CVE-2026-97919

CVE CVE-2026-97919EUVD EUVD-2026-86773Published 2026-09-25T10:22:39.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: tracing: Take the reference before publishing the named histogram trigger event_hist_trigger_named_init() puts the trigger on the global named_triggers list and only then takes the reference on the trigger it shares its histogram with: data->ref++; save_named_trigger(data->named_data->name, data); ret = event_hist_trigger_init(data->named_data); if (ret < 0) { kfree(data->cmd_ops); data->cmd_ops = &trigger_hist_cmd; } return ret; event_hist_trigger_init() fails when alloc_hist_pad() cannot allocate, and nothing takes the trigger back off the list on the way out. event_hist_trigger_parse() frees it, and the next lookup by name reads the freed object: BUG: KASAN: slab-use-after-free in find_named_trigger+0xac/0xc0 Read of size 8 at addr ffff888009346860 by task init/1 find_named_trigger+0xac/0xc0 hist_register_trigger+0xc1/0xa00 event_hist_trigger_parse+0x3146/0x6af0 event_trigger_write+0xce/0x160 Freed by task 67: kfree+0x154/0x420 trigger_kthread_fn+0xfd/0x160 Do the reference first and publish once it has succeeded, so that nothing which can fail runs after the trigger becomes findable.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux 740dab2338f70d93aa8235db5a9541d846d7b21c; 7ab0fc61ce73040f89b12d76a8279995ec283541 <0fe23b8eaba0d3372c66b7b31204408da0715edc; 6.6.94 <6.7; 7ab0fc61ce73040f89b12d76a8279995ec283541 <2ffaade3611bd9501bc0b9d5d19fc75bfee7a16b; 6.15.3 <6.16; patch: 7.3-rc3; 7ab0fc61ce73040f89b12d76a8279995ec283541 <91c15cdda6033e2439f5975b938754152f3d6e38; patch: 0; patch: 7.2.7; e53a8dcd36b9ebc9229450eb594ae20e0b2ae0fd; 6.16; ac7ab38c271ba2edaeb0dc35b200ec13339776ae; 6.12.34 <6.13; patch: 6.18.53

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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