CVE-2023-4623
published 2023-09-06CVE-2023-4623: A use-after-free vulnerability in the Linux kernel's net/sched: sch_hfsc (HFSC qdisc traffic control) component can be exploited to achieve local privilege…
high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
A use-after-free vulnerability in the Linux kernel's net/sched: sch_hfsc (HFSC qdisc traffic control) component can be exploited to achieve local privilege escalation.
If a class with a link-sharing curve (i.e. with the HFSC_FSC flag set) has a parent without a link-sharing curve, then init_vf() will call vttree_insert() on the parent, but vttree_remove() will be skipped in update_vf(). This leaves a dangling pointer that can cause a use-after-free.
We recommend upgrading past commit b3d26c5702c7d6c45456326e56d2ccf3f103e60f.
Affected
27 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | debian_linux | — | — |
| debian | linux | < linux 6.1.55-1 (bookworm) | linux 6.1.55-1 (bookworm) |
| linux | kernel | >= 2.6.12 < 6.6 | 6.6 |
| linux | linux_kernel | >= 0 < 5.10.197-1 | 5.10.197-1 |
| linux | linux_kernel | >= 0 < 6.1.55-1 | 6.1.55-1 |
| linux | linux_kernel | >= 0 < 6.5.3-1 | 6.5.3-1 |
| linux | linux_kernel | >= 0 < 6.5.3-1 | 6.5.3-1 |
| linux | linux_kernel | >= 0 < 5.4.0-165.182 | 5.4.0-165.182 |
| linux | linux_kernel | >= 0 < 5.15.0-87.97 | 5.15.0-87.97 |
| linux | linux_kernel | >= 0 < 3.13.0-194.245 | 3.13.0-194.245 |
| linux | linux_kernel | >= 0 < 4.4.0-246.280 | 4.4.0-246.280 |
| linux | linux_kernel | >= 0 < 4.15.0-219.230 | 4.15.0-219.230 |
| linux | linux_kernel | >= 0 < 5.4.0-165.182 | 5.4.0-165.182 |
| linux | linux_kernel | >= 0 < 5.15.0-87.97 | 5.15.0-87.97 |
| linux | linux_kernel | >= 2.6.12 < 4.14.327 | 4.14.327 |
| linux | linux_kernel | >= 4.15 < 4.19.295 | 4.19.295 |
| linux | linux_kernel | >= 4.20 < 5.4.257 | 5.4.257 |
| linux | linux_kernel | >= 5.11 < 5.15.132 | 5.15.132 |
| linux | linux_kernel | >= 5.16 < 6.1.53 | 6.1.53 |
| linux | linux_kernel | >= 5.5 < 5.10.195 | 5.10.195 |
| linux | linux_kernel | >= 6.2 < 6.4.16 | 6.4.16 |
| linux | linux_kernel | >= 6.5 < 6.5.3 | 6.5.3 |
| msrc | cbl2_kernel_5.15.135.1-2_on_cbl_mariner_2.0 | — | — |
| paloalto | pan-os | — | — |
| ubuntu | linux-gcp-5.15 | — | — |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv7.8HIGH