Bug 2536141 (CVE-2026-90340)

Summary: CVE-2026-90340 kernel: pinctrl: generic: free maps on pinctrl_generic_to_map() failure
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: akhatavk, aos-team-art-private, asdas, dpaolell, jdelft, jupierce, lgarciaa, mbiarnes, ppalepu, ppostler, prdhamdh, rhel-process-autobot, sghai, sidsharm, suppawar, vlaad, watson-tool-maintainers
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in the Linux kernel. When the `pinctrl_generic_to_map()` function encounters an error during device tree configuration parsing, it fails to properly free partially allocated memory. This oversight leads to memory leaks, which could potentially result in system instability or a denial of service (DoS) condition over time.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-09-17 16:39:47 UTC 
In the Linux kernel, the following vulnerability has been resolved:

pinctrl: generic: free maps on pinctrl_generic_to_map() failure

pinctrl_generic_to_map() parses DT configuration and allocates pinctrl
maps via pinctrl_utils_reserve_map().

If subsequent steps (such as pinctrl_utils_add_map_mux(),
pinctrl_generic_add_group(), pinconf_generic_parse_dt_config(), or
pinctrl_utils_add_map_configs()) return an error, *maps may contain
partially allocated map entries. Returning the error directly without
freeing *maps leaks the allocated mapping memory across all drivers
that rely on pinctrl_generic_to_map().

Fix this by calling pinctrl_utils_free_map() and resetting *maps,
*num_maps, and *num_reserved_maps in the error path of
pinctrl_generic_to_map().
Comment 1 gkamathe 2026-09-22 04:16:47 UTC 
Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-90340.mbox