block, bfq: fix possible uaf for 'bfqq->bic'

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

• linux linux kernel5.4.198 and later · before 5.5
• linux linux kernel5.10.121 and later · before 5.10.175
• linux linux kernel5.15.46 and later · before 5.15.86
• linux linux kernel5.17.14 and later · before 5.18
• linux linux kernel5.18.3 and later · before 6.0.16
• linux linux kernel6.1 and later · before 6.1.2

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

• Linux Linux

  • 31326bf551269fb9bafa84ca99172b8340e5d8f8, 43c51b86dbe551cff5d39b88aa2f41d29479f9c4, 8615f6c0c9e7cf0ca90b6b5408784d797cbe5621, 5.19affected
  • 4dfc12f8c94c8052e975060f595938f75e8b7165 and later · before 5533742c7cb1bc9b1f0bf401cc397d44a3a9e07aaffected · git
  • 81b7d0c717a487ec50e2924a773ff501ee40f0d5 and later · before 094f3d9314d67691cb21ba091c1b528f6e3c4893affected · git
  • 3bc5e683c67d94bd839a1da2e796c15847b51b69 and later · before b22fd72bfebda3956efc4431b60ddfc0a51e03e0affected · git
  • 3bc5e683c67d94bd839a1da2e796c15847b51b69 and later · before 761564d93c8265f65543acf0a576b32d66bfa26aaffected · git
  • 3bc5e683c67d94bd839a1da2e796c15847b51b69 and later · before 64dc8c732f5c2b406cc752e6aaa1bd5471159cabaffected · git
  • 5.10.121 and later · before 5.10.175affected · semver
  • 5.15.46 and later · before 5.15.86affected · semver
  • 5.4.198 and later · before 5.5affected · semver
  • 5.17.14 and later · before 5.18affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Other highest-scoring records for the same primary product.

• CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
  89Now
• CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
  85Now
• CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV
  83Now
• CVE-2019-13272In the Linux kernel before 5.1.17, ptrace_link in kernel/ptrace.c mishandles the recording of the credentials of a process that wants to creKEV
  77This week
• CVE-2013-6282The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the v6k and v7 ARM platforms do not validate certain addKEV
  77This week
• CVE-2013-2094The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9 uses an incorrect integer data type, which allows loKEV
  77This week

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1free(dev->buf);2/* ... another thread is still running ... */3process(dev->buf);

1lock(&dev->lock);2free(dev->buf);3dev->buf = NULL;4unlock(&dev->lock);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.