iavf: fix off-by-one issues in iavf_config_rss_reg()
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
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"
},
{
"status": "affected",
"version": "43a3d9ba34c9ca313573201d3f45de5ab3494cec",
"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
No explicit severity was provided.
- Event
- #39144 · Revision 1
- Added to Heist Feed
- Publisher date