AZL-85359
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-85359.json
- JSON Data
- https://api.osv.dev/v1/vulns/AZL-85359
- Upstream
- Published
- 2026-05-01T15:16:48Z
- Modified
- 2026-08-29T05:27:27Z
- Summary
- CVE-2026-43036 affecting package kernel 6.6.150.1-1
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
net: use skbheaderpointer() for TCPv4 GSO frag_off check
Syzbot reported a KMSAN uninit-value warning in gsofeaturescheck() called from netifskbfeatures() [1].
gsofeaturescheck() reads iph->fragoff to decide whether to clear mangleidfeatures. Accessing the IPv4 header via iphdr()/inneriphdr() can rely on skb header offsets that are not always safe for direct dereference on packets injected from PFPACKET paths.
Use skbheaderpointer() for the TCPv4 frag_off check so the header read is robust whether data is already linear or needs copying.
[1] https://syzkaller.appspot.com/bug?extid=1543a7d954d9c6d00407
- References