CVE-2024-56694

MEDIUM EPSS 5.9%
Published Dec 28, 20241y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Dec 28, 2024 1y ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: bpf: fix recursive lock when verdict program return SK_PASS When the stream_verdict program returns SK_PASS, it places the received skb into its own receive queue, but a recursive lock eventually occurs, leading to an operating system deadlock. This issue has been present since v6.9. ''' sk_psock_strp_data_ready write_lock_bh(&sk->sk_callback_lock) strp_data_ready strp_read_sock read_sock -> tcp_read_sock strp_recv cb.rcv_msg -> sk_psock_strp_read # now stream_verdict return SK_PASS without peer sock assign __SK_PASS = sk_psock_map_verd(SK_PASS, NULL) sk_psock_verdict_apply sk_psock_skb_ingress_self sk_psock_skb_ingress_enqueue sk_psock_data_ready read_lock_bh(&sk->sk_callback_lock) <= dead lock ''' This topic has been discussed before, but it has not been fixed. Previous discussion: https://lore.kernel.org/all/6684a5864ec86_403d20898@john.notmuch

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
5.9% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-667

Affected Products 6

VendorProductVersionRange
linuxlinux_kernel*≥5.10.223  –  <5.11
linuxlinux_kernel*≥5.15.159  –  <5.15.174
linuxlinux_kernel*≥6.1.91  –  <6.1.120
linuxlinux_kernel*≥6.6.31  –  <6.6.64
linuxlinux_kernel*≥6.8.10  –  <6.11.11
linuxlinux_kernel*≥6.12  –  <6.12.2

References 9

  • git.kernel.org https://git.kernel.org/stable/c/01f1b88acfd79103da0610b45471f6c88ea98d72
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/221109ba2127eabd0aa64718543638b58b15df56
  • git.kernel.org https://git.kernel.org/stable/c/386efa339e08563dd33e83bc951aea5d407fe578
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6694f7acd625ed854bf6342926e771d65dad7f69
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8ca2a1eeadf09862190b2810697702d803ceef2d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/da2bc8a0c8f3ac66fdf980fc59936f851a083561
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f84c5ef6ca23cc2f72f3b830d74f67944684bb05
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/01f1b88acfd79103da0610b45471f6c88ea98d72
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/386efa339e08563dd33e83bc951aea5d407fe578
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6694f7acd625ed854bf6342926e771d65dad7f69
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8ca2a1eeadf09862190b2810697702d803ceef2d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/da2bc8a0c8f3ac66fdf980fc59936f851a083561
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f84c5ef6ca23cc2f72f3b830d74f67944684bb05
    Patch