The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applicationsUpgrade Centos:8
kernel-debug-devel
to version 0:4.18.0-553.22.1.el8_10 or higher.
Note: Versions mentioned in the description apply only to the upstream kernel-debug-devel
package and not the kernel-debug-devel
package as distributed by Centos
.
See How to fix?
for Centos:8
relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
block: don't call rq_qos_ops->done_bio if the bio isn't tracked
rq_qos framework is only applied on request based driver, so:
rq_qos_done_bio() needn't to be called for bio based driver
rq_qos_done_bio() needn't to be called for bio which isn't tracked, such as bios ended from error handling code.
Especially in bio_endio():
request queue is referred via bio->bi_bdev->bd_disk->queue, which may be gone since request queue refcount may not be held in above two cases
q->rq_qos may be freed in blk_cleanup_queue() when calling into __rq_qos_done_bio()
Fix the potential kernel panic by not calling rq_qos_ops->done_bio if the bio isn't tracked. This way is safe because both ioc_rqos_done_bio() and blkcg_iolatency_done_bio() are nop if the bio isn't tracked.