Riskcovery

CVE-2026-43481

net-shapers: don't free reply skb after genlmsg_reply()

State
Published
Severity
7.8 High
Published
May 13, 2026
Updated
Aug 5, 2026
Reserved
May 1, 2026

Read the record on cve.org

Description

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.

Scores

CVSSScoreVectorSource
3.17.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLinux

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 4b623f9f0f59652ea71fcb27d60b4c3b65126dbb to before 8738dcc844fff7d0157ee775230e95df3b1884d7Affected
  • 4b623f9f0f59652ea71fcb27d60b4c3b65126dbb to before 83f7b54242d0abbfce35a55c01322f50962ed3eeAffected
  • 4b623f9f0f59652ea71fcb27d60b4c3b65126dbb to before 57885276cc16a2e2b76282c808a4e84cbecb3aaeAffected
LinuxLinux
  • 6.13Affected
  • before 6.13Not affected
  • 6.18.19 through 6.18.*Not affected
  • 6.19.9 through 6.19.*Not affected
  • 7.0 and laterNot affected

References

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