CVE-2026-43481
7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved:
net-shapers: don't free reply skb after genlmsg_reply()
genlmsg_reply() hands the reply skb to netlink, and netlink_unicast() consumes it on all return paths, whether the skb is queued successfully or freed on an error path.
net_shaper_nl_get_doit() and net_shaper_nl_cap_get_doit() currently jump to free_msg after genlmsg_reply() fails and call nlmsg_free(msg), which can hit the same skb twice.
Return the genlmsg_reply() error directly and keep free_msg only for pre-reply failures.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 4b623f9f0f59652ea71fcb27d60b4c3b65126dbb < 8738dcc844fff7d0157ee775230e95df3b1884d7 | affected |
| Linux | Linux | 4b623f9f0f59652ea71fcb27d60b4c3b65126dbb < 83f7b54242d0abbfce35a55c01322f50962ed3ee | affected |
| Linux | Linux | 4b623f9f0f59652ea71fcb27d60b4c3b65126dbb < 57885276cc16a2e2b76282c808a4e84cbecb3aae | affected |
| Linux | Linux | 6.13 | affected |
| Linux | Linux | 0 < 6.13 | unaffected |
| Linux | Linux | 6.18.19 <= 6.18.* | unaffected |
| Linux | Linux | 6.19.9 <= 6.19.* | unaffected |
| Linux | Linux | 7.0 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/8738dcc844fff7d0157ee775230e95df3b1884d7
- https://git.kernel.org/stable/c/83f7b54242d0abbfce35a55c01322f50962ed3ee
- https://git.kernel.org/stable/c/57885276cc16a2e2b76282c808a4e84cbecb3aae
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