Bug 2536640 (CVE-2026-90314)

Summary: CVE-2026-90314 kernel: remoteproc: fix OOB read via signed offset in rsc_table_for_each_entry()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
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's `remoteproc` component. This vulnerability allows a local attacker to trigger an out-of-bounds read by providing a specially crafted offset from firmware. The issue arises because a 32-bit unsigned integer offset is incorrectly handled as a signed integer, leading to a negative value that bypasses a crucial size check. This can result in information disclosure, potentially allowing an attacker to gain access to sensitive data.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description OSIDB Bzimport 2026-09-17 19:00:40 UTC 
In the Linux kernel, the following vulnerability has been resolved:

remoteproc: fix OOB read via signed offset in rsc_table_for_each_entry()

table->offset[i] is a u32 from firmware, but was stored into a signed
int.  A crafted offset like 0xFFFFFFF0 becomes -16, placing hdr 16 bytes
before the table buffer.  The subsequent avail check was bypassed
because the negative int was promoted to a large size_t in the
expression "table_sz - offset - sizeof(*hdr)", yielding a large positive
avail and letting the out-of-bounds hdr->type read proceed undetected.

Store the offset as u32 and validate it with unsigned comparisons before
any pointer arithmetic.
Comment 1 gkamathe 2026-09-23 06:16:18 UTC 
Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-90314.mbox