DEBIAN-CVE-2026-31532
Record from OSV · Published April 23, 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]
Fixed versions
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| Package | Ecosystem | Fixed in |
|---|---|---|
| linux | Debian:13 | 6.12.85-1 |
| linux | Debian:14 | 6.19.14-1 |
| linux | Debian:12 | 6.1.176-1 |
Risk scores
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Debian:13 | linux | 6.12.85-1~bpo12+1, 6.12.74-2~bpo12+1, 6.12.74-2 |
| Debian:14 | linux | 6.12.73-1, 6.12.73-1~bpo12+1, 6.12.74-1 |
| Debian:12 | linux | 6.1.153-1, 6.1.158-1, 6.1.159-1 |
Timeline
- Apr 23, 2026 CVE Published
- Oct 23, 2026 CVE Updated
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