Answer in brief
CVE-2026-98622 records a Unknown severity vulnerability in net/sched: act_ct: don't WARN on benign flow_offload_alloc() failure. 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.
A CVSS score is not reported in the current record. 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.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=64ff70b80fd403110b67dd9f7184a604fdb0da43 <e8fcf3f08834e939b797311742ee72b1e2a08096 || >=64ff70b80fd403110b67dd9f7184a604fdb0da43 <af475f599270e59313552e6c6f3af8507da672b8 || >=64ff70b80fd403110b67dd9f7184a604fdb0da43 <424ba52c0058deeb940d02cba52eb0aeb288db33 || >=64ff70b80fd403110b67dd9f7184a604fdb0da43 <d512c484bd93a5f2794aa03c9faeb7bcb82dbd4a || >=64ff70b80fd403110b67dd9f7184a604fdb0da43 <d805560ad69cb266d669341ca01e26bffb0d2c67 || >=64ff70b80fd403110b67dd9f7184a604fdb0da43 <00734f3684fcec42c319bedfe68a5d357c720b53 || >=64ff70b80fd403110b67dd9f7184a604fdb0da43 <650787233c2fd6e515a7c5f371019a9fa080ccd2 || >=64ff70b80fd403110b67dd9f7184a604fdb0da43 <47abe7a5c4eb53269aca3506446f851572a059a3 | e8fcf3f08834e939b797311742ee72b1e2a08096, af475f599270e59313552e6c6f3af8507da672b8, 424ba52c0058deeb940d02cba52eb0aeb288db33, d512c484bd93a5f2794aa03c9faeb7bcb82dbd4a, d805560ad69cb266d669341ca01e26bffb0d2c67, 00734f3684fcec42c319bedfe68a5d357c720b53, 650787233c2fd6e515a7c5f371019a9fa080ccd2, 47abe7a5c4eb53269aca3506446f851572a059a3 |
| Linux/Linuxgeneric | 5.7 | Not reported |
Published upstream
Oct 18, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 18, 2026
In the Linux kernel, the following vulnerability has been resolved: net/sched: act_ct: don't WARN on benign flow_offload_alloc() failure flow_offload_alloc() returns NULL when the conntrack entry is dying (e.g. raced with a conntrack flush) or when the GFP_ATOMIC allocation fails; both are expected under load and neither is a kernel bug. This path runs from softirq on every committed packet, so with panic_on_warn=1 an unprivileged user can panic the box just by racing a conntrack flush against a `tc ... action ct commit` classifier. Reproduced with a custom repro under QEMU: a small, fixed set of UDP flows through `tc filter ... action ct commit` on lo, raced against threads flooding bare ctnetlink CT_DELETE (flush) requests. Hits WARNING: net/sched/act_ct.c:437 (tcf_ct_flow_table_add(), inlined into tcf_ct_act() in this build) within ~15s on the unpatched kernel; same setup is clean on the patched kernel. The fix itself is behavior-preserving: both branches already did `goto err_alloc` before and after, only the WARN is removed.
Quoted source text, attributed separately from HOL analysis.