netfilter: conntrack: revisit gc autotuning
In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: revisit gc autotuning as of commit 4608fdfc07e1 ("netfilter: conntrack: collect all entries in one cycle") conntrack gc was changed to run every 2 minutes. On systems where conntrack hash table is set to large value, most evictions happen from gc worker rather than the packet path due to hash table distribution. This causes netlink event overflows when events are collected. This change collects average expiry of scanned entries and reschedules to the average remaining value, within 1 to 60 second interval. To avoid event overflows, reschedule after each bucket and add a limit for both run time and number of evictions per run. If more entries have to be evicted, reschedule and restart 1 jiffy into the future.
CVE-2022-49110
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-2022-49110
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": "4608fdfc07e116f9fc0895beb40abad7cdb5ee3d",
"lessThan": "58d52743ae85d28c9335c6034d6ce350b8689951",
"versionType": "git"
},
{
"status": "affected",
"version": "4608fdfc07e116f9fc0895beb40abad7cdb5ee3d",
"lessThan": "7cd361d5e6d986c0d4cafb9ceaa803359048ae15",
"versionType": "git"
},
{
"status": "affected",
"version": "4608fdfc07e116f9fc0895beb40abad7cdb5ee3d",
"lessThan": "592e57591826f3d09c28d755a39ea8e9d13705ad",
"versionType": "git"
},
{
"status": "affected",
"version": "4608fdfc07e116f9fc0895beb40abad7cdb5ee3d",
"lessThan": "2cfadb761d3d0219412fd8150faea60c7e863833",
"versionType": "git"
},
{
"status": "affected",
"version": "dafc95a1e473a0b857af34ecbb17b8b1c90edd75",
"versionType": "git"
},
{
"status": "affected",
"version": "5892f910f401c1facfc410e0b042108f2827a77b",
"versionType": "git"
},
{
"status": "affected",
"version": "f68ad168e23565ce2a3891fec537cfaf8410d1e6",
"versionType": "git"
},
{
"status": "affected",
"version": "7aa03980b21fdc7355e20274a68a69a0b2a45c08",
"versionType": "git"
},
{
"status": "affected",
"version": "4.19.206",
"lessThan": "4.20",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.4.144",
"lessThan": "5.5",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.10.62",
"lessThan": "5.11",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.13.14",
"lessThan": "5.14",
"versionType": "semver"
}
],
"programFiles": [
"net/netfilter/nf_conntrack_core.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.14"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.14",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.15.34",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "5.16.20",
"versionType": "semver",
"lessThanOrEqual": "5.16.*"
},
{
"status": "unaffected",
"version": "5.17.3",
"versionType": "semver",
"lessThanOrEqual": "5.17.*"
},
{
"status": "unaffected",
"version": "5.18",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/netfilter/nf_conntrack_core.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2022-49110
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #30180 · Revision 1
- Added to Heist Feed
- Publisher date