{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2022-50647", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-50647", "idYear": 2022, "status": "PUBLISHED", "publishedAt": "2025-12-09T00:00:21.501Z", "updatedAt": "2026-05-11T19:22:53.598Z", "importedAt": "2026-10-24T01:56:49.724Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "RISC-V: Make port I/O string accessors actually work", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nRISC-V: Make port I/O string accessors actually work\n\nFix port I/O string accessors such as `insb', `outsb', etc. which use\nthe physical PCI port I/O address rather than the corresponding memory\nmapping to get at the requested location, which in turn breaks at least\naccesses made by our parport driver to a PCIe parallel port such as:\n\nPCI parallel port detected: 1415:c118, I/O at 0x1000(0x1008), IRQ 20\nparport0: PC-style at 0x1000 (0x1008), irq 20, using FIFO [PCSPP,TRISTATE,COMPAT,EPP,ECP]\n\ncausing a memory access fault:\n\nUnable to handle kernel access to user memory without uaccess routines at virtual address 0000000000001008\nOops [#1]\nModules linked in:\nCPU: 1 PID: 350 Comm: cat Not tainted 6.0.0-rc2-00283-g10d4879f9ef0-dirty #23\nHardware name: SiFive HiFive Unmatched A00 (DT)\nepc : parport_pc_fifo_write_block_pio+0x266/0x416\n ra : parport_pc_fifo_write_block_pio+0xb4/0x416\nepc : ffffffff80542c3e ra : ffffffff80542a8c sp : ffffffd88899fc60\n gp : ffffffff80fa2700 tp : ffffffd882b1e900 t0 : ffffffd883d0b000\n t1 : ffffffffff000002 t2 : 4646393043330a38 s0 : ffffffd88899fcf0\n s1 : 0000000000001000 a0 : 0000000000000010 a1 : 0000000000000000\n a2 : ffffffd883d0a010 a3 : 0000000000000023 a4 : 00000000ffff8fbb\n a5 : ffffffd883d0a001 a6 : 0000000100000000 a7 : ffffffc800000000\n s2 : ffffffffff000002 s3 : ffffffff80d28880 s4 : ffffffff80fa1f50\n s5 : 0000000000001008 s6 : 0000000000000008 s7 : ffffffd883d0a000\n s8 : 0004000000000000 s9 : ffffffff80dc1d80 s10: ffffffd8807e4000\n s11: 0000000000000000 t3 : 00000000000000ff t4 : 393044410a303930\n t5 : 0000000000001000 t6 : 0000000000040000\nstatus: 0000000200000120 badaddr: 0000000000001008 cause: 000000000000000f\n[] parport_pc_compat_write_block_pio+0xfe/0x200\n[] parport_write+0x46/0xf8\n[] lp_write+0x158/0x2d2\n[] vfs_write+0x8e/0x2c2\n[] ksys_write+0x52/0xc2\n[] sys_write+0xe/0x16\n[] ret_from_syscall+0x0/0x2\n---[ end trace 0000000000000000 ]---\n\nFor simplicity address the problem by adding PCI_IOBASE to the physical\naddress requested in the respective wrapper macros only, observing that\nthe raw accessors such as `__insb', `__outsb', etc. are not supposed to\nbe used other than by said macros. Remove the cast to `long' that is no\nlonger needed on `addr' now that it is used as an offset from PCI_IOBASE\nand add parentheses around `addr' needed for predictable evaluation in\nmacro expansion. No need to make said adjustments in separate changes\ngiven that current code is gravely broken and does not ever work.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "fab957c11efe2f405e08b9f0d080524bc2631428", "status": "affected", "versionType": "git", "lessThan": "2c60db6869fe5213471fcf4fe5704dc29da8b5ee" }, { "version": "fab957c11efe2f405e08b9f0d080524bc2631428", "status": "affected", "versionType": "git", "lessThan": "2ce9fab94b8db61f014e43ddf80dd1524ae6dff4" }, { "version": "fab957c11efe2f405e08b9f0d080524bc2631428", "status": "affected", "versionType": "git", "lessThan": "dc235db7b79a352d07d62e8757ad856dbf1564c1" }, { "version": "fab957c11efe2f405e08b9f0d080524bc2631428", "status": "affected", "versionType": "git", "lessThan": "140b2b92dbefffa7f4f7211a1fd399a6e79e71c4" }, { "version": "fab957c11efe2f405e08b9f0d080524bc2631428", "status": "affected", "versionType": "git", "lessThan": "1acee4616930fc07265cb8e539753a8062daa8e0" }, { "version": "fab957c11efe2f405e08b9f0d080524bc2631428", "status": "affected", "versionType": "git", "lessThan": "9cc205e3c17d5716da7ebb7fa0c985555e95d009" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "4.15", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "4.15" }, { "version": "5.4.220", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.150", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.75", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "5.19.17", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.19.*" }, { "version": "6.0.3", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.0.*" }, { "version": "6.1", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }