VulnerabilityPublished 25 Sep 2026

CVE-2024-56531: kernel security update

Affects Linux kernelSource GCVE Database

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Mentioned vulnerabilities

CVE-2024-56614

Not known to be exploited · CVSS 9.8 Critical : upgrade to 5.10.0-334.0.0.235.oe2203sp4 as a priority.

Data as of 7 Nov 2026, 23:23 UTC

CVSS 3.1 base score

9.8Critical

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.2% chance of exploitation in 30 days – higher than 13% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 5.10.0-334.0.0.235.oe2203sp4

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

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: High: There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component.
Availability: High: There is total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 25 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 8 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Linux kernel to 5.10.0-334.0.0.235.oe2203sp4.

Affected software

Product	Affected	Fixed in
openEuler 22.03-LTS-SP4kernel`pkg:rpm/openEuler/kernel&distro=openEuler-22.03-LTS-SP4`Other threats	Affected <5.10.0-334.0.0.235.oe2203sp4	Fixed in 5.10.0-334.0.0.235.oe2203sp4

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A patch is available for these vulnerabilities. Users should update affected Linux kernel versions to 5.10.0-334.0.0.235.oe2203sp4 or later to apply the official fixes. No additional mitigations are indicated by the vendor advisory.

Description

The Linux Kernel, the operating system core itself. Security Fix(es): In the Linux kernel, the following vulnerability has been resolved:ALSA: caiaq: Use snd_card_free_when_closed() at disconnectionThe USB disconnect callback is supposed to be short and not too-longwaiting. OTOH, the current code uses snd_card_free() atdisconnection, but this waits for the close of all used fds, hence itcan take long. It eventually blocks the upper layer USB ioctls, whichmay trigger a soft lockup.An easy workaround is to replace snd_card_free() withsnd_card_free_when_closed(). This variant returns immediately whilethe release of resources is done asynchronously by the card devicerelease at the last close.This patch also splits the code to the disconnect and the free phases;the former is called immediately at the USB disconnect callback whilethe latter is called from the card destructor.(CVE-2024-56531) In the Linux kernel, the following vulnerability has been resolved:xsk: fix OOB map writes when deleting elementsJordy says: In the xsk_map_delete_elem function an unsigned integer(map->max_entries) is compared with a user-controlled signed integer(k). Due to implicit type conversion, a large unsigned value formap->max_entries can bypass the intended bounds check: if (k >= map->max_entries) return -EINVAL;This allows k to hold a negative value (between -2147483648 and -2),which is then used as an array index in m->xsk_map[k], which resultsin an out-of-bounds access. spin_lock_bh(&m->lock); map_entry = &m->xsk_map[k]; // Out-of-bounds map_entry old_xs = unrcu_pointer(xchg(map_entry, NULL)); // Oob write if (old_xs) xsk_map_sock_delete(old_xs, map_entry); spin_unlock_bh(&m->lock);The xchg operation can then be used to cause an out-of-bounds write.Moreover, the invalid map_entry passed to xsk_map_sock_delete can leadto further memory corruption. It indeed results in following splat:[76612.897343] BUG: unable to handle page fault for address: ffffc8fc2e461108[76612.904330] #PF: supervisor write access in kernel mode[76612.909639] #PF: error_code(0x0002) - not-present page[76612.914855] PGD 0 P4D 0[76612.917431] Oops: Oops: 0002 [#1] PREEMPT SMP[76612.921859] CPU: 11 UID: 0 PID: 10318 Comm: a.out Not tainted 6.12.0-rc1+ #470[76612.929189] Hardware name: Intel Corporation