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Ubuntu 20.04 Kernel Critical Memory Exposure Flaws USN-8597-1
ubuntu
July 23, 2026
Ubuntu released a security notice addressing multiple vulnerabilities in the Linux kernel affecting Ubuntu 20.04 LTS, necessitating immediate updates and potential recompilation of...
Summary
Several security issues were fixed in the Linux kernel.
Software Description:
- linux-ibm-5.15: Linux kernel for IBM cloud systems
Details:
Maxim Suhanov discovered that the NTFS file system implementation in the
Linux kernel did not properly validate file name length in certain
situations, leading to an out-of-bounds read. An attacker could use this to
construct a malicious NTFS image that, when mounted and operated on, could
expose sensitive information (kernel memory). (CVE-2023-45896)
It was discovered that some AMD processors did not properly clear data in
the floating point divider unit during speculative execution. A local
attacker could use this to expose sensitive information. (CVE-2025-54505)
It was discovered that some AMD Zen 2 processors did not properly isolate
shared resources in the operation cache. A local attacker could possibly
use this issue to corrupt instructions executed at a higher privilege
level, resulting in privilege escalation. (CVE-2025-54518)
Se...
Topics Covered
Update Instructions
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 20.04 LTS
linux-image-5.15.0-1106-ibm 5.15.0-1106.110~20.04.1
Available with Ubuntu Pro
linux-image-ibm 5.15.0.1106.110~20.04.1
Available with Ubuntu Pro
linux-image-ibm-5.15 5.15.0.1106.110~20.04.1
Available with Ubuntu Pro
After a standard system update you need to reboot your computer to make
all the necessary changes.
ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.References
https://ubuntu.com/security/notices/USN-8597-1
CVE-2022-49803, CVE-2022-49961, CVE-2022-50073, CVE-2022-50116,
CVE-2023-45896, CVE-2023-52682, CVE-2023-52737, CVE-2023-53545,
CVE-2023-53629, CVE-2024-27389, CVE-2024-35865, CVE-2024-36898,
CVE-2024-36922, CVE-2024-41079, CVE-2024-46715, CVE-2024-46770,
CVE-2024-47809, CVE-2024-50012, CVE-2024-53221, CVE-2024-56557,
CVE-2024-56584, CVE-2024-56657, CVE-2024-56719, CVE-2024-56727,
CVE-2025-21712, CVE-2025-22107, CVE-2025-23141, CVE-2025-38006,
CVE-2025-38105, CVE-2025-38192, CVE-2025-38562, CVE-2025-38626,
CVE-2025-38659, CVE-2025-38710, CVE-2025-39748, CVE-2025-39764,
CVE-2025-40005, CVE-2025-40016, CVE-2025-40103, CVE-2025-40323,
CVE-2025-54505, CVE-2025-54518, CVE-2025-68206, CVE-2025-68239,
CVE-2025-68256, CVE-2025-68307, CVE-2025-68358, CVE-2025-71150,
CVE-2025-71161, CVE-2025-71221, CVE-2025-71232, CVE-2025-71233,
CVE-2025-71235, CVE-2025-71236, CVE-2025-71237, CVE-2025-71238,
