Answer in brief
CVE-2022-50219 records a High severity (CVSS 7.8) vulnerability in bpf: Fix KASAN use-after-free Read in compute_effective_progs. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=af6eea57437a830293eab56246b6025cc7d46ee7 <3527e3cbb84d8868c4d4e91ba55915f96d39ec3d || >=af6eea57437a830293eab56246b6025cc7d46ee7 <1f8ca9c40e6222ce431e9ba5dae3cccce8ef9443 || >=af6eea57437a830293eab56246b6025cc7d46ee7 <6336388715afa419cc97d0255bda3bba1b96b7ca || >=af6eea57437a830293eab56246b6025cc7d46ee7 <be001f9da71eaa3b61e186fb88bde3279728bdca || >=af6eea57437a830293eab56246b6025cc7d46ee7 <4c46091ee985ae84c60c5e95055d779fcd291d87 | 3527e3cbb84d8868c4d4e91ba55915f96d39ec3d, 1f8ca9c40e6222ce431e9ba5dae3cccce8ef9443, 6336388715afa419cc97d0255bda3bba1b96b7ca, be001f9da71eaa3b61e186fb88bde3279728bdca, 4c46091ee985ae84c60c5e95055d779fcd291d87 |
| Linux/Linuxgeneric | 5.7 | Not reported |
Published upstream
Jun 18, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
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.
Quoted source text, attributed separately from HOL analysis.