CVE-2022-49492

Summary

In the Linux kernel, the following vulnerability has been resolved:

nvme-pci: fix a NULL pointer dereference in nvme_alloc_admin_tags

In nvme_alloc_admin_tags, the admin_q can be set to an error (typically -ENOMEM) if the blk_mq_init_queue call fails to set up the queue, which is checked immediately after the call. However, when we return the error message up the stack, to nvme_reset_work the error takes us to nvme_remove_dead_ctrl() nvme_dev_disable() nvme_suspend_queue(&dev->queues[0]).

Here, we only check that the admin_q is non-NULL, rather than not an error or NULL, and begin quiescing a queue that never existed, leading to bad / NULL pointer dereference.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux35b489d32fcc37e8735f41aa794b24cf9d1e74f5 < 8321b17789f614414206af07e17ce4751c95dc76affected
LinuxLinux35b489d32fcc37e8735f41aa794b24cf9d1e74f5 < 9e649471b396fa0139d53919354ce1eace9b9a24affected
LinuxLinux35b489d32fcc37e8735f41aa794b24cf9d1e74f5 < 8da2b7bdb47e94bbc4062a3978c708926bcb022caffected
LinuxLinux35b489d32fcc37e8735f41aa794b24cf9d1e74f5 < f76729662650cd7bc8f8194e057af381370349a7affected
LinuxLinux35b489d32fcc37e8735f41aa794b24cf9d1e74f5 < af98940dd33c9f9e1beb4f71c0a39260100e2a65affected
LinuxLinux35b489d32fcc37e8735f41aa794b24cf9d1e74f5 < 906c81dba8ee8057523859b5e1a2479e9fd34860affected
LinuxLinux35b489d32fcc37e8735f41aa794b24cf9d1e74f5 < 7a28556082d1fbcbc599baf1c24252dfc73efefcaffected
LinuxLinux35b489d32fcc37e8735f41aa794b24cf9d1e74f5 < 54a4c1e47d1b2585e74920399455bd9abbfb2bd7affected
LinuxLinux35b489d32fcc37e8735f41aa794b24cf9d1e74f5 < da42761181627e9bdc37d18368b827948a583929affected
LinuxLinux3.19affected
LinuxLinux0 < 3.19unaffected
LinuxLinux4.9.318 <= 4.9.*unaffected
LinuxLinux4.14.283 <= 4.14.*unaffected
LinuxLinux4.19.247 <= 4.19.*unaffected
LinuxLinux5.4.198 <= 5.4.*unaffected
LinuxLinux5.10.121 <= 5.10.*unaffected
LinuxLinux5.15.46 <= 5.15.*unaffected
LinuxLinux5.17.14 <= 5.17.*unaffected
LinuxLinux5.18.3 <= 5.18.*unaffected
LinuxLinux5.19 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References