kernel: net scheduler use-after-free information disclosure vulnerability
Published Oct 19, 2022
5.5
MEDIUMCVSS 3.1
EPSS 0.48%
Description
A flaw was found in the Linux kernel’s networking code. A use-after-free was found in the way the sch_sfb enqueue function used the socket buffer (SKB) cb field after the same SKB had been enqueued (and freed) into a child qdisc. This flaw allows a local, unprivileged user to crash the system, causing a denial of service.
Affected products
- Vendor n/a Product Linux Kernel Defaultn/a
- Version Fixed in kernel v6.0StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | Linux Kernel | n/a |
|
Configuration 1
- ≥ 2.6.39 · ≤ 5.19
- 6.0
- 6.0
- 6.0
- 6.0
Configuration 2
- 10.0
No data.
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
kernel
Not affected
Red Hat Enterprise Linux 7
kernel-rt
Not affected
Red Hat Enterprise Linux 8
kernel
Not affected
Red Hat Enterprise Linux 8
kernel-rt
Not affected
Red Hat Enterprise Linux 9
kernel
Not affected
Red Hat Enterprise Linux 9
kernel-rt
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise Linux 9 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 9 | kernel-rt | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat mitigation
To mitigate this issue, prevent module sch_sfb from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically. If the sch_sfb module is enabled, then don't install sch_cake as a child qdisc of sch_sfb.
References (9)
- https://access.redhat.com/security/cve/CVE-2022-3586 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2124475 Issue Tracking
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2022-42950 Advisory
- https://github.com/torvalds/linux/commit/9efd23297cca PatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html mailing-listMailing ListThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2022-3586
- https://www.cve.org/CVERecord?id=CVE-2022-3586
- https://www.zerodayinitiative.com/advisories/ZDI-CAN-18231/
- https://www.zerodayinitiative.com/advisories/upcoming/ Third Party AdvisoryVDB Entry
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2022-3586 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2124475 | Issue Tracking | |
| https://euvd.enisa.europa.eu/vulnerability/EUVD-2022-42950 | Advisory | |
| https://github.com/torvalds/linux/commit/9efd23297cca | PatchThird Party Advisory | |
| https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html | mailing-listMailing ListThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2022-3586 | ||
| https://www.cve.org/CVERecord?id=CVE-2022-3586 | ||
| https://www.zerodayinitiative.com/advisories/ZDI-CAN-18231/ | ||
| https://www.zerodayinitiative.com/advisories/upcoming/ | Third Party AdvisoryVDB Entry |
Change history (0)
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