tls: fix missing memory barrier in tls_init

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2024-36489
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2024-06-21 11:15:10 UTC
Updated2026-05-12 12:16:48 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem Types: CWE-476

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected d5bee7374b68de3c44586d46e9e61ffc97a1e886 d72e126e9a36d3d33889829df8fc90100bb0e071 git Not specified
CNA Linux Linux affected d5bee7374b68de3c44586d46e9e61ffc97a1e886 2c260a24cf1c4d30ea3646124f766ee46169280b git Not specified
CNA Linux Linux affected d5bee7374b68de3c44586d46e9e61ffc97a1e886 335c8f1566d8e44c384d16b450a18554896d4e8b git Not specified
CNA Linux Linux affected d5bee7374b68de3c44586d46e9e61ffc97a1e886 ab67c2fd3d070a21914d0c31319d3858ab4e199c git Not specified
CNA Linux Linux affected d5bee7374b68de3c44586d46e9e61ffc97a1e886 ef21007a7b581c7fe64d5a10c320880a033c837b git Not specified
CNA Linux Linux affected d5bee7374b68de3c44586d46e9e61ffc97a1e886 91e61dd7a0af660408e87372d8330ceb218be302 git Not specified
CNA Linux Linux affected 5.7 Not specified
CNA Linux Linux unaffected 5.7 semver Not specified
CNA Linux Linux unaffected 5.10.219 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.161 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.93 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.33 6.6.* semver Not specified
CNA Linux Linux unaffected 6.9.4 6.9.* semver Not specified
CNA Linux Linux unaffected 6.10 * original_commit_for_fix Not specified
ADP Siemens RUGGEDCOM RST2428P affected V3.1 custom Not specified
ADP Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 Family unaffected * custom Not specified
ADP Siemens SCALANCE XCM-/XRM-/XCH-/XRH-300 Family affected V3.1 custom Not specified
ADP Siemens SIMATIC S7-1500 TM MFP - GNU/Linux Subsystem affected * custom Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/ab67c2fd3d070a21914d0c31319d3858ab4e199c af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/335c8f1566d8e44c384d16b450a18554896d4e8b af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
cert-portal.siemens.com/productcert/html/ssa-265688.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/ef21007a7b581c7fe64d5a10c320880a033c837b af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
cert-portal.siemens.com/productcert/html/ssa-613116.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/d72e126e9a36d3d33889829df8fc90100bb0e071 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/2c260a24cf1c4d30ea3646124f766ee46169280b af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/91e61dd7a0af660408e87372d8330ceb218be302 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
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