CVE-2023-52621

bpf: Check rcu_read_lock_trace_held() before calling bpf map helpers

HIGH

7.8

CVSS Score

Published: March 26, 2024 at 05:19 PM UTC

Updated: June 17, 2026 at 06:43 AM UTC

2 products affected across 2 vendorsLinux KernelDebian Linux

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Severity

HIGH7.8

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

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>

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux · Debiandrupal

95%

11.0

Linux Kernel · Linux

95%

5.10 ≤ v < 5.10.2375.10 ≤ v < 5.15.1815.10 ≤ v < 6.1.775.10 ≤ v < 6.6.165.10 ≤ v < 6.7.45.10 ≤ v < 6.85.11 ≤ v < 5.15.1815.16 ≤ v < 6.1.776.2 ≤ v < 6.6.166.7 ≤ v < 6.7.41e6c62a8821557720a9b2ea9617359b264f2f67c5.10

Vendor states this is fixed in 169410eba271afc9f0fb476d996795aa26770c6d (fixed)

Vendor states this is fixed in 3516f93cc63d956e1b290ae4b7bf2586074535a0 (fixed)

Vendor states this is fixed in 483cb92334cd7f1d5387dccc0ab5d595d27a669d (fixed)

Vendor states this is fixed in 82f2df94dac1aa9b879e74d1f82ba1b631bdc612 (fixed)

Vendor states this is fixed in c7f1b6146f4a46d727c0d046284c28b6882c6304 (fixed)

Vendor states this is fixed in d6d6fe4bb105595118f12abeed4a7bdd450853f3 (fixed)

Vendor states this is fixed in 5.10 (unaffected)

Vendor states this is fixed in 5.10.237 (unaffected)

Vendor states this is fixed in 5.15.181 (unaffected)

Vendor states this is fixed in 6.1.77 (unaffected)

Vendor states this is fixed in 6.6.16 (unaffected)

Vendor states this is fixed in 6.7.4 (unaffected)