CVE-2024-49858efistub/tpm: Use ACPI reclaim memory for event log to avoid corruption
- 5.5MediumCVSS base score
- 0.21%Exploitation in 30 daysEPSS · top 88% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: efistub/tpm: Use ACPI reclaim memory for event log to avoid corruption The TPM event log table is a Linux specific construct, where the data produced by the GetEventLog() boot service is cached in memory, and passed on to the OS using an EFI configuration table. The use of EFI_LOADER_DATA here results in the region being left unreserved in the E820 memory map constructed by the EFI stub, and this is the memory description that is passed on to the incoming kernel by kexec, which is therefore unaware that the region should be reserved. Even though the utility of the TPM2 event log after a kexec is questionable, any corruption might send the parsing code off into the weeds and crash the kernel. So let's use EFI_ACPI_RECLAIM_MEMORY instead, which is always treated as reserved by the E820 conversion logic.
Timeline
ID reserved
By Linux
Published
- 19 months later
· 19 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.21% · top 88% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 33b6d03469b2206fb51ecc37f40411a857ad8fff – < f76b69ab9cf04358266e3cea5748c0c2791fbb08
- affected 33b6d03469b2206fb51ecc37f40411a857ad8fff – < 11690d7e76842f29b60fbb5b35bc97d206ea0e83
- affected 33b6d03469b2206fb51ecc37f40411a857ad8fff – < 5b22c038fb2757c652642933de5664da471f8cb7
- affected 33b6d03469b2206fb51ecc37f40411a857ad8fff – < 19fd2f2c5fb36b61506d3208474bfd8fdf1cada3
- affected 33b6d03469b2206fb51ecc37f40411a857ad8fff – < 38d9b07d99b789efb6d8dda21f1aaad636c38993
- affected 33b6d03469b2206fb51ecc37f40411a857ad8fff – < 2e6871a632a99d9b9e2ce3a7847acabe99e5a26e
- affected 33b6d03469b2206fb51ecc37f40411a857ad8fff – < 77d48d39e99170b528e4f2e9fc5d1d64cdedd386
- affected 4.16
- unaffected < 4.16
- unaffected 5.10.227 – ≤ 5.10.*
- unaffected 5.15.168 – ≤ 5.15.*
- unaffected 6.1.113 – ≤ 6.1.*
- unaffected 6.6.54 – ≤ 6.6.*
- unaffected 6.10.13 – ≤ 6.10.*
- unaffected 6.11.2 – ≤ 6.11.*
- unaffected 6.12 – ≤ *
References
References9
- https://git.kernel.org/stable/c/f76b69ab9cf04358266e3cea5748c0c2791fbb08 (opens in a new tab)
- https://git.kernel.org/stable/c/11690d7e76842f29b60fbb5b35bc97d206ea0e83 (opens in a new tab)
- https://git.kernel.org/stable/c/5b22c038fb2757c652642933de5664da471f8cb7 (opens in a new tab)
- https://git.kernel.org/stable/c/19fd2f2c5fb36b61506d3208474bfd8fdf1cada3 (opens in a new tab)
- https://git.kernel.org/stable/c/38d9b07d99b789efb6d8dda21f1aaad636c38993 (opens in a new tab)
- https://git.kernel.org/stable/c/2e6871a632a99d9b9e2ce3a7847acabe99e5a26e (opens in a new tab)
- https://git.kernel.org/stable/c/77d48d39e99170b528e4f2e9fc5d1d64cdedd386 (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2024-43778 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2024-49858)Record last updated .