7.8
High
CVE-2025-21758 In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: add RCU protection to mld_newpack()…
Description
In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: add RCU protection to mld_newpack() mld_newpack() can be called without RTNL or RCU being held. Note that we no longer can use sock_alloc_send_skb() because ipv6.igmp_sk uses GFP_KERNEL allocations which can sleep. Instead use alloc_skb() and charge the net->ipv6.igmp_sk socket under RCU protection.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux 6.14 | earliest → < 6.14 | 6.14 |
| Linux 6.13 | earliest → < 6.13.4 | 6.13.4 |
| Linux 6.12 | earliest → < 6.12.16 | 6.12.16 |
| Linux 6.6 | earliest → < 6.6.79 | 6.6.79 |
| Linux 6.1 | earliest → < 6.1.129 | 6.1.129 |
| Linux 5.15 | earliest → < 5.15.179 | 5.15.179 |
| Linux | 2.6.26 | No fix stated |
| SIMATIC S7-1500 CPU 1518-4 PN/DP MFP 3.1 | 3.1.7 → latest | No fix stated |
| SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP 3.1 | 3.1.7 → latest | No fix stated |
Show the 2 other branches Hide the 2 other branches
| Product | Affected versions | Fixed in |
|---|---|---|
| SIPLUS S7-1500 CPU 1518-4 PN/DP MFP 3.1 | 3.1.7 → latest | No fix stated |
| SIMATIC S7-1500 TM MFP - GNU/Linux subsystem | Versions not published |
Other CVEs of Linux
The 18286 CVEs of Linux →
CVE-2026-100082
xen-blkback: Avoid UAF when reading I/O statistics
Not rated
CVE-2026-100081
xen-netback: defer xenvif_mcast_addr_list_free()
Not rated
CVE-2026-100080
xen-netback: Fix UAF when reading statistics data
Not rated
CVE-2026-99270
tcp: Fix potential UAF in reqsk_timer_handler().
8.1
High