Answer in brief
CVE-2022-49561 records a Critical severity (CVSS 9.8) vulnerability in netfilter: conntrack: re-fetch conntrack after insertion. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2022-49561 records a Critical severity (CVSS 9.8) vulnerability in netfilter: conntrack: re-fetch conntrack after insertion. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=71d8c47fc653711c41bc3282e5b0e605b3727956 <e97222b785e70e8973281666d709baad6523d8af || >=71d8c47fc653711c41bc3282e5b0e605b3727956 <92a999d1963eed0df666284e20055136ceabd12f || >=71d8c47fc653711c41bc3282e5b0e605b3727956 <b16bb373988da3ceb0308381634117e18b6ec60d || >=71d8c47fc653711c41bc3282e5b0e605b3727956 <91a36ec160ec1a0c8f5352b772dffcbb0b6023e3 || >=71d8c47fc653711c41bc3282e5b0e605b3727956 <01989d7eebb61c99bd4b88ebc8e261bd2f02caed || >=71d8c47fc653711c41bc3282e5b0e605b3727956 <04f9e9104c969d8ce10a4a43634f641ed082092d || >=71d8c47fc653711c41bc3282e5b0e605b3727956 <04e4a11dc723c52db7a36dc58f0d69ce6426f8f0 || >=71d8c47fc653711c41bc3282e5b0e605b3727956 <56b14ecec97f39118bf85c9ac2438c5a949509ed | e97222b785e70e8973281666d709baad6523d8af, 92a999d1963eed0df666284e20055136ceabd12f, b16bb373988da3ceb0308381634117e18b6ec60d, 91a36ec160ec1a0c8f5352b772dffcbb0b6023e3, 01989d7eebb61c99bd4b88ebc8e261bd2f02caed, 04f9e9104c969d8ce10a4a43634f641ed082092d, 04e4a11dc723c52db7a36dc58f0d69ce6426f8f0, 56b14ecec97f39118bf85c9ac2438c5a949509ed |
| Linux/Linuxgeneric | 4.7 | Not reported |
Published upstream
Feb 26, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: re-fetch conntrack after insertion In case the conntrack is clashing, insertion can free skb->_nfct and set skb->_nfct to the already-confirmed entry. This wasn't found before because the conntrack entry and the extension space used to free'd after an rcu grace period, plus the race needs events enabled to trigger.
Quoted source text, attributed separately from HOL analysis.
CVSS is 9.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=71d8c47fc653711c41bc3282e5b0e605b3727956 <e97222b785e70e8973281666d709baad6523d8af || >=71d8c47fc653711c41bc3282e5b0e605b3727956 <92a999d1963eed0df666284e20055136ceabd12f || >=71d8c47fc653711c41bc3282e5b0e605b3727956 <b16bb373988da3ceb0308381634117e18b6ec60d || >=71d8c47fc653711c41bc3282e5b0e605b3727956 <91a36ec160ec1a0c8f5352b772dffcbb0b6023e3 || >=71d8c47fc653711c41bc3282e5b0e605b3727956 <01989d7eebb61c99bd4b88ebc8e261bd2f02caed || >=71d8c47fc653711c41bc3282e5b0e605b3727956 <04f9e9104c969d8ce10a4a43634f641ed082092d || >=71d8c47fc653711c41bc3282e5b0e605b3727956 <04e4a11dc723c52db7a36dc58f0d69ce6426f8f0 || >=71d8c47fc653711c41bc3282e5b0e605b3727956 <56b14ecec97f39118bf85c9ac2438c5a949509ed | e97222b785e70e8973281666d709baad6523d8af, 92a999d1963eed0df666284e20055136ceabd12f, b16bb373988da3ceb0308381634117e18b6ec60d, 91a36ec160ec1a0c8f5352b772dffcbb0b6023e3, 01989d7eebb61c99bd4b88ebc8e261bd2f02caed, 04f9e9104c969d8ce10a4a43634f641ed082092d, 04e4a11dc723c52db7a36dc58f0d69ce6426f8f0, 56b14ecec97f39118bf85c9ac2438c5a949509ed |
| Linux/Linuxgeneric | 4.7 | Not reported |
Published upstream
Feb 26, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: re-fetch conntrack after insertion In case the conntrack is clashing, insertion can free skb->_nfct and set skb->_nfct to the already-confirmed entry. This wasn't found before because the conntrack entry and the extension space used to free'd after an rcu grace period, plus the race needs events enabled to trigger.
Quoted source text, attributed separately from HOL analysis.