CVE-2022-50266 (GCVE-0-2022-50266)
Vulnerability from cvelistv5
Published
2025-09-15 14:21
Modified
2025-09-15 14:21
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: kprobes: Fix check for probe enabled in kill_kprobe() In kill_kprobe(), the check whether disarm_kprobe_ftrace() needs to be called always fails. This is because before that we set the KPROBE_FLAG_GONE flag for kprobe so that "!kprobe_disabled(p)" is always false. The disarm_kprobe_ftrace() call introduced by commit: 0cb2f1372baa ("kprobes: Fix NULL pointer dereference at kprobe_ftrace_handler") to fix the NULL pointer reference problem. When the probe is enabled, if we do not disarm it, this problem still exists. Fix it by putting the probe enabled check before setting the KPROBE_FLAG_GONE flag.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0c76ef3f26d5ef2ac2c21b47e7620cff35809fbb
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c909985dd0c0f74b61e3f8f0e04bf8aa9c8b97c7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f20a067f13106565816b4b6a6b665b2088a63824
Impacted products
Vendor Product Version
Linux Linux Version: 3031313eb3d549b7ad6f9fbcc52ba04412e3eb9e
Version: 3031313eb3d549b7ad6f9fbcc52ba04412e3eb9e
Version: 3031313eb3d549b7ad6f9fbcc52ba04412e3eb9e
Version: 3c5f8d371b7fef3e3714c4a062c7f3b4aa41d122
Version: 9b55d84deec88c02b053a819acf08a6d471dda02
Version: 2295608b44c91df767a5c68027f9c9e52ecb28e7
Version: ce7ff920092130f249b75f9fe177edb3362fefe8
Version: 3995f7a60feceba6c8f762f4aff3184f90a1291d
Version: 247c62ebdfae450bb76dd89cd4724df6be07df75
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   Linux Linux Version: 5.9
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nkprobes: Fix check for probe enabled in kill_kprobe()\n\nIn kill_kprobe(), the check whether disarm_kprobe_ftrace() needs to be\ncalled always fails. This is because before that we set the\nKPROBE_FLAG_GONE flag for kprobe so that \"!kprobe_disabled(p)\" is always\nfalse.\n\nThe disarm_kprobe_ftrace() call introduced by commit:\n\n  0cb2f1372baa (\"kprobes: Fix NULL pointer dereference at kprobe_ftrace_handler\")\n\nto fix the NULL pointer reference problem. When the probe is enabled, if\nwe do not disarm it, this problem still exists.\n\nFix it by putting the probe enabled check before setting the\nKPROBE_FLAG_GONE flag."
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        "dateUpdated": "2025-09-15T14:21:02.529Z",
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}


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