CVE-2025-71239, CVE-2025-71265, CVE-2025-71266, CVE-2025-71267,
CVE-2025-71274, CVE-2025-71287, CVE-2025-71292, CVE-2026-23031,
CVE-2026-23066, CVE-2026-23100, CVE-2026-23113, CVE-2026-23141,
CVE-2026-23157, CVE-2026-23169, CVE-2026-23204, CVE-2026-23220,
CVE-2026-23222, CVE-2026-23227, CVE-2026-23228, CVE-2026-23229,
CVE-2026-23235, CVE-2026-23236, CVE-2026-23237, CVE-2026-23238,
CVE-2026-23241, CVE-2026-23242, CVE-2026-23243, CVE-2026-23253,
CVE-2026-23266, CVE-2026-23270, CVE-2026-23277, CVE-2026-23279,
CVE-2026-23281, CVE-2026-23286, CVE-2026-23289, CVE-2026-23290,
CVE-2026-23291, CVE-2026-23293, CVE-2026-23296, CVE-2026-23298,
CVE-2026-23300, CVE-2026-23303, CVE-2026-23304, CVE-2026-23307,
CVE-2026-23312, CVE-2026-23318, CVE-2026-23324, CVE-2026-23335,
CVE-2026-23339, CVE-2026-23340, CVE-2026-23352, CVE-2026-23356,
CVE-2026-23357, CVE-2026-23362, CVE-2026-23365, CVE-2026-23367,
CVE-2026-23368, CVE-2026-23370, CVE-2026-23372, CVE-2026-23379,
CVE-2026-23381, CVE-2026-23382, CVE-2026-23388, CVE-2026-23391,
CVE-2026-23392, CVE-2026-23395, CVE-2026-23396, CVE-2026-23397,
CVE-2026-23398, CVE-2026-23399, CVE-2026-23401, CVE-2026-23420,
CVE-2026-23434, CVE-2026-23438, CVE-2026-23439, CVE-2026-23442,
CVE-2026-23446, CVE-2026-23452, CVE-2026-23454, CVE-2026-23456,
CVE-2026-23457, CVE-2026-23458, CVE-2026-23460, CVE-2026-23462,
CVE-2026-23463, CVE-2026-23474, CVE-2026-31393, CVE-2026-31400,
CVE-2026-31405, CVE-2026-31407, CVE-2026-31408, CVE-2026-31409,
CVE-2026-31411, CVE-2026-31415, CVE-2026-31416, CVE-2026-31417,
CVE-2026-31421, CVE-2026-31422, CVE-2026-31423, CVE-2026-31424,
CVE-2026-31425, CVE-2026-31427, CVE-2026-31428, CVE-2026-31433,
CVE-2026-31447, CVE-2026-31450, CVE-2026-31452, CVE-2026-31454,
CVE-2026-31466, CVE-2026-31467, CVE-2026-31469, CVE-2026-31473,
CVE-2026-31476, CVE-2026-31480, CVE-2026-31483, CVE-2026-31494,
CVE-2026-31495, CVE-2026-31497, CVE-2026-31498, CVE-2026-31507,
CVE-2026-31509, CVE-2026-31510, CVE-2026-31512, CVE-2026-31515,
CVE-2026-31518, CVE-2026-31521, CVE-2026-31522, CVE-2026-31523,
CVE-2026-31524, CVE-2026-31532, CVE-2026-31540, CVE-2026-31545,
CVE-2026-31546, CVE-2026-31549, CVE-2026-31550, CVE-2026-31551,
CVE-2026-31555, CVE-2026-31565, CVE-2026-31577, CVE-2026-31578,
CVE-2026-31581, CVE-2026-31585, CVE-2026-31586, CVE-2026-31588,
CVE-2026-31590, CVE-2026-31594, CVE-2026-31596, CVE-2026-31597,
CVE-2026-31598, CVE-2026-31599, CVE-2026-31602, CVE-2026-31603,
CVE-2026-31605, CVE-2026-31615, CVE-2026-31616, CVE-2026-31617,
CVE-2026-31618, CVE-2026-31619, CVE-2026-31622, CVE-2026-31623,
CVE-2026-31624, CVE-2026-31625, CVE-2026-31626, CVE-2026-31627,
CVE-2026-31628, CVE-2026-31629, CVE-2026-31630, CVE-2026-31634,
CVE-2026-31642, CVE-2026-31651, CVE-2026-31656, CVE-2026-31658,
CVE-2026-31660, CVE-2026-31661, CVE-2026-31662, CVE-2026-31664,
