CVE-2025-71236 [Medium] | Security Vulnerability in Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Validate sp before freeing associated memory System crash with the following signature [154563.214890] nvme nvme2: NVME-FC{1}: controller connect complete [154564.169363] qla2xxx [0000:b0:00.1]-3002:2: nvme: Sched: Set ZIO exchange threshold to 3. [154564.169405] qla2xxx [0000:b0:00.1]-ffffff:2: SET ZIO Activity exchange threshold to 5. [154565.539974] qla2xxx [0000:b0:00.1]-5013:2: RSCN database changed – 0078 0080 0000. [154565.545744] qla2xxx [0000:b0:00.1]-5013:2: RSCN database changed – 0078 00a0 0000. [154565.545857] qla2xxx [0000:b0:00.1]-11a2:2: FEC=enabled (data rate). [154565.552760] qla2xxx [0000:b0:00.1]-11a2:2: FEC=enabled (data rate). [154565.553079] BUG: kernel NULL pointer dereference, address: 00000000000000f8 [154565.553080] #PF: supervisor read access in kernel mode [154565.553082] #PF: error_code(0x0000) - not-present page [154565.553084] PGD 80000010488ab067 P4D 80000010488ab067 PUD 104978a067 PMD 0 [154565.553089] Oops: 0000 1 PREEMPT SMP PTI [154565.553092] CPU: 10 PID: 858 Comm: qla2xxx_2_dpc Kdump: loaded Tainted: G OE ------- --- 5.14.0-503.11.1.el9_5.x86_64 #1 [154565.553096] Hardware name: HPE Synergy 660 Gen10/Synergy 660 Gen10 Compute Module, BIOS I43 09/30/2024 [154565.553097] RIP: 0010:qla_fab_async_scan.part.0+0x40b/0x870 [qla2xxx] [154565.553141] Code: 00 00 e8 58 a3 ec d4 49 89 e9 ba 12 20 00 00 4c 89 e6 49 c7 c0 00 ee a8 c0 48 c7 c1 66 c0 a9 c0 bf 00 80 00 10 e8 15 69 00 00 <4c> 8b 8d f8 00 00 00 4d 85 c9 74 35 49 8b 84 24 00 19 00 00 48 8b [154565.553143] RSP: 0018:ffffb4dbc8aebdd0 EFLAGS: 00010286 [154565.553145] RAX: 0000000000000000 RBX: ffff8ec2cf0908d0 RCX: 0000000000000002 [154565.553147] RDX: 0000000000000000 RSI: ffffffffc0a9c896 RDI: ffffb4dbc8aebd47 [154565.553148] RBP: 0000000000000000 R08: ffffb4dbc8aebd45 R09: 0000000000ffff0a [154565.553150] R10: 0000000000000000 R11: 000000000000000f R12: ffff8ec2cf0908d0 [154565.553151] R13: ffff8ec2cf090900 R14: 0000000000000102 R15: ffff8ec2cf084000 [154565.553152] FS: 0000000000000000(0000) GS:ffff8ed27f800000(0000) knlGS:0000000000000000 [154565.553154] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [154565.553155] CR2: 00000000000000f8 CR3: 000000113ae0a005 CR4: 00000000007706f0 [154565.553157] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [154565.553158] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [154565.553159] PKRU: 55555554 [154565.553160] Call Trace: [154565.553162] <TASK> [154565.553165] ? show_trace_log_lvl+0x1c4/0x2df [154565.553172] ? show_trace_log_lvl+0x1c4/0x2df [154565.553177] ? qla_fab_async_scan.part.0+0x40b/0x870 [qla2xxx] [154565.553215] ? __die_body.cold+0x8/0xd [154565.553218] ? page_fault_oops+0x134/0x170 [154565.553223] ? snprintf+0x49/0x70 [154565.553229] ? exc_page_fault+0x62/0x150 [154565.553238] ? asm_exc_page_fault+0x22/0x30 Check for sp being non NULL before freeing any associated memory

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.02%	0.12%	+0.10%
2	2026-02-19	—	0.02%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.02%

0.12%

+0.10%

2026-02-19

—

0.02%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
5.5	3.1	MEDIUM	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H` Click to expand Attack vector (AV:L) They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:L) A normal user session is enough; they don’t have to be admin. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	1.8	3.6	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

5.5

3.1

MEDIUM

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

Attack vector (AV:L): They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L): A normal user session is enough; they don’t have to be admin.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

1.8

3.6

[email protected]

OS Trackers for CVE-2025-71236

vendor	priority	summary	link
`debian`	not yet assigned	CVE-2025-71236 not yet assigned priority: Debian including 2 source packages (linux, linux-6.1), 6 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 6.	https://security-tracker.debian.org/tracker/CVE-2025-71236
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2025-71236
`suse`	medium	CVE-2025-71236 severity moderate: SUSE including 427 source package names (2.1.3-6.124:kernel-default-base-6.4.0-40.1.21.17, 2.1.3-7.105:kernel-default-6.4.0-40.1, …), 710 product×package rows across 54 product lines (Container suse/sl-micro/6.0/base-os-container, Container suse/sl-micro/6.0/kvm-os-container, … (54 product lines)): Fixed 345, Known Affected 231, Known Not Affected 109, First Fixed 25.	https://www.suse.com/security/cve/CVE-2025-71236/
`ubuntu`	medium	CVE-2025-71236 medium priority: Ubuntu including 157 source packages (linux, linux-allwinner-5.19, …), 1256 status rows across 8 suites (bionic, focal, jammy, noble, questing, trusty, upstream, xenial): DNE 871, ignored 169, needed 109, released 83, not-affected 24.	https://ubuntu.com/security/CVE-2025-71236

Affected software / configurations for CVE-2025-71236

Vendor	Product	Version	Raw CPE
linux	linux_kernel	>= 4.16, < 5.10.251	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.11, < 5.15.201	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.16, < 6.1.164	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.2, < 6.6.125	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.7, < 6.12.72	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.13, < 6.18.11	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.19, < 6.19.1	cpe:2.3:o:linux:linux_kernel::::::::

References for CVE-2025-71236

URL	Tags
https://git.kernel.org/stable/c/044131fce27749cb6ea986baf861fbe63c6d8a17	Patch
https://git.kernel.org/stable/c/1a9585e4c58d1f1662b3ca46110ed4f583082ce5	Patch
https://git.kernel.org/stable/c/40ae93668226b610edb952c6036f607a61750b57	Patch
https://git.kernel.org/stable/c/85c0890fea6baeba9c4ae6ae090182cbb1a93fb2	Patch
https://git.kernel.org/stable/c/944378ead9a48d5d50e9e3cc85e4cdb911c37ca1	Patch
https://git.kernel.org/stable/c/949010291bb941d53733ed08a33454254d9afb1b	Patch
https://git.kernel.org/stable/c/a46f81c1e627437de436e517f5fd4b725c15a1e6	Patch
https://git.kernel.org/stable/c/b6df15aec8c3441357d4da0eaf4339eb20f5999f	Patch

URL

CVE-2025-71236 | scsi: qla2xxx: Validate sp before freeing associated memory

Exploit prediction scoring system (EPSS) score for CVE-2025-71236

Common vulnerability scoring system (CVSS) metrics for CVE-2025-71236

Weakness enumeration for CVE-2025-71236

OS Trackers for CVE-2025-71236

Affected software / configurations for CVE-2025-71236

References for CVE-2025-71236