S2600WFT/S2600WFT, BIOS SE5C620.86B.02.01.0008.031920191559 03/19/2019[76612.939781] RIP: 0010:xsk_map_delete_elem+0x2d/0x60[76612.944738] Code: 00 00 41 54 55 53 48 63 2e 3b 6f 24 73 38 4c 8d a7 f8 00 00 00 48 89 fb 4c 89 e7 e8 2d bf 05 00 48 8d b4 eb 00 01 00 00 31 ff <48> 87 3e 48 85 ff 74 05 e8 16 ff ff ff 4c 89 e7 e8 3e bc 05 00 31[76612.963774] RSP: 0018:ffffc9002e407df8 EFLAGS: 00010246[76612.969079] RAX: 0000000000000000 RBX: ffffc9002e461000 RCX: 0000000000000000[76612.976323] RDX: 0000000000000001 RSI: ffffc8fc2e461108 RDI: 0000000000000000[76612.983569] RBP: ffffffff80000001 R08: 0000000000000000 R09: 0000000000000007[76612.990812] R10: ffffc9002e407e18 R11: ffff888108a38858 R12: ffffc9002e4610f8[76612.998060] R13: ffff888108a38858 R14: 00007ffd1ae0ac78 R15: ffffc9002e4610c0[76613.005303] FS: 00007f80b6f59740(0000) GS:ffff8897e0ec0000(0000) knlGS:0000000000000000[76613.013517] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033[76613.019349] CR2: ffffc8fc2e461108 CR3: 000000011e3ef001 CR4: 00000000007726f0[76613.026595] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000[76613.033841] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400[76613.041086] PKRU: 55555554[76613.043842] Call Trace:[76613.046331] <TASK>[76613.048468] ? __die+0x20/0x60[76613.051581] ? page_fault_oops+0x15a/0x450[76613.055747] ? search_extable+0x22/0x30[76613.059649] ? search_bpf_extables+0x5f/0x80[76613.063988] ? exc_page_fault+0xa9/0x140[76613.067975] ? asm_exc_page_fault+0x22/0x30[76613.072229] ? xsk_map_delete_elem+0x2d/0x60[76613.076573] ? xsk_map_delete_elem+0x23/0x60[76613.080914] __sys_bpf+0x19b7/0x23c0[76613.084555] __x64_sys_bpf+0x1a/0x20[76613.088194] do_syscall_64+0x37/0xb0[76613.091832] entry_SYSCALL_64_after_hwframe+0x4b/0x53[76613.096962] RIP: 0033:0x7f80b6d1e88d[76613.100592] Code: 5b 41 5c c3 66 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 73 b5 0f 00 f7 d8 64 89 01 48[76613.119631] RSP: 002b:00007ffd1ae0ac68 EFLAGS: 00000206 ORIG_RAX: 0000000000000141[76613.131330] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f80b6d1e88d[76613.142632] RDX: 0000000000000098 RSI: 00007ffd1ae0ad20 RDI: 0000000000000003[76613.153967] RBP: 00007ffd1ae0adc0 R08: 0000000000000000 R09: 0000000000000000[76613.166030] R10: 00007f80b6f77040 R11: 0000000000000206 R12: 00007ffd1ae0aed8[76613.177130] R13: 000055ddf42ce1e9 R14: 000055ddf42d0d98 R15: 00---truncated---(CVE-2024-56614) In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Fix potential

Impact

Exploitation of these vulnerabilities can cause system instability including soft lockups and kernel crashes due to memory corruption. The ALSA issue can block USB IOCTL operations, potentially freezing parts of the system. The xsk_map_delete_elem flaw allows out-of-bounds writes that can corrupt kernel memory, leading to denial of service or other unpredictable behavior. The CVSS score of 9.8 reflects high impact on confidentiality, integrity, and availability.

Summary

The Linux kernel contained a vulnerability (CVE-2024-56531) in the ALSA caiaq USB disconnect callback where snd_card_free() was used, causing long waits and potential soft lockups due to blocking on file descriptor closures. The fix replaces this with snd_card_free_when_closed(), which frees resources asynchronously. Another vulnerability (CVE-2024-56614) involved an out-of-bounds write in the xsk_map_delete_elem function due to a signed integer index bypassing an unsigned bounds check, leading to memory corruption and kernel panics. These issues have been fixed in kernel versions 5.10.0-334.0.0.235.oe2203sp4 and later.

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Affected software

Description

AI analysisMachine-generated, updated 25 Sep 2026, 04:46 UTC

Technical details

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