01 Record
CVE-2023-6531
Kernel: gc's deletion of an skb races with unix_stream_read_generic() leading to uaf
HighPUBLISHEDCNA: redhat
CNA base score7.0 CVSS v3.xCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
02 Description
Kernel: gc's deletion of an skb races with unix_stream_read_generic() leading to uaf
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 0.22% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 12.9% of scored records. A rank, not a probability.
- NVD base score
- 7.0 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-08-06.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2024-01-21 10:01Z2 YR AGO
- Last updated
- 2026-08-06 19:12Z2 MO AGO
- Reserved
- 2023-12-05
- Assigning CNA
- redhat
- Record state
- PUBLISHED
- Severity
- High (CVSS 7.0)
- CNA CVSS vector
- CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')Class
- Data version
- 5.2
- Document digest
- 632f3fdbc4b5f02a1efe2eff70b3d5dfd887b886f7c1022eab35c16588df4f88
05 Affected products
VendorProductVersionsPlatforms
06 References
- access.redhat.comRHSA-2024:2394https://access.redhat.com/errata/RHSA-2024:2394
- access.redhat.comhttps://access.redhat.com/security/cve/CVE-2023-6531
- bugzilla.redhat.comRHBZ#2253034https://bugzilla.redhat.com/show_bug.cgi?id=2253034
- lore.kernel.orghttps://lore.kernel.org/all/c716c88321939156909cfa1bd8b0faaf1c804103.1701868795.git.asml.silence@gmail.com/
- packetstormsecurity.comhttp://packetstormsecurity.com/files/176533/Linux-Broken-Unix-GC-Interaction-Use-After-Free.html
- lists.debian.orghttps://lists.debian.org/debian-lts-announce/2024/01/msg00005.html
07 Fixed in
AlmaLinux 9
- bpftool Fixed in 7.3.0-427.13.1.el9_4
- kernel Fixed in 5.14.0-427.13.1.el9_4
- kernel-64k Fixed in 5.14.0-427.13.1.el9_4
- kernel-64k-core Fixed in 5.14.0-427.13.1.el9_4
- kernel-64k-debug Fixed in 5.14.0-427.13.1.el9_4
- kernel-64k-debug-core Fixed in 5.14.0-427.13.1.el9_4
- kernel-64k-debug-devel Fixed in 5.14.0-427.13.1.el9_4
- kernel-64k-debug-devel-matched Fixed in 5.14.0-427.13.1.el9_4
- kernel-64k-debug-modules Fixed in 5.14.0-427.13.1.el9_4
- kernel-64k-debug-modules-core Fixed in 5.14.0-427.13.1.el9_4
- kernel-64k-debug-modules-extra Fixed in 5.14.0-427.13.1.el9_4
- kernel-64k-devel Fixed in 5.14.0-427.13.1.el9_4
- kernel-64k-devel-matched Fixed in 5.14.0-427.13.1.el9_4
- kernel-64k-modules Fixed in 5.14.0-427.13.1.el9_4
- kernel-64k-modules-core Fixed in 5.14.0-427.13.1.el9_4
- kernel-64k-modules-extra Fixed in 5.14.0-427.13.1.el9_4
- kernel-abi-stablelists Fixed in 5.14.0-427.13.1.el9_4
- kernel-core Fixed in 5.14.0-427.13.1.el9_4
- kernel-cross-headers Fixed in 5.14.0-427.13.1.el9_4
- kernel-debug Fixed in 5.14.0-427.13.1.el9_4
- kernel-debug-core Fixed in 5.14.0-427.13.1.el9_4
- kernel-debug-devel Fixed in 5.14.0-427.13.1.el9_4
- kernel-debug-devel-matched Fixed in 5.14.0-427.13.1.el9_4
- kernel-debug-modules Fixed in 5.14.0-427.13.1.el9_4
- kernel-debug-modules-core Fixed in 5.14.0-427.13.1.el9_4
- kernel-debug-modules-extra Fixed in 5.14.0-427.13.1.el9_4
- kernel-debug-uki-virt Fixed in 5.14.0-427.13.1.el9_4
- kernel-devel Fixed in 5.14.0-427.13.1.el9_4
- kernel-devel-matched Fixed in 5.14.0-427.13.1.el9_4
- kernel-doc Fixed in 5.14.0-427.13.1.el9_4
- kernel-headers Fixed in 5.14.0-427.13.1.el9_4
- kernel-modules Fixed in 5.14.0-427.13.1.el9_4
- kernel-modules-core Fixed in 5.14.0-427.13.1.el9_4
- kernel-modules-extra Fixed in 5.14.0-427.13.1.el9_4
- kernel-rt Fixed in 5.14.0-427.13.1.el9_4
- kernel-rt-core Fixed in 5.14.0-427.13.1.el9_4
- kernel-rt-debug Fixed in 5.14.0-427.13.1.el9_4
- kernel-rt-debug-core Fixed in 5.14.0-427.13.1.el9_4
- kernel-rt-debug-devel Fixed in 5.14.0-427.13.1.el9_4
- kernel-rt-debug-modules Fixed in 5.14.0-427.13.1.el9_4
22 further packages in AlmaLinux 9 not shown (first 40 listed).
