CVE-2025-71139 (GCVE-0-2025-71139)

Vulnerability from cvelistv5 – Published: 2026-01-14 15:07 – Updated: 2026-02-09 08:35
VLAI?
Title
kernel/kexec: fix IMA when allocation happens in CMA area
Summary
In the Linux kernel, the following vulnerability has been resolved: kernel/kexec: fix IMA when allocation happens in CMA area *** Bug description *** When I tested kexec with the latest kernel, I ran into the following warning: [ 40.712410] ------------[ cut here ]------------ [ 40.712576] WARNING: CPU: 2 PID: 1562 at kernel/kexec_core.c:1001 kimage_map_segment+0x144/0x198 [...] [ 40.816047] Call trace: [ 40.818498] kimage_map_segment+0x144/0x198 (P) [ 40.823221] ima_kexec_post_load+0x58/0xc0 [ 40.827246] __do_sys_kexec_file_load+0x29c/0x368 [...] [ 40.855423] ---[ end trace 0000000000000000 ]--- *** How to reproduce *** This bug is only triggered when the kexec target address is allocated in the CMA area. If no CMA area is reserved in the kernel, use the "cma=" option in the kernel command line to reserve one. *** Root cause *** The commit 07d24902977e ("kexec: enable CMA based contiguous allocation") allocates the kexec target address directly on the CMA area to avoid copying during the jump. In this case, there is no IND_SOURCE for the kexec segment. But the current implementation of kimage_map_segment() assumes that IND_SOURCE pages exist and map them into a contiguous virtual address by vmap(). *** Solution *** If IMA segment is allocated in the CMA area, use its page_address() directly.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 07d24902977e4704fab8472981e73a0ad6dfa1fd , < a843e4155c83211c55b1b6cc17eab27a6a2c5b6f (git)
Affected: 07d24902977e4704fab8472981e73a0ad6dfa1fd , < a3785ae5d334bb71d47a593d54c686a03fb9d136 (git)
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    Linux Linux Affected: 6.17
Unaffected: 0 , < 6.17 (semver)
Unaffected: 6.18.4 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nkernel/kexec: fix IMA when allocation happens in CMA area\n\n*** Bug description ***\n\nWhen I tested kexec with the latest kernel, I ran into the following warning:\n\n[   40.712410] ------------[ cut here ]------------\n[   40.712576] WARNING: CPU: 2 PID: 1562 at kernel/kexec_core.c:1001 kimage_map_segment+0x144/0x198\n[...]\n[   40.816047] Call trace:\n[   40.818498]  kimage_map_segment+0x144/0x198 (P)\n[   40.823221]  ima_kexec_post_load+0x58/0xc0\n[   40.827246]  __do_sys_kexec_file_load+0x29c/0x368\n[...]\n[   40.855423] ---[ end trace 0000000000000000 ]---\n\n*** How to reproduce ***\n\nThis bug is only triggered when the kexec target address is allocated in\nthe CMA area. If no CMA area is reserved in the kernel, use the \"cma=\"\noption in the kernel command line to reserve one.\n\n*** Root cause ***\nThe commit 07d24902977e (\"kexec: enable CMA based contiguous\nallocation\") allocates the kexec target address directly on the CMA area\nto avoid copying during the jump. In this case, there is no IND_SOURCE\nfor the kexec segment.  But the current implementation of\nkimage_map_segment() assumes that IND_SOURCE pages exist and map them\ninto a contiguous virtual address by vmap().\n\n*** Solution ***\nIf IMA segment is allocated in the CMA area, use its page_address()\ndirectly."
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        "dateUpdated": "2026-02-09T08:35:36.533Z",
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    "dateReserved": "2026-01-13T15:30:19.656Z",
    "dateUpdated": "2026-02-09T08:35:36.533Z",
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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