CVE-2026-31665, CVE-2026-31670, CVE-2026-31671, CVE-2026-31672,
CVE-2026-31673, CVE-2026-31674, CVE-2026-31676, CVE-2026-31679,
CVE-2026-31680, CVE-2026-31681, CVE-2026-31683, CVE-2026-31684,
CVE-2026-31687, CVE-2026-31694, CVE-2026-31695, CVE-2026-31696,
CVE-2026-31697, CVE-2026-31698, CVE-2026-31699, CVE-2026-31701,
CVE-2026-31716, CVE-2026-31720, CVE-2026-31721, CVE-2026-31726,
CVE-2026-31728, CVE-2026-31737, CVE-2026-31738, CVE-2026-31749,
CVE-2026-31751, CVE-2026-31752, CVE-2026-31754, CVE-2026-31755,
CVE-2026-31756, CVE-2026-31758, CVE-2026-31759, CVE-2026-31762,
CVE-2026-31763, CVE-2026-31770, CVE-2026-31773, CVE-2026-31778,
CVE-2026-31780, CVE-2026-31781, CVE-2026-43014, CVE-2026-43024,
CVE-2026-43026, CVE-2026-43028, CVE-2026-43030, CVE-2026-43032,
CVE-2026-43035, CVE-2026-43040, CVE-2026-43041, CVE-2026-43043,
CVE-2026-43046, CVE-2026-43047, CVE-2026-43050, CVE-2026-43051,
CVE-2026-43052, CVE-2026-43054, CVE-2026-43058, CVE-2026-43060,
CVE-2026-43061, CVE-2026-43062, CVE-2026-43065, CVE-2026-43066,
CVE-2026-43068, CVE-2026-43069, CVE-2026-43074, CVE-2026-43075,
CVE-2026-43076, CVE-2026-43079, CVE-2026-43080, CVE-2026-43085,
CVE-2026-43089, CVE-2026-43093, CVE-2026-43098, CVE-2026-43099,
CVE-2026-43103, CVE-2026-43104, CVE-2026-43105, CVE-2026-43110,
CVE-2026-43111, CVE-2026-43113, CVE-2026-43123, CVE-2026-43124,
CVE-2026-43130, CVE-2026-43132, CVE-2026-43134, CVE-2026-43135,
CVE-2026-43136, CVE-2026-43139, CVE-2026-43140, CVE-2026-43141,
CVE-2026-43145, CVE-2026-43147, CVE-2026-43148, CVE-2026-43149,
CVE-2026-43152, CVE-2026-43156, CVE-2026-43158, CVE-2026-43159,
CVE-2026-43163, CVE-2026-43168, CVE-2026-43171, CVE-2026-43182,
CVE-2026-43183, CVE-2026-43184, CVE-2026-43187, CVE-2026-43190,
CVE-2026-43194, CVE-2026-43196, CVE-2026-43200, CVE-2026-43202,
CVE-2026-43203, CVE-2026-43206, CVE-2026-43209, CVE-2026-43218,
CVE-2026-43223, CVE-2026-43225, CVE-2026-43226, CVE-2026-43227,
CVE-2026-43230, CVE-2026-43231, CVE-2026-43233, CVE-2026-43236,
CVE-2026-43241, CVE-2026-43242, CVE-2026-43246, CVE-2026-43251,
CVE-2026-43255, CVE-2026-43257, CVE-2026-43261, CVE-2026-43262,
CVE-2026-43264, CVE-2026-43266, CVE-2026-43268, CVE-2026-43269,
CVE-2026-43270, CVE-2026-43273, CVE-2026-43275, CVE-2026-43277,
CVE-2026-43279, CVE-2026-43281, CVE-2026-43287, CVE-2026-43289,
CVE-2026-43295, CVE-2026-43296, CVE-2026-43302, CVE-2026-43312,
CVE-2026-43313, CVE-2026-43314, CVE-2026-43315, CVE-2026-43316,
CVE-2026-43327, CVE-2026-43329, CVE-2026-43333, CVE-2026-43334,
CVE-2026-43336, CVE-2026-43339, CVE-2026-43340, CVE-2026-43342,
CVE-2026-43343, CVE-2026-43357, CVE-2026-43363, CVE-2026-43365,
CVE-2026-43370, CVE-2026-43373, CVE-2026-43381, CVE-2026-43382,
CVE-2026-43386, CVE-2026-43387, CVE-2026-43405, CVE-2026-43411,