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 9
- bpftool Fixed in 7.3.0-427.13.1.el9_4
- kernel Fixed in 5.14.0-427.13.1.el9_4
- kernel-64k Fixed in 5.14.0-427.13.1.el9_4
- kernel-64k-core Fixed in 5.14.0-427.13.1.el9_4
- kernel-64k-debug Fixed in 5.14.0-427.13.1.el9_4
- kernel-64k-debug-core Fixed in 5.14.0-427.13.1.el9_4
- kernel-64k-debug-devel Fixed in 5.14.0-427.13.1.el9_4
- kernel-64k-debug-devel-matched Fixed in 5.14.0-427.13.1.el9_4
- kernel-64k-debug-modules Fixed in 5.14.0-427.13.1.el9_4
- kernel-64k-debug-modules-core Fixed in 5.14.0-427.13.1.el9_4
- kernel-64k-debug-modules-extra Fixed in 5.14.0-427.13.1.el9_4
- kernel-64k-devel Fixed in 5.14.0-427.13.1.el9_4
- kernel-64k-devel-matched Fixed in 5.14.0-427.13.1.el9_4
- kernel-64k-modules Fixed in 5.14.0-427.13.1.el9_4
- kernel-64k-modules-core Fixed in 5.14.0-427.13.1.el9_4
- kernel-64k-modules-extra Fixed in 5.14.0-427.13.1.el9_4
- kernel-abi-stablelists Fixed in 5.14.0-427.13.1.el9_4
- kernel-core Fixed in 5.14.0-427.13.1.el9_4
- kernel-cross-headers Fixed in 5.14.0-427.13.1.el9_4
- kernel-debug Fixed in 5.14.0-427.13.1.el9_4
- kernel-debug-core Fixed in 5.14.0-427.13.1.el9_4
- kernel-debug-devel Fixed in 5.14.0-427.13.1.el9_4
- kernel-debug-devel-matched Fixed in 5.14.0-427.13.1.el9_4
- kernel-debug-modules Fixed in 5.14.0-427.13.1.el9_4
- kernel-debug-modules-core Fixed in 5.14.0-427.13.1.el9_4
- kernel-debug-modules-extra Fixed in 5.14.0-427.13.1.el9_4
- kernel-debug-uki-virt Fixed in 5.14.0-427.13.1.el9_4
- kernel-devel Fixed in 5.14.0-427.13.1.el9_4
- kernel-devel-matched Fixed in 5.14.0-427.13.1.el9_4
- kernel-doc Fixed in 5.14.0-427.13.1.el9_4
- kernel-headers Fixed in 5.14.0-427.13.1.el9_4
- kernel-modules Fixed in 5.14.0-427.13.1.el9_4
- kernel-modules-core Fixed in 5.14.0-427.13.1.el9_4
- kernel-modules-extra Fixed in 5.14.0-427.13.1.el9_4
- kernel-rt Fixed in 5.14.0-427.13.1.el9_4
- kernel-rt-core Fixed in 5.14.0-427.13.1.el9_4
- kernel-rt-debug Fixed in 5.14.0-427.13.1.el9_4
- kernel-rt-debug-core Fixed in 5.14.0-427.13.1.el9_4
- kernel-rt-debug-devel Fixed in 5.14.0-427.13.1.el9_4
- kernel-rt-debug-modules Fixed in 5.14.0-427.13.1.el9_4
22 further packages in CloudLinux 9 not shown (first 40 listed).
Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- linux Fixed in 6.1.69-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- linux Fixed in 6.6.8-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- linux Fixed in 6.6.8-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- linux-hwe-edge No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- linux-aws-5.0 No fix yet
- linux-aws-5.3 No fix yet
- linux-azure No fix yet
- linux-azure-5.3 No fix yet
- linux-azure-edge No fix yet
- linux-gcp No fix yet
- linux-gcp-5.3 No fix yet
- linux-gke-4.15 No fix yet
- linux-gke-5.4 No fix yet
- linux-gkeop-5.4 No fix yet
- linux-hwe No fix yet
- linux-hwe-edge No fix yet
- linux-oem No fix yet
- linux-oracle-5.0 No fix yet
- linux-oracle-5.3 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- linux-aws-5.11 No fix yet
- linux-aws-5.13 No fix yet
- linux-aws-5.8 No fix yet
- linux-azure-5.11 No fix yet
- linux-azure-5.13 No fix yet
- linux-azure-5.8 No fix yet
- linux-azure-fde No fix yet
- linux-gcp-5.11 No fix yet
- linux-gcp-5.13 No fix yet
- linux-gcp-5.8 No fix yet
- linux-gke No fix yet
- linux-gke-5.15 No fix yet
- linux-hwe-5.11 No fix yet
- linux-hwe-5.13 No fix yet
- linux-hwe-5.8 No fix yet
- linux-intel-5.13 No fix yet
- linux-oem-5.10 No fix yet
- linux-oem-5.13 No fix yet
- linux-oem-5.14 No fix yet
- linux-oem-5.6 No fix yet
- linux-oracle-5.11 No fix yet
- linux-oracle-5.13 No fix yet
- linux-oracle-5.8 No fix yet
- linux-raspi2 No fix yet
- linux-riscv No fix yet
- linux-riscv-5.11 No fix yet
- linux-riscv-5.8 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- linux-allwinner-5.19 No fix yet
- linux-aws-5.19 No fix yet
- linux-aws-6.2 No fix yet
- linux-aws-6.5 No fix yet
- linux-azure-5.19 No fix yet
- linux-azure-6.2 No fix yet
- linux-azure-6.5 No fix yet
- linux-azure-fde-5.19 No fix yet
- linux-azure-fde-6.2 No fix yet
- linux-gcp-5.19 No fix yet
- linux-gcp-6.2 No fix yet
- linux-gcp-6.5 Fixed in 6.5.0-1013.13~22.04.1
- linux-hwe-5.19 No fix yet
- linux-hwe-6.2 No fix yet
- linux-hwe-6.5 Fixed in 6.5.0-17.17~22.04.1
- linux-intel-iot-realtime No fix yet
- linux-lowlatency-hwe-5.19 No fix yet
- linux-lowlatency-hwe-6.2 No fix yet
- linux-lowlatency-hwe-6.5 Fixed in 6.5.0-17.17.1.1.1~22.04.1
- linux-nvidia-6.2 No fix yet
- linux-nvidia-6.5 Fixed in 6.5.0-1014.14
- linux-oem-5.17 No fix yet
- linux-oem-6.0 No fix yet
- linux-oem-6.1 Fixed in 6.1.0-1033.33
- linux-oem-6.5 Fixed in 6.5.0-1014.15
- linux-oracle-6.5 No fix yet
- linux-realtime No fix yet
- linux-riscv No fix yet
- linux-riscv-5.19 No fix yet
- linux-starfive-5.19 No fix yet
- linux-starfive-6.2 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- linux-raspi Fixed in 6.7.0-1001.1
- linux-raspi-realtime No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.