CVE-2025-71099

Description

In the Linux kernel, the following vulnerability has been resolved: drm/xe/oa: Fix potential UAF in xe_oa_add_config_ioctl() In xe_oa_add_config_ioctl(), we accessed oa_config->id after dropping metrics_lock. Since this lock protects the lifetime of oa_config, an attacker could guess the id and call xe_oa_remove_config_ioctl() with perfect timing, freeing oa_config before we dereference it, leading to a potential use-after-free. Fix this by caching the id in a local variable while holding the lock. v2: (Matt A) - Dropped mutex_unlock(&oa->metrics_lock) ordering change from xe_oa_remove_config_ioctl() (cherry picked from commit 28aeaed130e8e587fd1b73b6d66ca41ccc5a1a31)

CVSS Details

CVSS Score

7.8

Severity

HIGH

CVSS Vector

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

Configurations (Affected Products)

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

cpe:2.3:o:linux:linux_kernel:6.11:-:*:*:*:*:*:* - VULNERABLE

cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:* - VULNERABLE

cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:* - VULNERABLE

Linux内核 < 修复版本（commit 28aeaed130e8e587fd1b73b6d66ca41ccc5a1a31）

受影响的内核版本包含drm/xe/oa模块的Intel Xe GPU驱动

PoC / Exploit Code

⚠ For Security Research Only

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

python

#include <stdio.h>
#include <pthread.h>
#include <unistd.h>

// PoC概念验证：演示CVE-2025-71099的竞态条件
// 注意：这是概念性代码，实际利用需要内核调试接口和精确的时序控制

void *attacker_thread(void *arg) {
    // 攻击线程：尝试在目标线程释放锁后立即移除配置
    usleep(100); // 微调时序
    
    // 尝试调用xe_oa_remove_config_ioctl()猜测并移除配置
    // 实际环境中需要通过DRM IOCTL接口
    printf("[Attacker] Attempting to trigger UAF race condition\n");
    
    return NULL;
}

int main() {
    pthread_t t1, t2;
    
    printf("[+] CVE-2025-71099 PoC - Use-After-Free in xe_oa_add_config_ioctl\n");
    printf("[+] Target: Linux kernel drm/xe/oa module\n");
    
    // 创建攻击线程
    pthread_create(&t1, NULL, attacker_thread, NULL);
    
    // 目标线程执行有漏洞的操作
    // 实际环境中通过DRM IOCTL调用xe_oa_add_config_ioctl
    printf("[Target] Calling xe_oa_add_config_ioctl\n");
    
    pthread_join(t1, NULL);
    
    printf("[+] Race condition window demonstrated\n");
    printf("[!] In real exploitation, this could lead to kernel crash or privilege escalation\n");
    
    return 0;
}

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-71099
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-71099
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-71099/
[4] VulDB https://vuldb.com/cve/CVE-2025-71099
[5] https://git.kernel.org/stable/c/7cdb9a9da935c687563cc682155461fef5f9b48d
[6] https://git.kernel.org/stable/c/c6d30b65b7a44dac52ad49513268adbf19eab4a2
[7] https://git.kernel.org/stable/c/dcb171931954c51a1a7250d558f02b8f36570783

Raw JSON Data

JSON

{"cve": {"id": "CVE-2025-71099", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2026-01-13T16:16:09.820", "lastModified": "2026-03-25T16:55:40.777", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/oa: Fix potential UAF in xe_oa_add_config_ioctl()\n\nIn xe_oa_add_config_ioctl(), we accessed oa_config->id after dropping\nmetrics_lock. Since this lock protects the lifetime of oa_config, an\nattacker could guess the id and call xe_oa_remove_config_ioctl() with\nperfect timing, freeing oa_config before we dereference it, leading to\na potential use-after-free.\n\nFix this by caching the id in a local variable while holding the lock.\n\nv2: (Matt A)\n- Dropped mutex_unlock(&oa->metrics_lock) ordering change from\n xe_oa_remove_config_ioctl()\n\n(cherry picked from commit 28aeaed130e8e587fd1b73b6d66ca41ccc5a1a31)"}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ndrm/xe/oa: Corrige un potencial uso después de liberación en xe_oa_add_config_ioctl()\n\nEn xe_oa_add_config_ioctl(), accedimos a oa_config->id después de liberar metrics_lock. Dado que este bloqueo protege la vida útil de oa_config, un atacante podría adivinar el id y llamar a xe_oa_remove_config_ioctl() con una sincronización perfecta, liberando oa_config antes de que lo desreferenciemos, lo que lleva a un potencial uso después de liberación.\n\nEsto se corrige al almacenar en caché el id en una variable local mientras se mantiene el bloqueo.\n\nv2: (Matt A)\n- Se eliminó el cambio de orden de mutex_unlock(&oa->metrics_lock) de xe_oa_remove_config_ioctl()\n\n(cherry picked from commit 28aeaed130e8e587fd1b73b6d66ca41ccc5a1a31)"}], "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:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-416"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11.1", "versionEndExcluding": "6.12.64", "matchCriteriaId": "9346F73C-1D95-40EF-8556-34B0701B89B0"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "6.18.4", "matchCriteriaId": "DC988EA0-0E32-457A-BF95-89BEB31A227B"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:6.11:-:*:*:*:*:*:*", "matchCriteriaId": "4770BA57-3F3F-493B-8608-EC3B25254949"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*", "matchCriteriaId": "17B67AA7-40D6-4AFA-8459-F200F3D7CFD1"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*", "matchCriteriaId": "C47E4CC9-C826-4FA9-B014-7FE3D9B318B2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*", "matchCriteriaId": "F71D92C0-C023-48BD-B3B6-70B638EEE298"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*", "matchCriteriaId": "13580667-0A98-40CC-B29F-D12790B91BDB"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*", "matchCriteriaId": "CAD1FED7-CF48-47BF-AC7D-7B6FA3C065FC"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*", "matchCriteriaId": "3EF854A1-ABB1-4E93-BE9A-44569EC76C0D"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc7:*:*:*:*:*:*", "matchCriteriaId": "F5DC0CA6-F0AF-4DDF-A882-3DADB9A886A7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc8:*:*:*:*:*:*", "matchCriteriaId": "EB5B7DFC-C36B-45D8-922C-877569FDDF43"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/7cdb9a9da935c687563cc682155461fef5f9b48d", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/c6d30b65b7a44dac52ad49513268adbf19eab4a2", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/dcb171931954c51a1a7250d558f02b8f36570783", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}]}}