powerpc/rtas_flash: allow user copy to flash block cache objects (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.17 % · percentile 6 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Analyzed
Description
In the Linux kernel, the following vulnerability has been resolved: powerpc/rtas_flash: allow user copy to flash block cache objects With hardened usercopy enabled (CONFIG_HARDENED_USERCOPY=y), using the /proc/powerpc/rtas/firmware_update interface to prepare a system firmware update yields a BUG(): kernel BUG at mm/usercopy.c:102! Oops: Exception in kernel mode, sig: 5 [#1] LE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=2048 NUMA pSeries Modules linked in: CPU: 0 PID: 2232 Comm: dd Not tainted 6.5.0-rc3+ #2 Hardware name: IBM,8408-E8E POWER8E (raw) 0x4b0201 0xf000004 of:IBM,FW860.50 (SV860_146) hv:phyp pSeries NIP: c0000000005991d0 LR: c0000000005991cc CTR: 0000000000000000 REGS: c0000000148c76a0 TRAP: 0700 Not tainted (6.5.0-rc3+) MSR: 8000000000029033 <SF,EE,ME,IR,DR,RI,LE> CR: 24002242 XER: 0000000c CFAR: c0000000001fbd34 IRQMASK: 0 [ ... GPRs omitted ... ] NIP usercopy_abort+0xa0/0xb0 LR usercopy_abort+0x9c/0xb0 Call Trace: usercopy_abort+0x9c/0xb0 (unreliable) __check_heap_object+0x1b4/0x1d0 __check_object_size+0x2d0/0x380 rtas_flash_write+0xe4/0x250 proc_reg_write+0xfc/0x160 vfs_write+0xfc/0x4e0 ksys_write+0x90/0x160 system_call_exception+0x178/0x320 system_call_common+0x160/0x2c4 The blocks of the firmware image are copied directly from user memory to objects allocated from flash_block_cache, so flash_block_cache must be created using kmem_cache_create_usercopy() to mark it safe for user access. [mpe: Trim and indent oops]
References
- https://git.kernel.org/stable/c/8f09cc15dcd91d16562400c51d24c7be0d5796fa
- https://git.kernel.org/stable/c/1d29e21ed09fa668416fa7721e08d451b9903485
- https://git.kernel.org/stable/c/0ba7f969be599e21d4b1f1e947593de6515f4996
- https://git.kernel.org/stable/c/8ef25fb13494e35c6dbe15445c7875fa92bc3e8b
- https://git.kernel.org/stable/c/b8fee83aa4ed3846c7f50a0b364bc699f48d96e5
- https://git.kernel.org/stable/c/6acb8a453388374fafb3c3b37534b675b2aa0ae1
- https://git.kernel.org/stable/c/4f3175979e62de3b929bfa54a0db4b87d36257a7
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2025-32767
- GCVE · GCVE-0-2023-53487
CERT-FR advisories
- CERTFR-2025-AVI-1032 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-1009 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0921 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0895 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.16 < 4.19.293cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.20 < 5.4.255cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.5 < 5.10.192cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.11 < 5.15.128cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.16 < 6.1.47cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.2 < 6.4.12cpe:2.3:o:linux:linux_kernel:6.5:rc1:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.5:rc2:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.5:rc3:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.5:rc4:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.5:rc5:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.5:rc6:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 6d07d1cd300f4c7e16005f881fea388164999cc8 < 8f09cc15dcd91d16562400c51d24c7be0d5796fa ; affected 6d07d1cd300f4c7e16005f881fea388164999cc8 < 1d29e21ed09fa668416fa7721e08d451b9903485 ; affected 6d07d1cd300f4c7e16005f881fea388164999cc8 < 0ba7f969be599e21d4b1f1e947593de6515f4996 ; affected 6d07d1cd300f4c7e16005f881fea388164999cc8 < 8ef25fb13494e35c6dbe15445c7875fa92bc3e8b ; affected 6d07d1cd300f4c7e16005f881fea388164999cc8 < b8fee83aa4ed3846c7f50a0b364bc699f48d96e5 ; affected 6d07d1cd300f4c7e16005f881fea388164999cc8 < 6acb8a453388374fafb3c3b37534b675b2aa0ae1 |
| Linux · Linux | affected 4.16 ; unaffected 0 < 4.16 ; unaffected 4.19.293 ≤ 4.19.* ; unaffected 5.4.255 ≤ 5.4.* ; unaffected 5.10.192 ≤ 5.10.* ; unaffected 5.15.128 ≤ 5.15.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |