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CVE-2024-58237— bpf: consider that tail calls invalidate packet pointers

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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，该漏洞源于未考虑尾调用会无效化包指针，可能导致无效的包指针。

CVSS 7.8 · High EPSS 0.18% · P8

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux 51c39bb1d5d105a02e29aa7960f0a395086e6342< f1692ee23dcaaddc24ba407b269707ee5df1301f affected
51c39bb1d5d105a02e29aa7960f0a395086e6342< 1c2244437f9ad3dd91215f920401a14f2542dbfc affected
51c39bb1d5d105a02e29aa7960f0a395086e6342< 1a4607ffba35bf2a630aab299e34dd3f6e658d70 affected
5.6 affected
< 5.6 unaffected
6.6.90≤ 6.6.* unaffected
6.12.9≤ 6.12.* unaffected
6.13≤ * unaffected
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I. Basic Information for CVE-2024-58237

Vulnerability Information
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Vulnerability Title
bpf: consider that tail calls invalidate packet pointers
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: bpf: consider that tail calls invalidate packet pointers Tail-called programs could execute any of the helpers that invalidate packet pointers. Hence, conservatively assume that each tail call invalidates packet pointers. Making the change in bpf_helper_changes_pkt_data() automatically makes use of check_cfg() logic that computes 'changes_pkt_data' effect for global sub-programs, such that the following program could be rejected: int tail_call(struct __sk_buff *sk) { bpf_tail_call_static(sk, &jmp_table, 0); return 0; } SEC("tc") int not_safe(struct __sk_buff *sk) { int *p = (void *)(long)sk->data; ... make p valid ... tail_call(sk); *p = 42; /* this is unsafe */ ... } The tc_bpf2bpf.c:subprog_tc() needs change: mark it as a function that can invalidate packet pointers. Otherwise, it can't be freplaced with tailcall_freplace.c:entry_freplace() that does a tail call.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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，该漏洞源于未考虑尾调用会无效化包指针，可能导致无效的包指针。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux 51c39bb1d5d105a02e29aa7960f0a395086e6342 ~ f1692ee23dcaaddc24ba407b269707ee5df1301f -
Linux Linux 5.6 -

II. Public POCs for CVE-2024-58237

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III. Intelligence Information for CVE-2024-58237

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Same Patch Batch · Linux · 2025-05-05 · 3 CVEs total

CVE-2024-58098 7.8 HIGH bpf: track changes_pkt_data property for global functions
CVE-2024-58100 7.8 HIGH bpf: check changes_pkt_data property for extension programs

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-58237

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