CVE-2022-50219
published 2025-06-18CVE-2022-50219: In the Linux kernel, the following vulnerability has been resolved: bpf: Fix KASAN use-after-free Read in compute_effective_progs Syzbot found a Use After Free…
PriorityP338high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.19%
9.2th percentile
In the Linux kernel, the following vulnerability has been resolved:
bpf: Fix KASAN use-after-free Read in compute_effective_progs
Syzbot found a Use After Free bug in compute_effective_progs().
The reproducer creates a number of BPF links, and causes a fault
injected alloc to fail, while calling bpf_link_detach on them.
Link detach triggers the link to be freed by bpf_link_free(),
which calls __cgroup_bpf_detach() and update_effective_progs().
If the memory allocation in this function fails, the function restores
the pointer to the bpf_cgroup_link on the cgroup list, but the memory
gets freed just after it returns. After this, every subsequent call to
update_effective_progs() causes this already deallocated pointer to be
dereferenced in prog_list_length(), and triggers KASAN UAF error.
To fix this issue don't preserve the pointer to the prog or link in the
list, but remove it and replace it with a dummy prog without shrinking
the table. The subsequent call to __cgroup_bpf_detach() or
__cgroup_bpf_detach() will correct it.
Affected
15 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.0.2-1 (bookworm) | linux 6.0.2-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= af6eea57437a830293eab56246b6025cc7d46ee7 < 3527e3cbb84d8868c4d4e91ba55915f96d39ec3d | 3527e3cbb84d8868c4d4e91ba55915f96d39ec3d |
| linux | linux | >= af6eea57437a830293eab56246b6025cc7d46ee7 < 1f8ca9c40e6222ce431e9ba5dae3cccce8ef9443 | 1f8ca9c40e6222ce431e9ba5dae3cccce8ef9443 |
| linux | linux | >= af6eea57437a830293eab56246b6025cc7d46ee7 < 6336388715afa419cc97d0255bda3bba1b96b7ca | 6336388715afa419cc97d0255bda3bba1b96b7ca |
| linux | linux | >= af6eea57437a830293eab56246b6025cc7d46ee7 < be001f9da71eaa3b61e186fb88bde3279728bdca | be001f9da71eaa3b61e186fb88bde3279728bdca |
| linux | linux | >= af6eea57437a830293eab56246b6025cc7d46ee7 < 4c46091ee985ae84c60c5e95055d779fcd291d87 | 4c46091ee985ae84c60c5e95055d779fcd291d87 |
| linux | linux_kernel | >= 0 < 5.10.140-1 | 5.10.140-1 |
| linux | linux_kernel | >= 0 < 6.0.2-1 | 6.0.2-1 |
| linux | linux_kernel | >= 0 < 6.0.2-1 | 6.0.2-1 |
| linux | linux_kernel | >= 0 < 6.0.2-1 | 6.0.2-1 |
| linux | linux_kernel | >= 5.11 < 5.15.61 | 5.15.61 |
| linux | linux_kernel | >= 5.16 < 5.18.18 | 5.18.18 |
| linux | linux_kernel | >= 5.19 < 5.19.2 | 5.19.2 |
| linux | linux_kernel | >= 5.7 < 5.10.138 | 5.10.138 |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv7.8HIGH
vendor_debian7.8HIGH
vendor_redhat7.8HIGH
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Red Hat
kernel: bpf: Fix KASAN use-after-free Read in compute_effective_progs
vendor_redhat·2025-06-18·CVSS 7.8
CVE-2022-50219 [HIGH] kernel: bpf: Fix KASAN use-after-free Read in compute_effective_progs
kernel: bpf: Fix KASAN use-after-free Read in compute_effective_progs
In the Linux kernel, the following vulnerability has been resolved:
bpf: Fix KASAN use-after-free Read in compute_effective_progs
Syzbot found a Use After Free bug in compute_effective_progs().
The reproducer creates a number of BPF links, and causes a fault
injected alloc to fail, while calling bpf_link_detach on them.
Link detach triggers the link to be freed by bpf_link_free(),
which calls __cgroup_bpf_detach() and update_effective_progs().
