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CVE-2024-36489— tls: fix missing memory barrier in tls_init

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tls模块tls_init中存在潜在的溢出问题。

AI Predicted 7.8 Difficulty: Moderate EPSS 0.26% · P16

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux d5bee7374b68de3c44586d46e9e61ffc97a1e886< d72e126e9a36d3d33889829df8fc90100bb0e071 affected
d5bee7374b68de3c44586d46e9e61ffc97a1e886< 2c260a24cf1c4d30ea3646124f766ee46169280b affected
d5bee7374b68de3c44586d46e9e61ffc97a1e886< 335c8f1566d8e44c384d16b450a18554896d4e8b affected
d5bee7374b68de3c44586d46e9e61ffc97a1e886< ab67c2fd3d070a21914d0c31319d3858ab4e199c affected
d5bee7374b68de3c44586d46e9e61ffc97a1e886< ef21007a7b581c7fe64d5a10c320880a033c837b affected
d5bee7374b68de3c44586d46e9e61ffc97a1e886< 91e61dd7a0af660408e87372d8330ceb218be302 affected
5.7 affected
< 5.7 unaffected
… +6 more rows
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I. Basic Information for CVE-2024-36489

Vulnerability Information
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Vulnerability Title
tls: fix missing memory barrier in tls_init
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: tls: fix missing memory barrier in tls_init In tls_init(), a write memory barrier is missing, and store-store reordering may cause NULL dereference in tls_{setsockopt,getsockopt}. CPU0 CPU1 ----- ----- // In tls_init() // In tls_ctx_create() ctx = kzalloc() ctx->sk_proto = READ_ONCE(sk->sk_prot) -(1) // In update_sk_prot() WRITE_ONCE(sk->sk_prot, tls_prots) -(2) // In sock_common_setsockopt() READ_ONCE(sk->sk_prot)->setsockopt() // In tls_{setsockopt,getsockopt}() ctx->sk_proto->setsockopt() -(3) In the above scenario, when (1) and (2) are reordered, (3) can observe the NULL value of ctx->sk_proto, causing NULL dereference. To fix it, we rely on rcu_assign_pointer() which implies the release barrier semantic. By moving rcu_assign_pointer() after ctx->sk_proto is initialized, we can ensure that ctx->sk_proto are visible when changing sk->sk_prot.
Source: CVE Program / CVE List V5
CVSS Information
N/A
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tls模块tls_init中存在潜在的溢出问题。
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 d5bee7374b68de3c44586d46e9e61ffc97a1e886 ~ d72e126e9a36d3d33889829df8fc90100bb0e071 -
Linux Linux 5.7 -

II. Public POCs for CVE-2024-36489

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III. Intelligence Information for CVE-2024-36489

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Other References for CVE-2024-36489 (6)

Same Patch Batch · Linux · 2024-06-21 · 40 CVEs total

CVE-2024-36288 9.8 CRITICAL SUNRPC: Fix loop termination condition in gss_free_in_token_pages()
CVE-2024-38381 8.8 HIGH nfc: nci: Fix uninit-value in nci_rx_work
CVE-2024-33619 7.8 HIGH efi: libstub: only free priv.runtime_map when allocated
CVE-2024-36477 7.8 HIGH tpm_tis_spi: Account for SPI header when allocating TPM SPI xfer buffer
CVE-2024-38628 7.8 HIGH usb: gadget: u_audio: Fix race condition use of controls after free during gadget unbind.
CVE-2024-36286 7.8 HIGH netfilter: nfnetlink_queue: acquire rcu_read_lock() in instance_destroy_rcu()
CVE-2024-38626 7.8 HIGH fuse: clear FR_SENT when re-adding requests into pending list
CVE-2024-38388 7.8 HIGH ALSA: hda/cs_dsp_ctl: Use private_free for control cleanup
CVE-2024-38623 7.8 HIGH fs/ntfs3: Use variable length array instead of fixed size
CVE-2024-38635 7.8 HIGH soundwire: cadence: fix invalid PDI offset
CVE-2024-38659 7.3 HIGH enic: Validate length of nl attributes in enic_set_vf_port
CVE-2024-38631 iio: adc: PAC1934: fix accessing out of bounds array index
CVE-2024-38625 fs/ntfs3: Check 'folio' pointer for NULL
CVE-2024-38632 vfio/pci: fix potential memory leak in vfio_intx_enable()
CVE-2024-38633 serial: max3100: Update uart_driver_registered on driver removal
CVE-2024-38634 serial: max3100: Lock port->lock when calling uart_handle_cts_change()
CVE-2024-38636 f2fs: multidev: fix to recognize valid zero block address
CVE-2024-38637 greybus: lights: check return of get_channel_from_mode
CVE-2024-38662 bpf: Allow delete from sockmap/sockhash only if update is allowed
CVE-2024-38780 dma-buf/sw-sync: don't enable IRQ from sync_print_obj()

Showing top 20 of 40 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-36489

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