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CVE-2026-43289— kexec: derive purgatory entry from symbol

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于kexec加载purgatory时入口点检查可能匹配多个可执行段，可能导致警告触发。

AI Predicted 4.3 Difficulty: Trivial EPSS 0.16% · P5

Affected Version Matrix 27

VendorProduct Version RangeStatus
Linux Linux f368aed4827bd4276c0e3664fb2cb815a8d7caf3< 027797595a108726f4a0a45d225f603b0ffbd22b affected
d38e051ec6fd8650b139d9bc4b0b8b261953b263< 1737d37ae1d2814e6cf0a1af87af3d41f0812b95 affected
013027918a4efa807409fcb356009c117e4d181a< f736032c638a33a243e9126e617788f763d648f9 affected
8652d44f466ad5772e7d1756e9457046189b0dfc< cfccd3b8c51bc57a8a6fcb2fd30453afae5bc0d2 affected
8652d44f466ad5772e7d1756e9457046189b0dfc< 875355152b33436907c2a6d2ffad1431fa86c62b affected
8652d44f466ad5772e7d1756e9457046189b0dfc< 36eb314184a0ae74dd42914b47d2b9fc43be8034 affected
8652d44f466ad5772e7d1756e9457046189b0dfc< 5226570bd252cea2e805a161cb0f75c204c3108a affected
8652d44f466ad5772e7d1756e9457046189b0dfc< 480e1d5c64bb14441f79f2eb9421d5e26f91ea3d affected
… +19 more rows
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I. Basic Information for CVE-2026-43289

Vulnerability Information
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Vulnerability Title
kexec: derive purgatory entry from symbol
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: kexec: derive purgatory entry from symbol kexec_load_purgatory() derives image->start by locating e_entry inside an SHF_EXECINSTR section. If the purgatory object contains multiple executable sections with overlapping sh_addr, the entrypoint check can match more than once and trigger a WARN. Derive the entry section from the purgatory_start symbol when present and compute image->start from its final placement. Keep the existing e_entry fallback for purgatories that do not expose the symbol. WARNING: kernel/kexec_file.c:1009 at kexec_load_purgatory+0x395/0x3c0, CPU#10: kexec/1784 Call Trace: <TASK> bzImage64_load+0x133/0xa00 __do_sys_kexec_file_load+0x2b3/0x5c0 do_syscall_64+0x81/0x610 entry_SYSCALL_64_after_hwframe+0x76/0x7e [me@linux.beauty: move helper to avoid forward declaration, per Baoquan]
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基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于kexec加载purgatory时入口点检查可能匹配多个可执行段，可能导致警告触发。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux f368aed4827bd4276c0e3664fb2cb815a8d7caf3 ~ 027797595a108726f4a0a45d225f603b0ffbd22b -
Linux Linux 6.4 -

II. Public POCs for CVE-2026-43289

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III. Intelligence Information for CVE-2026-43289

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Patches & Fixes for CVE-2026-43289 (8)

Same Patch Batch · Linux · 2026-05-08 · 197 CVEs total

CVE-2026-43341 9.8 CRITICAL net/ipv6: ioam6: prevent schema length wraparound in trace fill
CVE-2026-43402 9.8 CRITICAL kthread: consolidate kthread exit paths to prevent use-after-free
CVE-2026-43414 9.8 CRITICAL scsi: qla2xxx: Completely fix fcport double free
CVE-2026-43384 9.8 CRITICAL net/tcp-ao: Fix MAC comparison to be constant-time
CVE-2026-43304 9.8 CRITICAL libceph: define and enforce CEPH_MAX_KEY_LEN
CVE-2026-43379 9.8 CRITICAL ksmbd: fix use-after-free in smb_lazy_parent_lease_break_close()
CVE-2026-43376 9.8 CRITICAL ksmbd: fix use-after-free by using call_rcu() for oplock_info
CVE-2026-43465 9.8 CRITICAL net/mlx5e: RX, Fix XDP multi-buf frag counting for striding RQ
CVE-2026-43378 9.8 CRITICAL smb: server: fix use-after-free in smb2_open()
CVE-2026-43383 9.4 CRITICAL net/tcp-md5: Fix MAC comparison to be constant-time
CVE-2026-43406 9.1 CRITICAL libceph: prevent potential out-of-bounds reads in process_message_header()
CVE-2026-43407 9.1 CRITICAL libceph: Fix potential out-of-bounds access in ceph_handle_auth_reply()
CVE-2026-43284 8.8 HIGH xfrm: esp: avoid in-place decrypt on shared skb frags
CVE-2026-43334 8.8 HIGH Bluetooth: SMP: force responder MITM requirements before building the pairing response
CVE-2026-43322 8.8 HIGH Bluetooth: hci_sync: Fix UAF in le_read_features_complete
CVE-2026-43403 8.8 HIGH nsfs: tighten permission checks for ns iteration ioctls
CVE-2026-43391 8.8 HIGH nsfs: tighten permission checks for handle opening
CVE-2026-43291 8.3 HIGH net: nfc: nci: Fix parameter validation for packet data
CVE-2026-43365 8.2 HIGH xfs: fix undersized l_iclog_roundoff values
CVE-2026-43466 8.2 HIGH net/mlx5e: Fix DMA FIFO desync on error CQE SQ recovery

Showing top 20 of 197 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-43289

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