CVE-2022-49413
bfq: Update cgroup information before merging bio
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: bfq: Update cgroup information before merging bio When the process is migrated to a different cgroup (or in case of writeback just starts submitting bios associated with a different cgroup) bfq_merge_bio() can operate with stale cgroup information in bic. Thus the bio can be merged to a request from a different cgroup or it can result in merging of bfqqs for different cgroups or bfqqs of already dead cgroups and causing possible use-after-free issues. Fix the problem by updating cgroup information in bfq_merge_bio().
Timeline
ID reserved
By Linux
Published
- 18 months later
· 18 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| CISA-ADPADP (enrichment) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Analyzed | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.29% · top 78% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Weakness
Affected products
- affected e21b7a0b988772e82e7147e1c659a5afe2ae003c – < da9f3025d595956410ceaab2bea01980d7775948
- affected e21b7a0b988772e82e7147e1c659a5afe2ae003c – < b06691af08b41dfd81052a3362514d9827b44bb1
- affected e21b7a0b988772e82e7147e1c659a5afe2ae003c – < e8821f45612f2e6d9adb9c6ba0fb4184f57692aa
- affected e21b7a0b988772e82e7147e1c659a5afe2ae003c – < d9165200c5627a2cf4408eefabdf0058bdf95e1a
- affected e21b7a0b988772e82e7147e1c659a5afe2ae003c – < 2a1077f17169a6059992a0bbdb330e0abad1e6d9
- affected e21b7a0b988772e82e7147e1c659a5afe2ae003c – < ea591cd4eb270393810e7be01feb8fde6a34fbbe
- affected 4.12
- unaffected < 4.12
- unaffected 5.4.198 – ≤ 5.4.*
- unaffected 5.10.121 – ≤ 5.10.*
- unaffected 5.15.46 – ≤ 5.15.*
- unaffected 5.17.14 – ≤ 5.17.*
- unaffected 5.18.3 – ≤ 5.18.*
- unaffected 5.19 – ≤ *
References (6)
- https://git.kernel.org/stable/c/da9f3025d595956410ceaab2bea01980d7775948 (opens in a new tab)
- https://git.kernel.org/stable/c/b06691af08b41dfd81052a3362514d9827b44bb1 (opens in a new tab)
- https://git.kernel.org/stable/c/e8821f45612f2e6d9adb9c6ba0fb4184f57692aa (opens in a new tab)
- https://git.kernel.org/stable/c/d9165200c5627a2cf4408eefabdf0058bdf95e1a (opens in a new tab)
- https://git.kernel.org/stable/c/2a1077f17169a6059992a0bbdb330e0abad1e6d9 (opens in a new tab)
- https://git.kernel.org/stable/c/ea591cd4eb270393810e7be01feb8fde6a34fbbe (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-49413)Record last updated .