CVE-2026-43420, CVE-2026-43425, CVE-2026-43427, CVE-2026-43428,
CVE-2026-43429, CVE-2026-43430, CVE-2026-43432, CVE-2026-43439,
CVE-2026-43445, CVE-2026-43449, CVE-2026-43450, CVE-2026-43451,
CVE-2026-43452, CVE-2026-43453, CVE-2026-43459, CVE-2026-43466,
CVE-2026-43469, CVE-2026-43472, CVE-2026-43473, CVE-2026-43475,
CVE-2026-43476, CVE-2026-43496, CVE-2026-43502, CVE-2026-45834,
CVE-2026-45835, CVE-2026-45836, CVE-2026-45839, CVE-2026-45840,
CVE-2026-45842, CVE-2026-45843, CVE-2026-45846, CVE-2026-45847,
CVE-2026-45848, CVE-2026-45852, CVE-2026-45856, CVE-2026-45857,
CVE-2026-45860, CVE-2026-45864, CVE-2026-45873, CVE-2026-45890,
CVE-2026-45891, CVE-2026-45899, CVE-2026-45902, CVE-2026-45904,
CVE-2026-45912, CVE-2026-45915, CVE-2026-45916, CVE-2026-45919,
CVE-2026-45920, CVE-2026-45924, CVE-2026-45935, CVE-2026-45936,
CVE-2026-45941, CVE-2026-45946, CVE-2026-45948, CVE-2026-45954,
CVE-2026-45956, CVE-2026-45958, CVE-2026-45960, CVE-2026-45964,
CVE-2026-45965, CVE-2026-45968, CVE-2026-45969, CVE-2026-45970,
CVE-2026-45974, CVE-2026-45978, CVE-2026-45983, CVE-2026-45984,
CVE-2026-45985, CVE-2026-45986, CVE-2026-45987, CVE-2026-45994,
CVE-2026-46002, CVE-2026-46004, CVE-2026-46006, CVE-2026-46009,
CVE-2026-46015, CVE-2026-46018, CVE-2026-46019, CVE-2026-46022,
CVE-2026-46023, CVE-2026-46024, CVE-2026-46027, CVE-2026-46033,
CVE-2026-46037, CVE-2026-46040, CVE-2026-46044, CVE-2026-46046,
CVE-2026-46047, CVE-2026-46049, CVE-2026-46050, CVE-2026-46051,
CVE-2026-46053, CVE-2026-46062, CVE-2026-46064, CVE-2026-46070,
CVE-2026-46072, CVE-2026-46077, CVE-2026-46080, CVE-2026-46082,
CVE-2026-46088, CVE-2026-46098, CVE-2026-46099, CVE-2026-46101,
CVE-2026-46102, CVE-2026-46107, CVE-2026-46108, CVE-2026-46112,
CVE-2026-46120, CVE-2026-46122, CVE-2026-46123, CVE-2026-46124,
CVE-2026-46127, CVE-2026-46128, CVE-2026-46132, CVE-2026-46133,
CVE-2026-46137, CVE-2026-46146, CVE-2026-46149, CVE-2026-46150,
CVE-2026-46151, CVE-2026-46161, CVE-2026-46163, CVE-2026-46167,
CVE-2026-46168, CVE-2026-46172, CVE-2026-46174, CVE-2026-46177,
CVE-2026-46178, CVE-2026-46184, CVE-2026-46186, CVE-2026-46187,
CVE-2026-46189, CVE-2026-46197, CVE-2026-46198, CVE-2026-46205,
CVE-2026-46206, CVE-2026-46209, CVE-2026-46212, CVE-2026-46214,
CVE-2026-46219, CVE-2026-46220, CVE-2026-46227, CVE-2026-46230,
CVE-2026-46231, CVE-2026-46233, CVE-2026-46234, CVE-2026-46236,
CVE-2026-46238, CVE-2026-46259, CVE-2026-46273, CVE-2026-46274,
CVE-2026-46275, CVE-2026-46303, CVE-2026-46304, CVE-2026-46319
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Severity
critical
Lowest
Low
Medium
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Critical
Ubuntu Security Notice USN-8597-1
Topics Covered
Package Information
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