net: dsa: bcm_sf2: bound the CFP rule dump by the caller's buffer size
In the Linux kernel, the following vulnerability has been resolved: net: dsa: bcm_sf2: bound the CFP rule dump by the caller's buffer size bcm_sf2_cfp_rule_get_all() walks the whole cfp.unique bitmap into rule_locs[] without consulting nfc->rule_cnt, which is how many entries the caller had room for. ETHTOOL_GRXCLSRLALL requires no CAP_NET_ADMIN and the ioctl sizes the buffer from the rule_cnt userspace passes in, so once an admin has installed CFP rules any user can ask for fewer slots than there are rules and run off the end of the allocation. A rule_cnt of 0 leaves the buffer pointer NULL and the walk dereferences it.
CVE-2026-98030
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-2026-98030
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": "7318166cacad158b46240f66250d7cc5a481653b",
"lessThan": "ca49c526291d7cd3a5cb49b0edd7f50a5ae7176e",
"versionType": "git"
},
{
"status": "affected",
"version": "7318166cacad158b46240f66250d7cc5a481653b",
"lessThan": "8e41ce02589c92356bfd8ef62f6ceff840546e1a",
"versionType": "git"
},
{
"status": "affected",
"version": "7318166cacad158b46240f66250d7cc5a481653b",
"lessThan": "f2cf4ef2d94fc15fd2e21c131fc1ab3f76125bf4",
"versionType": "git"
},
{
"status": "affected",
"version": "7318166cacad158b46240f66250d7cc5a481653b",
"lessThan": "f5e93162b3dd195bfda815e8f7a39aaf1d45437b",
"versionType": "git"
},
{
"status": "affected",
"version": "7318166cacad158b46240f66250d7cc5a481653b",
"lessThan": "f1a2869b3629c0e8394b77b38cb9f19a018c653c",
"versionType": "git"
},
{
"status": "affected",
"version": "7318166cacad158b46240f66250d7cc5a481653b",
"lessThan": "fd1a78c16b1f6978c09cf048e15f349732e4c707",
"versionType": "git"
},
{
"status": "affected",
"version": "7318166cacad158b46240f66250d7cc5a481653b",
"lessThan": "b231b6d8516d3fe0d4bba549908e08d26a4531a5",
"versionType": "git"
},
{
"status": "affected",
"version": "7318166cacad158b46240f66250d7cc5a481653b",
"lessThan": "cdb719f4b8596d9ccee2d56d204c2c4dce982f46",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/dsa/bcm_sf2_cfp.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.11"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.11",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.271",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.222",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.111",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.53",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.7",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/net/dsa/bcm_sf2_cfp.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98030
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #38155 · Revision 1
- Added to Heist Feed
- Publisher date