If the memory allocation in this function fails, the function restores
the pointer to the bpf_cgroup_link on the cgroup list, but the memory
gets freed just after it returns. After this, every subsequent call to
update_effective_progs() causes this already deallocated pointer to b
Debian
CVE-2022-50219: linux - In the Linux kernel, the following vulnerability has been resolved: bpf: Fix KA...
vendor_debian·2022·CVSS 7.8
CVE-2022-50219 [HIGH] CVE-2022-50219: linux - In the Linux kernel, the following vulnerability has been resolved: bpf: Fix KA...
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix KASAN use-after-free Read in compute_effective_progs Syzbot found a Use After Free bug in compute_effective_progs(). The reproducer creates a number of BPF links, and causes a fault injected alloc to fail, while calling bpf_link_detach on them. Link detach triggers the link to be freed by bpf_link_free(), which calls __cgroup_bpf_detach() and update_effective_progs(). If the memory allocation in this function fails, the function restores the pointer to the bpf_cgroup_link on the cgroup list, but the memory gets freed just after it returns. After this, every subsequent call to update_effective_progs() causes this already deallocated pointer to be dereferenced in prog_list_length(), and triggers KASAN UAF error. To
OSV
CVE-2022-50219: In the Linux kernel, the following vulnerability has been resolved: bpf: Fix KASAN use-after-free Read in compute_effective_progs Syzbot found a Use A
osv·2025-06-18·CVSS 7.8
CVE-2022-50219 [HIGH] CVE-2022-50219: In the Linux kernel, the following vulnerability has been resolved: bpf: Fix KASAN use-after-free Read in compute_effective_progs Syzbot found a Use A
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix KASAN use-after-free Read in compute_effective_progs Syzbot found a Use After Free bug in compute_effective_progs(). The reproducer creates a number of BPF links, and causes a fault injected alloc to fail, while calling bpf_link_detach on them. Link detach triggers the link to be freed by bpf_link_free(), which calls __cgroup_bpf_detach() and update_effective_progs(). If the memory allocation in this function fails, the function restores the pointer to the bpf_cgroup_link on the cgroup list, but the memory gets freed just after it returns. After this, every subsequent call to update_effective_progs() causes this already deallocated pointer to be dereferenced in prog_list_length(), and triggers KASAN UAF error. To
GHSA
GHSA-f8rq-3pf9-vf74: In the Linux kernel, the following vulnerability has been resolved:
bpf: Fix KASAN use-after-free Read in compute_effective_progs
Syzbot found a Use
ghsa_unreviewed·2025-06-18
CVE-2022-50219 [HIGH] CWE-416 GHSA-f8rq-3pf9-vf74: In the Linux kernel, the following vulnerability has been resolved:
bpf: Fix KASAN use-after-free Read in compute_effective_progs
Syzbot found a Use
In the Linux kernel, the following vulnerability has been resolved:
bpf: Fix KASAN use-after-free Read in compute_effective_progs
Syzbot found a Use After Free bug in compute_effective_progs().
The reproducer creates a number of BPF links, and causes a fault
injected alloc to fail, while calling bpf_link_detach on them.
Link detach triggers the link to be freed by bpf_link_free(),
which calls __cgroup_bpf_detach() and update_effective_progs().
If the memory allocation in this function fails, the function restores
the pointer to the bpf_cgroup_link on the cgroup list, but the memory
gets freed just after it returns. After this, every subsequent call to
update_effective_progs() causes this already deallocated pointer to be
dereferenced in prog_list_length(), and triggers KASAN UAF error.
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/1f8ca9c40e6222ce431e9ba5dae3cccce8ef9443https://git.kernel.org/stable/c/3527e3cbb84d8868c4d4e91ba55915f96d39ec3dhttps://git.kernel.org/stable/c/4c46091ee985ae84c60c5e95055d779fcd291d87https://git.kernel.org/stable/c/6336388715afa419cc97d0255bda3bba1b96b7cahttps://git.kernel.org/stable/c/be001f9da71eaa3b61e186fb88bde3279728bdca
2025-06-18
Published