AZL-96495
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-96495.json
- JSON Data
- https://api.osv.dev/v1/vulns/AZL-96495
- Upstream
- Published
- 2026-08-15T13:18:00Z
- Modified
- 2026-08-30T05:26:50Z
- Summary
- CVE-2026-74550 affecting package kernel 6.6.150.1-1
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
net: do not send ICMP/NDISC Redirects when peer allocation fails
When inetgetpeerv4() or inetgetpeerv6() fails to allocate a peer entry under memory pressure or tree size caps, redirect handlers previously fell back to sending un-rate-limited ICMP/NDISC Redirect messages.
In IPv4, iprtsendredirect() called icmpsend() directly when peer == NULL. In IPv6, ip6forward() and ndiscsendredirect() passed a NULL peer into inetpeerxrlimallow(), which returned true when peer == NULL.
Because ICMP/NDISC Redirects are not part of the default global rate limit mask (sysctlicmpratemask), sending redirects when peer == NULL creates an un-rate-limited ICMP packet storm.
Fix this by failing closed in iprtsendredirect(), ip6forward(), and ndiscsendredirect() when peer is NULL.
- References