CVE-2023-52621
"Linux Kernel BPF Map Helpers Sleepable Program Denial of Service"
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>
INFO
Published Date :
March 26, 2024, 6:15 p.m.
Last Modified :
May 2, 2025, 7:15 a.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
5.9
Exploitability Score :
1.8
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2023-52621.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2023-52621 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2023-52621 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 02, 2025
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/3516f93cc63d956e1b290ae4b7bf2586074535a0 Added Reference https://git.kernel.org/stable/c/82f2df94dac1aa9b879e74d1f82ba1b631bdc612 -
Initial Analysis by [email protected]
Mar. 17, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-617 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 from (excluding) 6.7.4 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 from (excluding) 6.6.16 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (excluding) 6.1.77 Added Reference Type CVE: https://git.kernel.org/stable/c/169410eba271afc9f0fb476d996795aa26770c6d Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/169410eba271afc9f0fb476d996795aa26770c6d Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/483cb92334cd7f1d5387dccc0ab5d595d27a669d Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/483cb92334cd7f1d5387dccc0ab5d595d27a669d Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/c7f1b6146f4a46d727c0d046284c28b6882c6304 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/c7f1b6146f4a46d727c0d046284c28b6882c6304 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/d6d6fe4bb105595118f12abeed4a7bdd450853f3 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/d6d6fe4bb105595118f12abeed4a7bdd450853f3 Types: Patch -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/169410eba271afc9f0fb476d996795aa26770c6d Added Reference https://git.kernel.org/stable/c/483cb92334cd7f1d5387dccc0ab5d595d27a669d Added Reference https://git.kernel.org/stable/c/c7f1b6146f4a46d727c0d046284c28b6882c6304 Added Reference https://git.kernel.org/stable/c/d6d6fe4bb105595118f12abeed4a7bdd450853f3 -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 29, 2024
Action Type Old Value New Value -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 14, 2024
Action Type Old Value New Value -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Mar. 26, 2024
Action Type Old Value New Value Added 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> Added Reference kernel.org https://git.kernel.org/stable/c/d6d6fe4bb105595118f12abeed4a7bdd450853f3 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/483cb92334cd7f1d5387dccc0ab5d595d27a669d [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/c7f1b6146f4a46d727c0d046284c28b6882c6304 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/169410eba271afc9f0fb476d996795aa26770c6d [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2023-52621 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2023-52621
weaknesses.