UBUNTU-CVE-2024-26816
In the Linux kernel, the following vulnerability has been resolved: x86, relocs: Ignore relocations in .notes section When building with CONFIG_XEN_PV=y, .text symbols are emitted into the .notes section so that Xen can find the "startup_xen" entry point. This information is used prior to booting the kernel, so relocations are not useful. In fact, performing relocations against the .notes section means that the KASLR base is exposed since /sys/kernel/notes is world-readable. To avoid leaking the KASLR base without breaking unprivileged tools that are expecting to read /sys/kernel/notes, skip performing relocations in the .notes section. The values readable in .notes are then identical to those found in System.map.
02 / AFFECTED SOFTWARE
Affected packages
11 explicit affected versions
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81 explicit affected versions
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49 explicit affected versions
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5 explicit affected versions
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1 explicit affected versions
10 explicit affected versions
2 explicit affected versions
13 explicit affected versions
81 explicit affected versions
13 explicit affected versions
45 explicit affected versions
7 explicit affected versions
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10 explicit affected versions
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80 explicit affected versions
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16 explicit affected versions
3 explicit affected versions
13 explicit affected versions
26 explicit affected versions
35 explicit affected versions
37 explicit affected versions
6 explicit affected versions
14 explicit affected versions
38 explicit affected versions
167 explicit affected versions
39 explicit affected versions
9 explicit affected versions
38 explicit affected versions
11 explicit affected versions
46 explicit affected versions
7 explicit affected versions
20 explicit affected versions
97 explicit affected versions
52 explicit affected versions
121 explicit affected versions
4 explicit affected versions
1 explicit affected versions
1 explicit affected versions
44 explicit affected versions
13 explicit affected versions
43 explicit affected versions
46 explicit affected versions
10 explicit affected versions
8 explicit affected versions
1 explicit affected versions
14 explicit affected versions
81 explicit affected versions
4 explicit affected versions
70 explicit affected versions
11 explicit affected versions
1 explicit affected versions
69 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
In the Linux kernel, the following vulnerability has been resolved: x86, relocs: Ignore relocations in .notes section When building with CONFIG_XEN_PV=y, .text symbols are emitted into the .notes section so that Xen can find the "startup_xen" entry point. This information is used prior to booting the kernel, so relocations are not useful. In fact, performing relocations against the .notes section means that the KASLR base is exposed since /sys/kernel/notes is world-readable. To avoid leaking the KASLR base without breaking unprivileged tools that are expecting to read /sys/kernel/notes, skip performing relocations in the .notes section. The values readable in .notes are then identical to those found in System.map.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/aaa8736370db1a78f0e8434344a484f9fd20be3b
- https://git.kernel.org/stable/c/13edb509abc91c72152a11baaf0e7c060a312e03
- https://git.kernel.org/stable/c/47635b112a64b7b208224962471e7e42f110e723
- https://git.kernel.org/stable/c/52018aa146e3cf76569a9b1e6e49a2b7c8d4a088
- https://git.kernel.org/stable/c/5cb59db49c9c0fccfd33b2209af4f7ae3c6ddf40
- https://git.kernel.org/stable/c/a4e7ff1a74274e59a2de9bb57236542aa990d20a
- https://git.kernel.org/stable/c/aaa8736370db1a78f0e8434344a484f9fd20be3b
- https://git.kernel.org/stable/c/ae7079238f6faf1b94accfccf334e98b46a0c0aa
- https://git.kernel.org/stable/c/af2a9f98d884205145fd155304a6955822ccca1c
- https://git.kernel.org/stable/c/c7cff9780297d55d97ad068b68b703cfe53ef9af
- https://ubuntu.com/security/CVE-2024-26816
- https://ubuntu.com/security/notices/USN-6816-1
- https://ubuntu.com/security/notices/USN-6817-1
- https://ubuntu.com/security/notices/USN-6817-2
- https://ubuntu.com/security/notices/USN-6817-3
- https://ubuntu.com/security/notices/USN-6820-1
- https://ubuntu.com/security/notices/USN-6820-2
- https://ubuntu.com/security/notices/USN-6821-1
- https://ubuntu.com/security/notices/USN-6821-2
- https://ubuntu.com/security/notices/USN-6821-3
- https://ubuntu.com/security/notices/USN-6821-4
- https://ubuntu.com/security/notices/USN-6828-1
- https://ubuntu.com/security/notices/USN-6871-1
- https://ubuntu.com/security/notices/USN-6878-1
- https://ubuntu.com/security/notices/USN-6892-1
- https://ubuntu.com/security/notices/USN-6896-1
- https://ubuntu.com/security/notices/USN-6896-2
- https://ubuntu.com/security/notices/USN-6896-3
- https://ubuntu.com/security/notices/USN-6896-4
- https://ubuntu.com/security/notices/USN-6896-5
- https://ubuntu.com/security/notices/USN-6919-1
- https://www.cve.org/CVERecord?id=CVE-2024-26816