CVE-2022-33743
network backend may cause Linux netfront to use freed SKBs While adding logic to support XDP (eXpress Data Path), a code label was moved in a way allowing for SKBs having references (pointers) retained for further processing to nevertheless be freed.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.35%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
network backend may cause Linux netfront to use freed SKBs While adding logic to support XDP (eXpress Data Path), a code label was moved in a way allowing for SKBs having references (pointers) retained for further processing to nevertheless be freed.
- 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
- 0.35% probability · 29th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel · xen/xen · debian/debian linux
- Source
- security@xen.org
References
- http://www.openwall.com/lists/oss-security/2022/07/05/5Mailing List, Patch, Third Party Advisory
- http://xenbits.xen.org/xsa/advisory-405.htmlPatch, Vendor Advisory
- https://www.debian.org/security/2022/dsa-5191Third Party Advisory
- https://xenbits.xenproject.org/xsa/advisory-405.txtVendor Advisory
- http://www.openwall.com/lists/oss-security/2022/07/05/5Mailing List, Patch, Third Party Advisory
- http://xenbits.xen.org/xsa/advisory-405.htmlPatch, Vendor Advisory
- https://www.debian.org/security/2022/dsa-5191Third Party Advisory
- https://xenbits.xenproject.org/xsa/advisory-405.txtVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.