UnratedFix available
bpf: Clear buf on error in __bpf_get_task_stack
Type: advisorySources: OSV
In the Linux kernel, the following vulnerability has been resolved: bpf: Clear buf on error in __bpf_get_task_stack Both bpf_get_task_stack and bpf_get_task_stack_sleepable helpers that use __bpf_get_task_stack have buf defined as ARG_PTR_TO_UNINIT_MEM argument and we should initialize the buf on every return path. Adding missing buf memset for __bpf_get_task_stack fail paths. This provides deterministic buffer contents, which is useful when the buffer is used directly as a map key.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 6.1.191, 6.12.114, 6.18.57, 6.6.160, 7.2.6
- CVEs
- CVE-2026-90300
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 7 Nov 2026, 04:27 UTC · Revision 1
Source evidence
bpf: Clear buf on error in __bpf_get_task_stack
core-osv · Original sourcePublished 17 Sept 2026, 16:08 UTC
In the Linux kernel, the following vulnerability has been resolved: bpf: Clear buf on error in __bpf_get_task_stack Both bpf_get_task_stack and bpf_get_task_stack_sleepable helpers that use __bpf_get_task_stack have buf defined as ARG_PTR_TO_UNINIT_MEM argument and we should initialize the buf on every return path. Adding missing buf memset for __bpf_get_task_stack fail paths. This provides deterministic buffer contents, which is useful when the buffer is used directly as a map key.
osv:CVE-2026-90300
Kernel
Fixed versions: 6.1.191, 6.6.160, 6.12.114, 6.18.57, 7.2.6
Complete source record
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"title": "bpf: Clear buf on error in __bpf_get_task_stack",
"summary": "In the Linux kernel, the following vulnerability has been resolved: bpf: Clear buf on error in __bpf_get_task_stack Both bpf_get_task_stack and bpf_get_task_stack_sleepable helpers that use __bpf_get_task_stack have buf defined as ARG_PTR_TO_UNINIT_MEM argument and we should initialize the buf on every return path. Adding missing buf memset for __bpf_get_task_stack fail paths. This provides deterministic buffer contents, which is useful when the buffer is used directly as a map key.",
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