CVE-2022-49916 Vulnerability Analysis & Exploit Details

CVE-2022-49916
Vulnerability Scoring

5.5

/10

Significant Risk

Security assessments indicate that CVE-2022-49916 presents a notable risk, potentially requiring prompt mitigation.

Attack Complexity Details

Attack Complexity: Low
Exploits can be performed without significant complexity or special conditions.
Attack Vector: Local
Vulnerability requires local system access.
Privileges Required: Low
Some privileges are necessary to exploit the vulnerability.
Scope: Unchanged
Exploit remains within the originally vulnerable component.
User Interaction: None
No user interaction is necessary for exploitation.

CVE-2022-49916 Details

Status: Analyzed

Last updated: 🕐 07 May 2025, 13:27 UTC
Originally published on: 🕒 01 May 2025, 15:16 UTC

Time between publication and last update: 5 days

CVSS Release: version 3

CVSS3 Source

nvd@nist.gov

CVSS3 Type

Primary

CVSS3 Vector

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

CVE-2022-49916 Vulnerability Summary

CVE-2022-49916: In the Linux kernel, the following vulnerability has been resolved: rose: Fix NULL pointer dereference in rose_send_frame() The syzkaller reported an issue: KASAN: null-ptr-deref in range [0x0000000000000380-0x0000000000000387] CPU: 0 PID: 4069 Comm: kworker/0:15 Not tainted 6.0.0-syzkaller-02734-g0326074ff465 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Workqueue: rcu_gp srcu_invoke_callbacks RIP: 0010:rose_send_frame+0x1dd/0x2f0 net/rose/rose_link.c:101 Call Trace: <IRQ> rose_transmit_clear_request+0x1d5/0x290 net/rose/rose_link.c:255 rose_rx_call_request+0x4c0/0x1bc0 net/rose/af_rose.c:1009 rose_loopback_timer+0x19e/0x590 net/rose/rose_loopback.c:111 call_timer_fn+0x1a0/0x6b0 kernel/time/timer.c:1474 expire_timers kernel/time/timer.c:1519 [inline] __run_timers.part.0+0x674/0xa80 kernel/time/timer.c:1790 __run_timers kernel/time/timer.c:1768 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1803 __do_softirq+0x1d0/0x9c8 kernel/softirq.c:571 [...] </IRQ> It triggers NULL pointer dereference when 'neigh->dev->dev_addr' is called in the rose_send_frame(). It's the first occurrence of the `neigh` is in rose_loopback_timer() as `rose_loopback_neigh', and the 'dev' in 'rose_loopback_neigh' is initialized sa nullptr. It had been fixed by commit 3b3fd068c56e3fbea30090859216a368398e39bf ("rose: Fix Null pointer dereference in rose_send_frame()") ever. But it's introduced by commit 3c53cd65dece47dd1f9d3a809f32e59d1d87b2b8 ("rose: check NULL rose_loopback_neigh->loopback") again. We fix it by add NULL check in rose_transmit_clear_request(). When the 'dev' in 'neigh' is NULL, we don't reply the request and just clear it. syzkaller don't provide repro, and I provide a syz repro like: r0 = syz_init_net_socket$bt_sco(0x1f, 0x5, 0x2) ioctl$sock_inet_SIOCSIFFLAGS(r0, 0x8914, &(0x7f0000000180)={'rose0\x00', 0x201}) r1 = syz_init_net_socket$rose(0xb, 0x5, 0x0) bind$rose(r1, &(0x7f00000000c0)=@full={0xb, @dev, @null, 0x0, [@null, @null, @netrom, @netrom, @default, @null]}, 0x40) connect$rose(r1, &(0x7f0000000240)=@short={0xb, @dev={0xbb, 0xbb, 0xbb, 0x1, 0x0}, @remote={0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0x1}, 0x1, @netrom={0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0x0, 0x0}}, 0x1c)

Assessing the Risk of CVE-2022-49916

Access Complexity Graph

The exploitability of CVE-2022-49916 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).

Exploitability Analysis for CVE-2022-49916

CVE-2022-49916 presents an accessible attack vector with minimal effort required. Restricting access controls and implementing security updates are critical to reducing exploitation risks.

Understanding AC and PR

A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.

Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.

Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.

CVSS Score Breakdown Chart

Above is the CVSS Sub-score Breakdown for CVE-2022-49916, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.

CIA Impact Analysis

Below is the Impact Analysis for CVE-2022-49916, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

Confidentiality: None
CVE-2022-49916 has no significant impact on data confidentiality.
Integrity: None
CVE-2022-49916 poses no threat to data integrity.
Availability: High
CVE-2022-49916 can disrupt system operations, potentially causing complete denial of service (DoS).

CVE-2022-49916 References

External References

CWE Common Weakness Enumeration

CWE-476

Vulnerable Configurations

cpe:2.3:o:linux:linux_kernel:4.9.327:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.9.327:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.9.328:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.9.328:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.9.329:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.9.329:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.9.330:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.9.330:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.9.331:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.9.331:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.9.332:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.9.332:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.14.292:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.14.292:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.14.293:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.14.293:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.14.294:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.14.294:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.14.295:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.14.295:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.14.296:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.14.296:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.14.297:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.14.297:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.14.298:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.14.298:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.19.257:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.19.257:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.19.258:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.19.258:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.19.259:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.19.259:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.19.260:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.19.260:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.19.261:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.19.261:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.19.262:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.19.262:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.19.263:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.19.263:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.19.264:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.19.264:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.4.212:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.4.212:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.4.213:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.4.213:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.4.214:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.4.214:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.4.215:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.4.215:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.4.216:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.4.216:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.4.217:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.4.217:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.4.218:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.4.218:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.4.219:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.4.219:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.4.220:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.4.220:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.4.221:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.4.221:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.4.222:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.4.222:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.4.223:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.4.223:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.10.140:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.10.140:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.10.141:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.10.141:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.10.142:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.10.142:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.10.143:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.10.143:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.10.144:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.10.144:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.10.145:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.10.145:*:*:*:*:*:*:*
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cpe:2.3:o:linux:linux_kernel:5.10.147:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.10.147:*:*:*:*:*:*:*
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cpe:2.3:o:linux:linux_kernel:5.10.148:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.10.149:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.10.149:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.10.150:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.10.150:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.10.151:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.10.151:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.10.152:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.10.152:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.10.153:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.10.153:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.64:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.64:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.65:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.65:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.66:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.66:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.67:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.67:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.68:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.68:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.69:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.69:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.70:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.70:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.71:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.71:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.72:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.72:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.73:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.73:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.74:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.74:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.75:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.75:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.76:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.76:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.77:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.77:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19.6:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19.6:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19.7:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19.7:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19.8:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19.8:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19.9:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19.9:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19.10:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19.10:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19.11:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19.11:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19.12:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19.12:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19.13:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19.13:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19.14:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19.14:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19.15:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19.15:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19.16:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19.16:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19.17:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19.17:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19:rc7:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19:rc7:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19:rc8:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19:rc8:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.0:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.0:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.0.1:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.0.1:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.0.2:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.0.2:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.0.3:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.0.3:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.0.4:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.0.4:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.0.5:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.0.5:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.0.6:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.0.6:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.0.7:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.0.7:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:*

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