Answer in brief
CVE-2026-31532 records a High severity (CVSS 7.8) vulnerability in can: raw: fix ro->uniq use-after-free in raw_rcv(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (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 7.8. 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), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=514ac99c64b22d83b52dfee3b8becaa69a92bc4a <1de30576a6dfeaaa27ef91fa272e6b9240b6fbd3 || >=514ac99c64b22d83b52dfee3b8becaa69a92bc4a <64c8553decf5a5f2417bd54761ea0a832c56c4ca || >=514ac99c64b22d83b52dfee3b8becaa69a92bc4a <3f43f12fde34737fba091b7e3ab391e14ddbb0be || >=514ac99c64b22d83b52dfee3b8becaa69a92bc4a <5e9cfffad898bbeaafd0ea608a6d267362f050fc || >=514ac99c64b22d83b52dfee3b8becaa69a92bc4a <572f0bf536ebc14f6e7da3d21a85cf076de8358e || >=514ac99c64b22d83b52dfee3b8becaa69a92bc4a <1a0f2de81f7fbdc538fc72d7d74609b79bc83cc0 || >=514ac99c64b22d83b52dfee3b8becaa69a92bc4a <7201a531b9a5ed892bfda5ded9194ef622de8ffa || >=514ac99c64b22d83b52dfee3b8becaa69a92bc4a <34c1741254ff972e8375faf176678a248826fe3a || >=514ac99c64b22d83b52dfee3b8becaa69a92bc4a <a535a9217ca3f2fccedaafb2fddb4c48f27d36dc | 1de30576a6dfeaaa27ef91fa272e6b9240b6fbd3, 64c8553decf5a5f2417bd54761ea0a832c56c4ca, 3f43f12fde34737fba091b7e3ab391e14ddbb0be, 5e9cfffad898bbeaafd0ea608a6d267362f050fc, 572f0bf536ebc14f6e7da3d21a85cf076de8358e, 1a0f2de81f7fbdc538fc72d7d74609b79bc83cc0, 7201a531b9a5ed892bfda5ded9194ef622de8ffa, 34c1741254ff972e8375faf176678a248826fe3a, a535a9217ca3f2fccedaafb2fddb4c48f27d36dc |
| Linux/Linuxgeneric | 4.1 | Not reported |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <* | * |
Published upstream
Apr 23, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 15, 2026
In the Linux kernel, the following vulnerability has been resolved: can: raw: fix ro->uniq use-after-free in raw_rcv() raw_release() unregisters raw CAN receive filters via can_rx_unregister(), but receiver deletion is deferred with call_rcu(). This leaves a window where raw_rcv() may still be running in an RCU read-side critical section after raw_release() frees ro->uniq, leading to a use-after-free of the percpu uniq storage. Move free_percpu(ro->uniq) out of raw_release() and into a raw-specific socket destructor. can_rx_unregister() takes an extra reference to the socket and only drops it from the RCU callback, so freeing uniq from sk_destruct ensures the percpu area is not released until the relevant callbacks have drained. [mkl: applied manually]
Quoted source text, attributed separately from HOL analysis.