Answer in brief
CVE-2026-98586 records a Unknown severity vulnerability in sctp: hold asoc or transport before mod_timer() in timer handlers. 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 | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f7dea7eaea20fe9b80f8f77ba44d02b4a17f8050 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f9d929026d487a988bfa12c065f892e823e5b6ab || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9d3d39da054476e7aa05cd877b93ca73a9a77434 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <27c51a9b55b227309161c903f9ecfbf022516bc2 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d18cb8fd1b6ba95c85de644203cfe1b071ff0c0f || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <35bf3b23c9a871f44c1453d85f8332be4e088dda || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cae23ae3f7887a1cf8a75da38edcebeef695040f | f7dea7eaea20fe9b80f8f77ba44d02b4a17f8050, f9d929026d487a988bfa12c065f892e823e5b6ab, 9d3d39da054476e7aa05cd877b93ca73a9a77434, 27c51a9b55b227309161c903f9ecfbf022516bc2, d18cb8fd1b6ba95c85de644203cfe1b071ff0c0f, 35bf3b23c9a871f44c1453d85f8332be4e088dda, cae23ae3f7887a1cf8a75da38edcebeef695040f |
| Linux/Linuxgeneric | 2.6.12 | 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: sctp: hold asoc or transport before mod_timer() in timer handlers Take the association or transport reference before rearming a timer in the timer handlers. The existing code calls mod_timer() before taking the reference needed by the rearmed timer without holding the sock lock. This creates a race with timer cleanup: if the timer is deleted after mod_timer() returns but before the reference is taken, the cleanup path can drop the timer's reference and destroy the transport or association. The timer handler then takes a reference on the already freed object and eventually drops it, causing a refcount underflow. Hold the object before mod_timer() and drop the reference if mod_timer() reports that the timer was already pending in timer handlers. Apply the same ordering to the proto-unreachable path, which can rearm a transport timer outside the timer handlers without holding the sock lock.
Quoted source text, attributed separately from HOL analysis.