PCI: Check ROM header and data structure addr before accessing
Summary
| CVE | CVE-2026-72487 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-15 06:22:22 UTC |
| Updated | 2026-08-15 06:22:22 UTC |
| Description | In the Linux kernel, the following vulnerability has been resolved: PCI: Check ROM header and data structure addr before accessing We meet a crash when running stress-ng on x86_64 machine: BUG: unable to handle page fault for address: ffa0000007f40000 RIP: 0010:pci_get_rom_size+0x52/0x220 Call Trace: <TASK> pci_map_rom+0x80/0x130 pci_read_rom+0x4b/0xe0 kernfs_file_read_iter+0x96/0x180 vfs_read+0x1b1/0x300 Our analysis reveals that the ROM space's start address is 0xffa0000007f30000, and size is 0x10000. Because of broken ROM space, before calling readl(pds), the pds's value is 0xffa0000007f3ffff, which is already pointed to the ROM space end, invoking readl() would read 4 bytes therefore cause an out-of-bounds access and trigger a crash. Fix this by adding image header and data structure checking. We also found another crash on arm64 machine: Unable to handle kernel paging request at virtual address ffff8000dd1393ff Mem abort info: ESR = 0x0000000096000021 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x21: alignment fault The call trace is the same with x86_64, but the crash reason is that the data structure addr is not aligned with 4, and arm64 machine report "alignment fault". Fix this by adding alignment checking. [bhelgaas: shorten function names, wrap comments] |
Risk And Classification
EPSS: 0.002150000 probability, percentile 0.121270000 (date 2026-08-15)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 47b975d234eac39f3a72e5496d5f6158d8b806d1 cd5b242d5848369b9e957340a7e30adee7b6763d git | Not specified |
| CNA | Linux | Linux | affected 47b975d234eac39f3a72e5496d5f6158d8b806d1 4997873e3abbad47a9e1e4abd05f045f77a74f22 git | Not specified |
| CNA | Linux | Linux | affected 47b975d234eac39f3a72e5496d5f6158d8b806d1 724042f8f98d2594b9d164549fd4292c6bd58120 git | Not specified |
| CNA | Linux | Linux | affected 47b975d234eac39f3a72e5496d5f6158d8b806d1 1d495446ec7ace5b61da366ffb161ee8319dd9a2 git | Not specified |
| CNA | Linux | Linux | affected 47b975d234eac39f3a72e5496d5f6158d8b806d1 721ad5b72448b5065ed309017ab563205f162404 git | Not specified |
| CNA | Linux | Linux | affected 47b975d234eac39f3a72e5496d5f6158d8b806d1 538796b807fcfb81b2ce40cc97a614fd8588feb5 git | Not specified |
| CNA | Linux | Linux | affected 4.5 | Not specified |
| CNA | Linux | Linux | unaffected 4.5 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.178 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.145 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.97 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.40 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1.5 7.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2-rc1 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/4997873e3abbad47a9e1e4abd05f045f77a74f22 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/724042f8f98d2594b9d164549fd4292c6bd58120 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/1d495446ec7ace5b61da366ffb161ee8319dd9a2 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/cd5b242d5848369b9e957340a7e30adee7b6763d | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/538796b807fcfb81b2ce40cc97a614fd8588feb5 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/721ad5b72448b5065ed309017ab563205f162404 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.