CVE-2026-46047
In the Linux kernel, the following vulnerability has been resolved: net: qrtr: ns: Fix use-after-free in driver remove() In the remove callback, if a packet arrives after destroy_workqueue() is called, but before sock_release(), the qrtr_ns_data_ready()…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.13%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In the Linux kernel, the following vulnerability has been resolved: net: qrtr: ns: Fix use-after-free in driver remove() In the remove callback, if a packet arrives after destroy_workqueue() is called, but before sock_release(), the qrtr_ns_data_ready() callback will try to queue the work, causing use-after-free issue. Fix this issue by saving the default 'sk_data_ready' callback during qrtr_ns_init() and use it to replace the qrtr_ns_data_ready() callback at the start of remove(). This ensures that even if a packet arrives after destroy_workqueue(), the work struct will not be dereferenced. Note that it is also required to ensure that the RX threads are completed before destroying the workqueue, because the threads could be using the qrtr_ns_data_ready() callback.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.13% probability · 3th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/0f313eb6a8f6dffa491373cf3afab979fa1c02f4Patch
- https://git.kernel.org/stable/c/2e127ceb1c415e246076d8e09e23e443a7a2038fPatch
- https://git.kernel.org/stable/c/4ae0bd51bf7079e9c2a06b5de0ae04ba70d10167Patch
- https://git.kernel.org/stable/c/65168712c216584ff482a7d1a67589f2079b2634Patch
- https://git.kernel.org/stable/c/7809fea20c9404bfcfa6112ec08d1fe1d3520bebPatch
- https://git.kernel.org/stable/c/db3c60ec772de30acae92d560dfcc5258e58dbe8Patch
- https://git.kernel.org/stable/c/dff081c3602f2fd810f69ef47945a226980dd05dPatch
- https://git.kernel.org/stable/c/f96779e916576e81430ebb326baff6e433fef8aePatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.