2+3). 2. Change xmit_hash_policy to vlan+srcmac while XDP remains loaded. This leaves bond->xdp_prog set but bond_xdp_check() now returning false for the same device. When the bond is later destroyed, dev_xdp_uninstall() calls bond_xdp_set(dev, NULL, NULL) to remove the program, which hits the bond_xdp_check() guard and returns -EOPNOTSUPP, triggering: WARN_ON(dev_xdp_install(dev, mode, bpf_op, NULL, 0, NULL)) Fix this by rejecting xmit_hash_policy changes to vlan+srcmac when an XDP program is loaded on a bond in 802.3ad or balance-xor mode. commit 39a0876d595b ("net, bonding: Disallow vlan+srcmac with XDP") introduced bond_xdp_check() which returns false for 802.3ad/balance-xor modes when xmit_hash_policy is vlan+srcmac. The check was wired into bond_xdp_set() to reject XDP attachment with an incompatible policy, but the symmetric path -- preven

Announced Source revision 1
Original source ↗

CVE-2026-23310

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-2026-23310

Linux

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

Affected versions
Not stated in this record
Fixed versions
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Prerequisites
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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": "39a0876d595bd7c7512782dfcce0ee66f65bf221",
        "lessThan": "0a80e6ecaf669c77260b44254f4a84d76bf83e89",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "39a0876d595bd7c7512782dfcce0ee66f65bf221",
        "lessThan": "5c262bd0e39320a6d6c8277cb8349ce21c01b8c1",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "39a0876d595bd7c7512782dfcce0ee66f65bf221",
        "lessThan": "d36ad7e126c6a0c5f699583309ccc37e3a3263ea",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "39a0876d595bd7c7512782dfcce0ee66f65bf221",
        "lessThan": "0ace8027e41f6f094ef6c1aca42d2ed6cd7af54e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "39a0876d595bd7c7512782dfcce0ee66f65bf221",
        "lessThan": "e85fa809e507b9d8eff4840888b8c727e4e8448c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "39a0876d595bd7c7512782dfcce0ee66f65bf221",
        "lessThan": "479d589b40b836442bbdadc3fdb37f001bb67f26",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/net/bonding/bond_main.c",
      "drivers/net/bonding/bond_options.c",
      "include/net/bonding.h"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.15"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.15",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "6.1.176",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.130",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.77",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.17",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "6.19.7",
        "versionType": "semver",
        "lessThanOrEqual": "6.19.*"
      },
      {
        "status": "unaffected",
        "version": "7.0",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/net/bonding/bond_main.c",
      "drivers/net/bonding/bond_options.c",
      "include/net/bonding.h"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-23310

Source reference: /cveMetadata/cveId

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Event
#27225 · Revision 1
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