What’s Vulnerable › Vulnerabilities

CVE-2023-52653: SUNRPC: fix a memleak in gss_import_v2_context

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-05-01 · updated 2026-10-30
• Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: SUNRPC: fix a memleak in gss_import_v2_context The ctx->mech_used.data allocated by kmemdup is not freed in neither gss_import_v2_context nor it only caller gss_krb5_import_sec_context, which frees ctx on error. Thus, this patch reform the last call of gss_import_v2_context to the gss_krb5_import_ctx_v2, preventing the memleak while keepping the return formation.

Affected products

• Linux kernel: from 2.6.35 before 6.6.23; from 6.7 before 6.7.11; from 6.8 before 6.8.2 — fixed in 6.6.23, 6.7.11, 6.8.2
• Linux: 2.6.35 — fixed in 6.9

How to fix

Upgrade to a fixed version: Linux kernel 6.6.23, 6.7.11, 6.8.2; Linux 6.9. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/32a15b6a9a0ac326ca65ce988a1ba046517af3d5
• https://git.kernel.org/stable/c/47ac11db93e74ac49cd6c3fc69bcbc5964c4a8b4
• https://git.kernel.org/stable/c/99044c01ed5329e73651c054d8a4baacdbb1a27c
• https://git.kernel.org/stable/c/d111e30d9cd846bb368faf3637dc0f71fcbcf822
• https://git.kernel.org/stable/c/e67b652d8e8591d3b1e569dbcdfcee15993e91fa
• https://git.kernel.org/stable/c/47ac11db93e74ac49cd6c3fc69bcbc5964c4a8b4
• https://git.kernel.org/stable/c/99044c01ed5329e73651c054d8a4baacdbb1a27c
• https://git.kernel.org/stable/c/d111e30d9cd846bb368faf3637dc0f71fcbcf822
• https://git.kernel.org/stable/c/e67b652d8e8591d3b1e569dbcdfcee15993e91fa

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