CVE-2022-50870 | THREATINT

Description

In the Linux kernel, the following vulnerability has been resolved: powerpc/rtas: avoid device tree lookups in rtas_os_term() rtas_os_term() is called during panic. Its behavior depends on a couple of conditions in the /rtas node of the device tree, the traversal of which entails locking and local IRQ state changes. If the kernel panics while devtree_lock is held, rtas_os_term() as currently written could hang. Instead of discovering the relevant characteristics at panic time, cache them in file-static variables at boot. Note the lookup for "ibm,extended-os-term" is converted to of_property_read_bool() since it is a boolean property, not an RTAS function token. [mpe: Incorporate suggested change from Nick]

PUBLISHED Reserved 2025-12-30 | Published 2025-12-30 | Updated 2025-12-30 | Assigner Linux

Product status

Default status

unaffected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before e23822c7381c59d9e42e65771b6e17c71ed30ea7

affected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 06a07fbb32b3a23eec20a42b1e64474da0a3b33e

affected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before c2fa91abf22a705cf02f886cd99cff41f4ceda60

affected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before f2167f10fcca68ab9ae3f8d94d2c704c5541ac69

affected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before d8939315b7342860df143afe0adda6212cdd3193

affected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 698e682c849e356fb47a8be47ca8baa817cf31e0

affected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 464d10e8d797454e16a173ef1292a446b2adf21c

affected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before ed2213bfb192ab51f09f12e9b49b5d482c6493f3

affected

Default status

affected

4.14.303 (semver)

unaffected

4.19.270 (semver)

unaffected

5.4.229 (semver)

unaffected

5.10.163 (semver)

unaffected

5.15.87 (semver)

unaffected

6.0.17 (semver)

unaffected

6.1.3 (semver)

unaffected

6.2 (original_commit_for_fix)

unaffected

References

git.kernel.org/...c/e23822c7381c59d9e42e65771b6e17c71ed30ea7

git.kernel.org/...c/06a07fbb32b3a23eec20a42b1e64474da0a3b33e

git.kernel.org/...c/c2fa91abf22a705cf02f886cd99cff41f4ceda60

git.kernel.org/...c/f2167f10fcca68ab9ae3f8d94d2c704c5541ac69

git.kernel.org/...c/d8939315b7342860df143afe0adda6212cdd3193

git.kernel.org/...c/698e682c849e356fb47a8be47ca8baa817cf31e0

git.kernel.org/...c/464d10e8d797454e16a173ef1292a446b2adf21c

git.kernel.org/...c/ed2213bfb192ab51f09f12e9b49b5d482c6493f3

cve.org (CVE-2022-50870)

nvd.nist.gov (CVE-2022-50870)

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