Answer in brief
CVE-2024-49855 records a Critical severity (CVSS 9.8) vulnerability in nbd: fix race between timeout and normal completion. 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.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | 5.19 | Not reported |
| Linux/Linuxgeneric | >=2895f1831e911ca87d4efdf43e35eb72a0c7e66e <9c25faf72d780a9c71081710cd48759d61ff6e9b || >=2895f1831e911ca87d4efdf43e35eb72a0c7e66e <6e73b946a379a1dfbb62626af93843bdfb53753d || >=2895f1831e911ca87d4efdf43e35eb72a0c7e66e <5236ada8ebbd9e7461f17477357582f5be4f46f7 || >=2895f1831e911ca87d4efdf43e35eb72a0c7e66e <9a74c3e6c0d686c26ba2aab66d15ddb89dc139cc || >=2895f1831e911ca87d4efdf43e35eb72a0c7e66e <c9ea57c91f03bcad415e1a20113bdb2077bcf990 || cdf62c535a9bfd5ff0eef4b91669da39d8abc0c3 || 5171ef20bae852ff38f4cfdb368bcdcc744776d0 || >=5.17.15 <5.18 || >=5.18.4 <5.19 | 9c25faf72d780a9c71081710cd48759d61ff6e9b, 6e73b946a379a1dfbb62626af93843bdfb53753d, 5236ada8ebbd9e7461f17477357582f5be4f46f7, 9a74c3e6c0d686c26ba2aab66d15ddb89dc139cc, c9ea57c91f03bcad415e1a20113bdb2077bcf990, 5.18, 5.19 |
Published upstream
Oct 21, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: nbd: fix race between timeout and normal completion If request timetout is handled by nbd_requeue_cmd(), normal completion has to be stopped for avoiding to complete this requeued request, other use-after-free can be triggered. Fix the race by clearing NBD_CMD_INFLIGHT in nbd_requeue_cmd(), meantime make sure that cmd->lock is grabbed for clearing the flag and the requeue.
Quoted source text, attributed separately from HOL analysis.