CVE-2024-27406

lib/Kconfig.debug: TEST_IOV_ITER depends on MMU

MEDIUM
5.5
CVSS Score
Published: May 17, 2024 at 11:40 AM UTC
Updated: June 17, 2026 at 07:19 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: lib/Kconfig.debug: TEST_IOV_ITER depends on MMU Trying to run the iov_iter unit test on a nommu system such as the qemu kc705-nommu emulation results in a crash. KTAP version 1 # Subtest: iov_iter # module: kunit_iov_iter 1..9 BUG: failure at mm/nommu.c:318/vmap()! Kernel panic - not syncing: BUG! The test calls vmap() directly, but vmap() is not supported on nommu systems, causing the crash. TEST_IOV_ITER therefore needs to depend on MMU.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

6.6 ≤ v < 6.6.196.6 ≤ v < 6.7.76.6 ≤ v < 6.86.7 ≤ v < 6.7.72d71340ff1d41a5b9fc1b30ded12d638b2e2ae966.66.8 rc16.8 rc26.8 rc36.8 rc46.8 rc5
Vendor states this is fixed in 1eb1e984379e2da04361763f66eec90dd75cf63e (fixed)
Vendor states this is fixed in 9e6e541b97762d5b1143070067f7c68f39a408f8 (fixed)
Vendor states this is fixed in e6316749d603fe9c4c91f6ec3694e06e4de632a3 (fixed)
Vendor states this is fixed in 6.6 (unaffected)
Vendor states this is fixed in 6.6.19 (unaffected)
Vendor states this is fixed in 6.7.7 (unaffected)
Vendor states this is fixed in 6.8 (unaffected)

References (3)

Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/1eb1e984379e2da04361763f66eec90dd75cf63e
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/9e6e541b97762d5b1143070067f7c68f39a408f8
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/e6316749d603fe9c4c91f6ec3694e06e4de632a3

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-476

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