In the Linux kernel, the following vulnerability has been resolved: net/sched: cls_flow: Dont expose folded kernel pointers The flow classifier falls back to addr_fold() for fields that are missing from packet headers. In map mode, userspace controls mask, xor, rshift, addend and divisor, and can observe the resulting classid through class statistics. This allows a tc classifier in a user/network namespace to recover the 32-bit folded value of skb->sk, skb_dst() or skb_nfct(). Align with standard kernel practices for pointer hashing and replace the XOR folding with a keyed siphash (which is cryptographically secure)

ubuntu_linux USN-9003-1: Ubuntu 24.04 LTS / Ubuntu 26.04 LTS / Ubuntu Pro Realtime 24.04 LTS : Linux kernel (NVIDIA) vulnerabilities (USN-9003-1)

An update of the linux package has been released.

The CentOS Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare CENTOS7:CLSA-2026:1792751247 advisory.

  - In the Linux kernel, the following vulnerability has been resolved: mmmremap.c: avoid pointless     invalidate_range_start/end on mremap(old_size=0) If an mremap() syscall with old_size=0 ends up in     move_page_tables(), it will call invalidate_range_start()/invalidate_range_end() unnecessarily, i.e. with     an empty range. This causes a WARN in KVM's mmu_notifier. In the past, empty ranges have been diagnosed to     be off-by-one bugs, hence the WARNing. Given the low (so far) number of unique reports, the benefits of     detecting more buggy callers seem to outweigh the cost of having to fix cases such as this one, where     userspace is doing something silly. In this particular case, an early return from move_page_tables() is     enough to fix the issue. (CVE-2022-49077)

  - In the Linux kernel, the following vulnerability has been resolved: virtio_console: eliminate anonymous     module_init & module_exit Eliminate anonymous module_init() and module_exit(), which can lead to confusion     or ambiguity when reading System.map, crashes/oops/bugs, or an initcall_debug log. Give each of these init     and exit functions unique driver-specific names to eliminate the anonymous names. Example 1: (System.map)     ffffffff832fc78c t init ffffffff832fc79e t init ffffffff832fc8f8 t init Example 2: (initcall_debug log)     calling init+0x0/0x12 @ 1 initcall init+0x0/0x12 returned 0 after 15 usecs calling init+0x0/0x60 @ 1     initcall init+0x0/0x60 returned 0 after 2 usecs calling init+0x0/0x9a @ 1 initcall init+0x0/0x9a returned     0 after 74 usecs (CVE-2022-49100)

  - In the Linux kernel, the following vulnerability has been resolved: mtd: Fix device name leak when     register device failed in add_mtd_device() There is a kmemleak when register device failed: unreferenced     object 0xffff888101aab550 (size 8): comm insmod, pid 3922, jiffies 4295277753 (age 925.408s) hex dump     (first 8 bytes): 6d 74 64 30 00 88 ff ff mtd0.... backtrace: [<00000000bde26724>]
    __kmalloc_node_track_caller+0x4e/0x150 [<000000003c32b416>] kvasprintf+0xb0/0x130 [<000000001f7a8f15>]     kobject_set_name_vargs+0x2f/0xb0 [<000000006e781163>] dev_set_name+0xab/0xe0 [<00000000e30d0c78>]     add_mtd_device+0x4bb/0x700 [<00000000f3d34de7>] mtd_device_parse_register+0x2ac/0x3f0 [<00000000c0d88488>]     0xffffffffa0238457 [<00000000b40d0922>] 0xffffffffa02a008f [<0000000023d17b9d>] do_one_initcall+0x87/0x2a0     [<00000000770f6ca6>] do_init_module+0xdf/0x320 [<000000007b6768fe>] load_module+0x2f98/0x3330     [<00000000346bed5a>] __do_sys_finit_module+0x113/0x1b0 [<00000000674c2290>] do_syscall_64+0x35/0x80     [<000000004c6a8d97>] entry_SYSCALL_64_after_hwframe+0x46/0xb0 If register device failed, should call     put_device() to give up the reference. (CVE-2022-50566)

