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CVE-2026-64415— mm/swap: add cond_resched() in swap_reclaim_full_clusters to prevent softlockup

AI Predicted 5.5 Difficulty: Moderate EPSS 0.17% · P6

Possible ATT&CK Techniques 1AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 10

VendorProductVersion RangeStatus
LinuxLinux5168a68eb78fa1c67a8b2d31d0642c7fd866cc12< 60cbe67d1342f34b66df1c2ee328e3cd333767d7affected
5168a68eb78fa1c67a8b2d31d0642c7fd866cc12< 69c0e6246575b780ae0d3f411c749bcf13c221f3affected
5168a68eb78fa1c67a8b2d31d0642c7fd866cc12< 2a55fdf9f746a1a6ced7fd62ea1080b8a917e0b0affected
5168a68eb78fa1c67a8b2d31d0642c7fd866cc12< 66366d291f666ddeda5f8c84f253e308de3e6b55affected
6.12affected
< 6.12unaffected
6.12.96≤ 6.12.*unaffected
6.18.39≤ 6.18.*unaffected
… +2 more rows
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I. Basic Information for CVE-2026-64415

Vulnerability Information
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Vulnerability Title
mm/swap: add cond_resched() in swap_reclaim_full_clusters to prevent softlockup
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: mm/swap: add cond_resched() in swap_reclaim_full_clusters to prevent softlockup We hit a real softlockup in an internal stress test environment. The workload was LTP memory/swap stress on a large arm64 machine, with 320 CPUs, about 1TB memory and an 8.6GB swap device. The system was under heavy load and the swap device had a large number of full clusters. The softlockup was triggered during a stress test after about 3 days. So, add periodic cond_resched() calls during large full_clusters reclaim operations to prevent softlockup issues. Detailed call trace as follow: PID: 3817773 TASK: ffff0883bb28b780 CPU: 48 COMMAND: "kworker/48:7" #0 [ffff800080183d10] __crash_kexec at ffffa4c1361e5de4 #1 [ffff800080183d90] panic at ffffa4c1360d5e9c #2 [ffff800080183e20] watchdog_timer_fn at ffffa4c136231fa8 ... #16 [ffff8000c4ad3cb0] swap_cache_del_folio at ffffa4c1363e1614 #17 [ffff8000c4ad3ce0] __try_to_reclaim_swap at ffffa4c1363e4bfc #18 [ffff8000c4ad3d40] swap_reclaim_full_clusters at ffffa4c1363e5474 #19 [ffff8000c4ad3da0] swap_reclaim_work at ffffa4c1363e550c #20 [ffff8000c4ad3dc0] process_one_work at ffffa4c136102edc #21 [ffff8000c4ad3e10] worker_thread at ffffa4c136103398 #22 [ffff8000c4ad3e70] kthread at ffffa4c13610d95c
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel 6.12版本存在安全漏洞，该漏洞源于在swap_reclaim_full_clusters过程中缺少cond_resched，可能导致系统软锁。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux 5168a68eb78fa1c67a8b2d31d0642c7fd866cc12 ~ 60cbe67d1342f34b66df1c2ee328e3cd333767d7 -
LinuxLinux 6.12 -

II. Public POCs for CVE-2026-64415

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III. Intelligence Information for CVE-2026-64415

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Patches & Fixes for CVE-2026-64415 (4)

Same Patch Batch · Linux · 2026-07-25 · 274 CVEs total

CVE-2026-643559.8 CRITICALbpf: Reject fragmented frames in devmap
CVE-2026-644599.8 CRITICALtcp: restore RCU grace period in tcp_ao_destroy_sock
CVE-2026-643039.8 CRITICALspi: fsl-lpspi: terminate the RX channel on TX prepare failure path
CVE-2026-644399.8 CRITICALcrypto: krb5 - filter out async aead implementations at alloc
CVE-2026-644109.8 CRITICALnetfilter: flowtable: IPIP tunnel hardware offload is not yet support
CVE-2026-643999.8 CRITICALksmbd: add permission checks for FSCTL_DUPLICATE_EXTENTS_TO_FILE
CVE-2026-643979.8 CRITICALksmbd: serialize QUERY_DIRECTORY requests per file
CVE-2026-643919.8 CRITICALksmbd: use opener credentials for ADS I/O
CVE-2026-643879.8 CRITICALsmb: client: fix query directory replay double-free
CVE-2026-643869.8 CRITICALsmb: client: fix query_info() replay double-free
CVE-2026-643859.8 CRITICALsmb: client: fix double-free in SMB2_ioctl() replay
CVE-2026-643839.8 CRITICALsmb: client: fix double-free in SMB2_flush() replay
CVE-2026-643849.8 CRITICALsmb: client: fix change notify replay double-free
CVE-2026-642689.8 CRITICALRDMA/siw: bound Read Response placement to the RREAD length
CVE-2026-645239.8 CRITICALnet/handshake: Take a long-lived file reference at submit
CVE-2026-642699.1 CRITICALRDMA/rtrs-srv: Bound RDMA-Write length to chunk size in rdma_write_sg
CVE-2026-642579.1 CRITICALsmb: client: reject overlapping data areas in SMB2 responses
CVE-2026-643199.1 CRITICALnvmet-auth: validate reply message payload bounds against transfer length
CVE-2026-643209.1 CRITICALnvmet: fix pre-auth out-of-bounds heap read in Discovery Get Log Page
CVE-2026-643939.1 CRITICALksmbd: run set info with opener credentials

Showing top 20 of 274 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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