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iavf: fix off-by-one issues in iavf_config_rss_reg()

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: iavf: fix off-by-one issues in iavf_config_rss_reg() There are off-by-one bugs when configuring RSS hash key and lookup table, causing out-of-bounds reads to memory [1] and out-of-bounds writes to device registers. Before commit 43a3d9ba34c9 ("i40evf: Allow PF driver to configure RSS"), the loop upper bounds were: i <= I40E_VFQF_{HKEY,HLUT}_MAX_INDEX which is safe since the value is the last valid index. That commit changed the bounds to: i <= adapter->rss_{key,lut}_size / 4 where `rss_{key,lut}_size / 4` is the number of dwords, so the last valid index is `(rss_{key,lut}_size / 4) - 1`. Therefore, using `<=` accesses one element past the end. Fix the issues by using `<` instead of `<=`, ensuring we do not exceed the bounds. [1] KASAN splat about rss_key_size off-by-one BUG: KASAN: slab-out-of-bounds in iavf_config_rss+0x619/0x800 Read of size 4 at addr ffff888102c50134 by task kworker/u8:6/63 CPU: 0 UID: 0 PID: 63 Comm: kworker/u8:6 Not tainted 6.18.0-rc2-enjuk-tnguy-00378-g3005f5b77652-dirty #156 PREEMPT(voluntary) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Workqueue: iavf iavf_watchdog_task Call Trace: dump_stack_lvl+0x6f/0xb0 print_report+0x170/0x4f3 kasan_report+0xe1/0x1a0 iavf_config_rss+0x619/0x800 iavf_watchdog_task+0x2be7/0x3230 process_one_work+0x7fd/0x1420 worker_thread+0x4d1/0xd40 kthread+0x344/0x660 ret_from_fork+0x249/0x320 ret_from_fork_asm+0x1a/0

Announced Source revision 1
Original source ↗

CVE-2025-71087

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-2025-71087

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": "43a3d9ba34c9ca313573201d3f45de5ab3494cec",
        "lessThan": "ceb8459df28d22c225a82d74c0f725f2a935d194",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "43a3d9ba34c9ca313573201d3f45de5ab3494cec",
        "lessThan": "5bb18bfd505ca1affbca921462c350095a6c798c",
        "versionType": "git"
      },
      {
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        "lessThan": "d7369dc8dd7cbf5cee3a22610028d847b6f02982",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "43a3d9ba34c9ca313573201d3f45de5ab3494cec",
        "lessThan": "18de0e41d69d97fab10b91fecf10ae78a5e43232",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "43a3d9ba34c9ca313573201d3f45de5ab3494cec",
        "lessThan": "f36de3045d006e6d9be1be495f2ed88d1721e752",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "43a3d9ba34c9ca313573201d3f45de5ab3494cec",
        "lessThan": "3095228e1320371e143835d0cebeef1a8a754c66",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "43a3d9ba34c9ca313573201d3f45de5ab3494cec",
        "lessThan": "6daa2893f323981c7894c68440823326e93a7d61",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/net/ethernet/intel/iavf/iavf_main.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4.7"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.7",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.248",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.198",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.160",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.120",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.64",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.4",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "6.19",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/net/ethernet/intel/iavf/iavf_main.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2025-71087

Source reference: /cveMetadata/cveId

Publisher severity

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Event
#39144 · Revision 1
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