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CVE-2022-50855

bpf: prevent leak of lsm program after failed attach

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

bpf: prevent leak of lsm program after failed attach

In [0], we added the ability to bpf_prog_attach LSM programs to cgroups,
but in our validation to make sure the prog is meant to be attached to
BPF_LSM_CGROUP, we return too early if the check fails. This results in
lack of decrementing prog's refcnt (through bpf_prog_put)
leaving the LSM program alive past the point of the expected lifecycle.
This fix allows for the decrement to take place.

[0] https://lore.kernel.org/all/20220628174314.1216643-4-sdf@google.com/
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version 69fd337a975c7e690dfe49d9cb4fe5ba1e6db44e
Version < 82b39df5ddb298daaf6dc504032ff7eb027fa106
Status affected
Version 69fd337a975c7e690dfe49d9cb4fe5ba1e6db44e
Version < 6a1504dd36cd9a0a69250d61da8bdb17b29f1fe8
Status affected
Version 69fd337a975c7e690dfe49d9cb4fe5ba1e6db44e
Version < e89f3edffb860a0f54a9ed16deadb7a4a1fa3862
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 6.0
Status affected
Version 0
Version < 6.0
Status unaffected
Version <= 6.0.*
Version 6.0.16
Status unaffected
Version <= 6.1.*
Version 6.1.2
Status unaffected
Version <= *
Version 6.2
Status unaffected
VulnDex Vulnerability Enrichment
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EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.03% 0.092
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
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