UBUNTU-CVE-2025-38012
In the Linux kernel, the following vulnerability has been resolved: sched_ext: bpf_iter_scx_dsq_new() should always initialize iterator BPF programs may call next() and destroy() on BPF iterators even after new() returns an error value (e.g. bpf_for_each() macro ignores error returns from new()). bpf_iter_scx_dsq_new() could leave the iterator in an uninitialized state after an error return causing bpf_iter_scx_dsq_next() to dereference garbage data. Make bpf_iter_scx_dsq_new() always clear $kit->dsq so that next() and destroy() become noops.
02 / AFFECTED SOFTWARE
Affected packages
11 explicit affected versions
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3 explicit affected versions
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7 explicit affected versions
10 explicit affected versions
12 explicit affected versions
1 explicit affected versions
44 explicit affected versions
16 explicit affected versions
3 explicit affected versions
13 explicit affected versions
26 explicit affected versions
45 explicit affected versions
37 explicit affected versions
14 explicit affected versions
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11 explicit affected versions
7 explicit affected versions
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13 explicit affected versions
43 explicit affected versions
10 explicit affected versions
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14 explicit affected versions
4 explicit affected versions
78 explicit affected versions
11 explicit affected versions
1 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
In the Linux kernel, the following vulnerability has been resolved: sched_ext: bpf_iter_scx_dsq_new() should always initialize iterator BPF programs may call next() and destroy() on BPF iterators even after new() returns an error value (e.g. bpf_for_each() macro ignores error returns from new()). bpf_iter_scx_dsq_new() could leave the iterator in an uninitialized state after an error return causing bpf_iter_scx_dsq_next() to dereference garbage data. Make bpf_iter_scx_dsq_new() always clear $kit->dsq so that next() and destroy() become noops.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/428dc9fc0873989d73918d4a9cc22745b7bbc799
- https://git.kernel.org/stable/c/0102989af4c334d1d98b2a0fd4d61a5152e39b72
- https://git.kernel.org/stable/c/255dd31bfc4a67a19b1fc2cd130a50284dadfe3a
- https://git.kernel.org/stable/c/428dc9fc0873989d73918d4a9cc22745b7bbc799
- https://ubuntu.com/security/CVE-2025-38012
- https://ubuntu.com/security/notices/USN-7699-1
- https://ubuntu.com/security/notices/USN-7699-2
- https://ubuntu.com/security/notices/USN-7721-1
- https://www.cve.org/CVERecord?id=CVE-2025-38012