CVE-2023-53000
In the Linux kernel, the following vulnerability has been resolved: netlink: prevent potential spectre v1 gadgets Most netlink attributes are parsed and validated from __nla_validate_parse() or validate_nla() u16 type = nla_type(nla); if (type == 0 ||…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.21%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In the Linux kernel, the following vulnerability has been resolved: netlink: prevent potential spectre v1 gadgets Most netlink attributes are parsed and validated from __nla_validate_parse() or validate_nla() u16 type = nla_type(nla); if (type == 0 || type > maxtype) { /* error or continue */ } @type is then used as an array index and can be used as a Spectre v1 gadget. array_index_nospec() can be used to prevent leaking content of kernel memory to malicious users. This should take care of vast majority of netlink uses, but an audit is needed to take care of others where validation is not yet centralized in core netlink functions.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.21% probability · 12th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-129
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/3e5082b1c66c7783fbcd79b5b178573230e528ffPatch
- https://git.kernel.org/stable/c/41b74e95f297ac360ca7ed6bf200100717cb6c45Patch
- https://git.kernel.org/stable/c/539ca5dcbc91134bbe2c45677811c31d8b030d2dPatch
- https://git.kernel.org/stable/c/992e4ff7116a77968039277b5d6aaa535c2f2184Patch
- https://git.kernel.org/stable/c/f0950402e8c76e7dcb08563f1b4e8000fbc62455Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.