# CVE-2023-52983: linux: In the Linux kernel, the following vulnerability has been resolved:  block, bfq: fix uaf for bfqq in bic_set_bfqq()...

CVE-2023-52983 is fixed in 20 products on 1 platform, first by ALAS2023-2023-132, released March 11, 2023. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-52983
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0028
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 11, 2023

## Description

In the Linux kernel, the following vulnerability has been resolved:  block, bfq: fix uaf for bfqq in bic_set_bfqq()  After commit 64dc8c732f5c ("block, bfq: fix possible uaf for 'bfqq->bic'"), bic->bfqq will be accessed in bic_set_bfqq(), however, in some context bic->bfqq will be freed, and bic_set_bfqq() is called with the freed bic->bfqq.  Fix the problem by always freeing bfqq after bic_set_bfqq().

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | bpftool amzn 2023 | 6.1.12-17.42.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 |
| Linux | bpftool-debuginfo amzn 2023 | 6.1.12-17.42.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 |
| Linux | kernel amzn 2023 | 6.1.12-17.42.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 |
| Linux | kernel-debuginfo amzn 2023 | 6.1.12-17.42.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 |
| Linux | kernel-debuginfo-common-aarch64 amzn 2023 | 6.1.12-17.42.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 |
| Linux | kernel-debuginfo-common-x86_64 amzn 2023 | 6.1.12-17.42.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 |
| Linux | kernel-devel amzn 2023 | 6.1.12-17.42.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 |
| Linux | kernel-headers amzn 2023 | 6.1.12-17.42.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 |
| Linux | kernel-libbpf amzn 2023 | 6.1.12-17.42.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 |
| Linux | kernel-libbpf-devel amzn 2023 | 6.1.12-17.42.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 |
| Linux | kernel-libbpf-static amzn 2023 | 6.1.12-17.42.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 |
| Linux | kernel-livepatch-6.1.12-17.42 amzn 2023 | 1.0-0.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 |
| Linux | kernel-tools amzn 2023 | 6.1.12-17.42.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 |
| Linux | kernel-tools-debuginfo amzn 2023 | 6.1.12-17.42.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 |
| Linux | kernel-tools-devel amzn 2023 | 6.1.12-17.42.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 |
| Linux | linux Debian 12.15 (bookworm) | 6.1.11-1 | [DEBIAN-CVE-2023-52983](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52983.md) | Mar 27, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.1.11-1 | [DEBIAN-CVE-2023-52983](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52983.md) | Mar 27, 2025 |
| Linux | linux Debian 14 | 6.1.11-1 | [DEBIAN-CVE-2023-52983](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52983.md) | Mar 27, 2025 |
| Linux | perf amzn 2023 | 6.1.12-17.42.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 |
| Linux | perf-debuginfo amzn 2023 | 6.1.12-17.42.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 |
| Linux | python3-perf amzn 2023 | 6.1.12-17.42.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 |
| Linux | python3-perf-debuginfo amzn 2023 | 6.1.12-17.42.amzn2023 | [ALAS2023-2023-132](https://patchblox.com/security/data/fix/linux/alas2023-2023-132.md) | Mar 11, 2023 |

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Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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