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CVE-2025-21728

bpf: Send signals asynchronously if !preemptible

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.4.291, 5.6, 5.10.235, 5.15.179, 6.1.129, and 3 more
None on Exploit-DB, Metasploit or GitHub

Summary

In the Linux kernel, the following vulnerability has been resolved: bpf: Send signals asynchronously if !preemptible BPF programs can execute in all kinds of contexts and when a program running in a non-preemptible context uses the bpf_send_signal() kfunc, it will cause issues because this kfunc can sleep. Change `irqs_disabled()` to `!preemptible()`.

Timeline

  1. CVE published
  2. Record last updated

Affected versions

  • Linux Linux

    From fd29a0242f86b2d95ad666aa9f92a3d0f7bfdab6 · fixed in feba1308bc5e8e04cee751d39fae8a9b407a9034; From 1bc7896e9ef44fd77858b3ef0b8a6840be3a4494 · fixed in ce51eab2070e295d298f42a2f1db269cd1b56d55; From 1bc7896e9ef44fd77858b3ef0b8a6840be3a4494 · fixed in e306eaaa3d78b462db5f5b11e0171f9d2b6ca3f4; From 1bc7896e9ef44fd77858b3ef0b8a6840be3a4494 · fixed in be42a09fe898635b0093c0c8dac1bfabe225c240; From 1bc7896e9ef44fd77858b3ef0b8a6840be3a4494 · fixed in eeef8e65041a031bd8a747a392c14b76a123a12c; From 1bc7896e9ef44fd77858b3ef0b8a6840be3a4494 · fixed in 78b97783496b454435639937db3303e900a24d3f; From 1bc7896e9ef44fd77858b3ef0b8a6840be3a4494 · fixed in 092fc76b7ab4163e008f9cde596a58dad2108260; From 1bc7896e9ef44fd77858b3ef0b8a6840be3a4494 · fixed in 87c544108b612512b254c8f79aa5c0a8546e2cc4; From 5.4.33 · fixed in 5.4.291; From 5.5.18 · fixed in 5.6

  • Linux Linux

    5.6

  • KernelLinux

    fixed in 5.4.291; From 5.5.0 · fixed in 5.10.235; From 5.6.0 · fixed in 5.15.179; From 5.11.0 · fixed in 6.1.129; From 5.16.0 · fixed in 6.6.76; From 6.2.0 · fixed in 6.12.13; From 6.7.0 · fixed in 6.13.2

References 8

git.kernel.org