Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: x86/kexec: add a sanity check on previous kernel's ima kexec buffer When the second-stage kernel is booted via kexec with a limiting command line such as "mem=<size>", the physical range that contains the carried over IMA measurement list may fall outside the truncated RAM leading to a kernel panic. BUG: unable to handle page fault for address: ffff97793ff47000 RIP: ima_restore_measurement_list+0xdc/0x45a #PF: error_code(0x0000) – not-present page Other architectures already validate the range with page_is_ram(), as done in commit cbf9c4b9617b ("of: check previous kernel's ima-kexec-buffer against memory bounds") do a similar check on x86. Without carrying the measurement list across kexec, the attestation would fail.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected b69a2afd5afce9bf6d56e349d6ab592c916e20f2 before 37f18915a261afe84dab462624ed829cddb77a9b; affected b69a2afd5afce9bf6d56e349d6ab592c916e20f2 before 22e460b6333a5f818b042ac89201f8e735556f4a; affected b69a2afd5afce9bf6d56e349d6ab592c916e20f2 before 7e2476057950c174c7b2c2802246707bbfb497e4; affected b69a2afd5afce9bf6d56e349d6ab592c916e20f2 before f8f73bf0f8a57ee9b86792456bd42079bc98c6b7; affected b69a2afd5afce9bf6d56e349d6ab592c916e20f2 before d4a132f121c591b60dbaf57ea91f1faf11631fbc; affected b69a2afd5afce9bf6d56e349d6ab592c916e20f2 before 4d7a8f5f28187e3d2958b2a134473da2665207e7; affected b69a2afd5afce9bf6d56e349d6ab592c916e20f2 before c5489d04337b47e93c0623e8145fcba3f5739efd |
| Linux / Linux | affected 6.0; unaffected 0 before 6.0; unaffected 6.1.165 through 6.1.*; unaffected 6.6.128 through 6.6.*; unaffected 6.6.143 through 6.6.*; unaffected 6.12.75 through 6.12.*; unaffected 6.18.16 through 6.18.*; unaffected 6.19.6 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/37f18915a261afe84dab462624ed829cddb77a9b
- https://git.kernel.org/stable/c/22e460b6333a5f818b042ac89201f8e735556f4a
- https://git.kernel.org/stable/c/7e2476057950c174c7b2c2802246707bbfb497e4
- https://git.kernel.org/stable/c/f8f73bf0f8a57ee9b86792456bd42079bc98c6b7
- https://git.kernel.org/stable/c/d4a132f121c591b60dbaf57ea91f1faf11631fbc
- https://git.kernel.org/stable/c/4d7a8f5f28187e3d2958b2a134473da2665207e7
- https://git.kernel.org/stable/c/c5489d04337b47e93c0623e8145fcba3f5739efd