CVE-2024-26739

Summary

In the Linux kernel, the following vulnerability has been resolved:

net/sched: act_mirred: don't override retval if we already lost the skb

If we're redirecting the skb, and haven't called tcf_mirred_forward(), yet, we need to tell the core to drop the skb by setting the retcode to SHOT. If we have called tcf_mirred_forward(), however, the skb is out of our hands and returning SHOT will lead to UaF.

Move the retval override to the error path which actually need it.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxe5cf1baf92cb785b90390db1c624948e70c8b8bd < 0117fe0a4615a7c8d30d6ebcbf87332fbe63e6fdaffected
LinuxLinuxe5cf1baf92cb785b90390db1c624948e70c8b8bd < 9d3ef89b6a5e9f2e940de2cef3d543be0be8dec5affected
LinuxLinuxe5cf1baf92cb785b90390db1c624948e70c8b8bd < e873e8f7d03a2ee5b77fb1a305c782fed98e2754affected
LinuxLinuxe5cf1baf92cb785b90390db1c624948e70c8b8bd < 28cdbbd38a4413b8eff53399b3f872fd4e80db9daffected
LinuxLinuxe5cf1baf92cb785b90390db1c624948e70c8b8bd < f4e294bbdca8ac8757db436fc82214f3882fc7e7affected
LinuxLinuxe5cf1baf92cb785b90390db1c624948e70c8b8bd < 166c2c8a6a4dc2e4ceba9e10cfe81c3e469e3210affected
LinuxLinux4.19affected
LinuxLinux0 < 4.19unaffected
LinuxLinux5.10.238 <= 5.10.*unaffected
LinuxLinux5.15.182 <= 5.15.*unaffected
LinuxLinux6.1.136 <= 6.1.*unaffected
LinuxLinux6.6.19 <= 6.6.*unaffected
LinuxLinux6.7.7 <= 6.7.*unaffected
LinuxLinux6.8 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References