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CVE-2023-52621— bpf: Check rcu_read_lock_trace_held() before calling bpf map helpers

EPSS 0.01% · P0
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I. Basic Information for CVE-2023-52621

Vulnerability Information
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Vulnerability Title
bpf: Check rcu_read_lock_trace_held() before calling bpf map helpers
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Check rcu_read_lock_trace_held() before calling bpf map helpers These three bpf_map_{lookup,update,delete}_elem() helpers are also available for sleepable bpf program, so add the corresponding lock assertion for sleepable bpf program, otherwise the following warning will be reported when a sleepable bpf program manipulates bpf map under interpreter mode (aka bpf_jit_enable=0): WARNING: CPU: 3 PID: 4985 at kernel/bpf/helpers.c:40 ...... CPU: 3 PID: 4985 Comm: test_progs Not tainted 6.6.0+ #2 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996) ...... RIP: 0010:bpf_map_lookup_elem+0x54/0x60 ...... Call Trace: <TASK> ? __warn+0xa5/0x240 ? bpf_map_lookup_elem+0x54/0x60 ? report_bug+0x1ba/0x1f0 ? handle_bug+0x40/0x80 ? exc_invalid_op+0x18/0x50 ? asm_exc_invalid_op+0x1b/0x20 ? __pfx_bpf_map_lookup_elem+0x10/0x10 ? rcu_lockdep_current_cpu_online+0x65/0xb0 ? rcu_is_watching+0x23/0x50 ? bpf_map_lookup_elem+0x54/0x60 ? __pfx_bpf_map_lookup_elem+0x10/0x10 ___bpf_prog_run+0x513/0x3b70 __bpf_prog_run32+0x9d/0xd0 ? __bpf_prog_enter_sleepable_recur+0xad/0x120 ? __bpf_prog_enter_sleepable_recur+0x3e/0x120 bpf_trampoline_6442580665+0x4d/0x1000 __x64_sys_getpgid+0x5/0x30 ? do_syscall_64+0x36/0xb0 entry_SYSCALL_64_after_hwframe+0x6e/0x76 </TASK>
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在安全漏洞，该漏洞源于在调用 bpf 映射助手之前没有检查 rcu_read_lock_trace_held()。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux 1e6c62a8821557720a9b2ea9617359b264f2f67c ~ 82f2df94dac1aa9b879e74d1f82ba1b631bdc612 -
LinuxLinux 5.10 -

II. Public POCs for CVE-2023-52621

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III. Intelligence Information for CVE-2023-52621

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Same Patch Batch · Linux · 2024-03-26 · 13 CVEs total

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CVE-2023-52623SUNRPC: Fix a suspicious RCU usage warning
CVE-2023-52624drm/amd/display: Wake DMCUB before executing GPINT commands
CVE-2023-52625drm/amd/display: Refactor DMCUB enter/exit idle interface
CVE-2023-52626net/mlx5e: Fix operation precedence bug in port timestamping napi_poll context
CVE-2023-52627iio: adc: ad7091r: Allow users to configure device events
CVE-2024-26646thermal: intel: hfi: Add syscore callbacks for system-wide PM
CVE-2024-26647drm/amd/display: Fix late derefrence 'dsc' check in 'link_set_dsc_pps_packet()'
CVE-2024-26648drm/amd/display: Fix variable deferencing before NULL check in edp_setup_replay()
CVE-2024-26649drm/amdgpu: Fix the null pointer when load rlc firmware

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2023-52621

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