  - In the Linux kernel, the following vulnerability has been resolved: media: dvb-frontends: fix leak of     memory fw (CVE-2022-50664)

  - In the Linux kernel, the following vulnerability has been resolved: acct: fix potential integer overflow     in encode_comp_t() The integer overflow is descripted with following codes: > 317 static comp_t     encode_comp_t(u64 value) > 318 { > 319 int exp, rnd; ...... > 341 exp <<= MANTSIZE; > 342 exp += value; >     343 return exp; > 344 } Currently comp_t is defined as type of '__u16', but the variable 'exp' is type of     'int', so overflow would happen when variable 'exp' in line 343 is greater than 65535. (CVE-2022-50749)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - net/sched: cls_flow: Dont expose folded kernel pointers The flow classifier falls back to addr_fold() for     fields that are missing from packet headers. In map mode, userspace controls mask, xor, rshift, addend and     divisor, and can observe the resulting classid through class statistics. This allows a tc classifier in a     user/network namespace to recover the 32-bit folded value of skb->sk, skb_dst() or skb_nfct(). Align with     standard kernel practices for pointer hashing and replace the XOR folding with a keyed siphash (which is     cryptographically secure) (CVE-2026-74290)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
375639	Photon OS 5.0: Linux PHSA-2026-5.0-91-0960	Nessus	PhotonOS Local Security Checks	Local	high
372116	CentOS Linux 7 [TuxCare] Security Update: bpftool / kernel / kernel-debug / kernel-debug-devel / kernel-devel / etc Multiple Vulnerabilities (CENTOS7:CLSA-2026:1792751247)	Nessus	CentOS Local Security Checks	Local	high
366749	SUSE SLES12: cluster-md-kmp-default / dlm-kmp-default / gfs2-kmp-default / etc (SUSE-SU-2026:4687-1)	Nessus	SuSE Local Security Checks	Local	high
366742	SUSE SLED15: cluster-md-kmp-default / dlm-kmp-default / gfs2-kmp-default / etc (SUSE-SU-2026:4706-1)	Nessus	SuSE Local Security Checks	Local	high
365768	Ubuntu 26.04 LTS : Linux kernel (Azure) vulnerabilities (USN-8888-1)	Nessus	Ubuntu Local Security Checks	Local	medium
365767	Ubuntu 26.04 LTS : Linux kernel vulnerabilities (USN-8887-1)	Nessus	Ubuntu Local Security Checks	Local	medium
365525	Ubuntu 24.04 LTS : Linux kernel (Azure) vulnerabilities (USN-8918-1)	Nessus	Ubuntu Local Security Checks	Local	medium
365522	Ubuntu 24.04 LTS : Linux kernel vulnerabilities (USN-8917-1)	Nessus	Ubuntu Local Security Checks	Local	medium
365463	Ubuntu 26.04 LTS : Linux kernel (OEM) vulnerabilities (USN-8889-1)	Nessus	Ubuntu Local Security Checks	Local	medium
343049	Oracle Linux 10 / 9 : Unbreakable Enterprise kernel (ELSA-2026-500248)	Nessus	Oracle Linux Local Security Checks	Local	high
341880	Amazon Linux 2023 : bpftool6.18, kernel6.18, kernel6.18-devel (ALAS2023-2026-2071)	Nessus	Amazon Linux Local Security Checks	Local	high
337239	Amazon Linux 2023 : bpftool6.12, kernel6.12, kernel6.12-devel (ALAS2023-2026-2057)	Nessus	Amazon Linux Local Security Checks	Local	high
337226	Amazon Linux 2023 : bpftool, kernel, kernel-devel (ALAS2023-2026-2058)	Nessus	Amazon Linux Local Security Checks	Local	high
335738	Linux Distros Unpatched Vulnerability : CVE-2026-74290	Nessus	Misc.	Local	high
334784	Photon OS 5.0: Linux PHSA-2026-5.0-92-0952	Nessus	PhotonOS Local Security Checks	Local	high

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