CVE-2026-43201APEI/GHES: ARM processor Error: don't go past allocated memory
- 5.5MediumCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 98% 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: APEI/GHES: ARM processor Error: don't go past allocated memory If the BIOS generates a very small ARM Processor Error, or an incomplete one, the current logic will fail to deferrence err->section_length and ctx_info->size Add checks to avoid that. With such changes, such GHESv2 records won't cause OOPSes like this: [ 1.492129] Internal error: Oops: 0000000096000005 [#1] SMP [ 1.495449] Modules linked in: [ 1.495820] CPU: 0 UID: 0 PID: 9 Comm: kworker/0:0 Not tainted 6.18.0-rc1-00017-gabadcc3553dd-dirty #18 PREEMPT [ 1.496125] Hardware name: QEMU QEMU Virtual Machine, BIOS unknown 02/02/2022 [ 1.496433] Workqueue: kacpi_notify acpi_os_execute_deferred [ 1.496967] pstate: 814000c5 (Nzcv daIF +PAN -UAO -TCO +DIT -SSBS BTYPE=--) [ 1.497199] pc : log_arm_hw_error+0x5c/0x200 [ 1.497380] lr : ghes_handle_arm_hw_error+0x94/0x220 0xffff8000811c5324 is in log_arm_hw_error (../drivers/ras/ras.c:75). 70 err_info = (struct cper_arm_err_info *)(err + 1); 71 ctx_info = (struct cper_arm_ctx_info *)(err_info + err->err_info_num); 72 ctx_err = (u8 *)ctx_info; 73 74 for (n = 0; n < err->context_info_num; n++) { 75 sz = sizeof(struct cper_arm_ctx_info) + ctx_info->size; 76 ctx_info = (struct cper_arm_ctx_info *)((long)ctx_info + sz); 77 ctx_len += sz; 78 } 79 and similar ones while trying to access section_length on an error dump with too small size. [ rjw: Subject tweaks ]
Timeline
ID reserved
By Linux
- 5 days later
· 5 days later
Published
- 6 months later
· 6 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 · Analyzed | 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)
- 0.13% · top 98% of all CVEs (14 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 2599ad5e33b629a78a14a463a51afa134e9c5b15 – < 242c652849d979d0133c315a42d9acea0ff88390
- affected 22b5096abc9824fb84f0bfe084f5be9f7ea5f2d9 – < 136093ba4161e0080088abff48273f6830a47766
- affected 05954511b73e748d0370549ad9dd9cd95297d97a – < db103b8bd3a4aca69b1b5fe8831a6ed75ac4b3bd
- affected 05954511b73e748d0370549ad9dd9cd95297d97a – < 87880af2d24e62a84ed19943dbdd524f097172f2
- affected 0aa7b12eaa87cd6ffa25d432d3c58986516f8b1c
- affected 6.12.63 – < 6.12.75
- affected 6.18.2 – < 6.18.16
- affected 6.17.13 – < 6.18
- affected 6.19
- unaffected < 6.19
- unaffected 6.12.75 – ≤ 6.12.*
- unaffected 6.18.16 – ≤ 6.18.*
- unaffected 6.19.6 – ≤ 6.19.*
- unaffected 7.0 – ≤ *
References
References4
- https://git.kernel.org/stable/c/242c652849d979d0133c315a42d9acea0ff88390 (opens in a new tab)
- https://git.kernel.org/stable/c/136093ba4161e0080088abff48273f6830a47766 (opens in a new tab)
- https://git.kernel.org/stable/c/db103b8bd3a4aca69b1b5fe8831a6ed75ac4b3bd (opens in a new tab)
- https://git.kernel.org/stable/c/87880af2d24e62a84ed19943dbdd524f097172f2 (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-2026-27760 (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-2026-43201)Record last updated .